{"id":7342,"date":"2021-10-29T13:11:04","date_gmt":"2021-10-29T11:11:04","guid":{"rendered":"https:\/\/www.uni.lu\/fstm-en\/events\/hybrid-physics-colloquiumcubic-and-lamellar-configurations-of-plant-plastid-membranes-and-their-structural-dynamics\/"},"modified":"2024-04-11T16:02:30","modified_gmt":"2024-04-11T14:02:30","slug":"hybrid-physics-colloquiumcubic-and-lamellar-configurations-of-plant-plastid-membranes-and-their-structural-dynamics","status":"publish","type":"events","link":"https:\/\/www.uni.lu\/fstm-en\/events\/hybrid-physics-colloquiumcubic-and-lamellar-configurations-of-plant-plastid-membranes-and-their-structural-dynamics\/","title":{"rendered":"Hybrid Physics Colloquium:&#8221;Cubic and lamellar configurations of plant plastid membranes and their structural dynamics&#8221;"},"content":{"rendered":"\n<section class=\"wp-block-unilux-blocks-free-section section\"><div class=\"container xl:max-w-screen-xl\">\n<p><strong>Campus Limpertsberg<\/strong><\/p>\n\n\n\n<p><strong>&nbsp;<\/strong><\/p>\n\n\n\n<p>&nbsp;<\/p>\n\n\n\n<p>Plastids are a diverse group of organelles present in different plant organs. They fulfill variable functions tightly connected to their inner membrane networks. For instance, as a site of photochemical reactions, the chloroplast thylakoid network is one of the most important and complicated membrane systems in nature. Internal membranes of plastids can adopt multiple structural configurations depending on the plant ontogenesis stage and aberrations in lipid-protein-pigment composition. We study the structure-composition interplay in cubic and lamellar arrangements self-organization during plastid biogenesis on light to understand how changes in the membrane composition influence formation and maintenance of such unique membrane assamblies.<\/p>\n\n\n\n<p>I will present the structural basis of membrane interconversions \u2013 from cubic prolamellar bodies of etioplasts to lamellar thylakoids of fully developed chloroplasts. 2D and 3D ultrastructural analyses performed using novel analytical methods (e.g., SPIRE software) will be supplemented with biochemical and functional results. &nbsp;Moreover, I will show the influence of different membrane components on the formation of a cubic prolamellar body in young seedlings as well as helical grana shape in fully developed plants and the importance of such spatial arrangement for photosynthetic efficiency. Illumination-induced thylakoid membrane dynamics in short time scales will be presented as another example of the structural plasticity of the thylakoid network.<\/p>\n\n\n\n<p>Kepler famously declared that \u201c<i>Where there is matter, there\u2019s geometry<\/i>\u201d. This quote hinted at the principal relevance of understanding geometry to do physics. Certainly, this statement holds true concerning biology. Protein folding is a core example, but so are the membrane arrangements and their importance and function in biology, which are only starting to be fully appreciated.<\/p>\n\n\n\n<p><strong>About the speaker:<\/strong><strong>&nbsp; <\/strong><\/p>\n\n\n\n<p><strong>Dr. \u0141ucja Kowalewska<\/strong><\/p>\n\n\n\n<p><strong>Department of Plant Anatomy and Cytology, Faculty of Biology, <\/strong><\/p>\n\n\n\n<p><strong>University of Warsaw, Poland<\/strong><\/p>\n\n\n\n<p>Dr. \u0141ucja Kowalewska received her Ph.D. degree in Biology from the University of Warsaw in 2015 and is currently employed at the Faculty of Biology (University of Warsaw) in the Department of Plant Anatomy and Cytology as an Assistant Professor. In 2019 she was a visiting scientist at Copenhagen University developing interdisciplinary collaboration to study the basis of cubic membrane formation in plant plastids and teaching at Ph.D. school on Self-assembly of Biomolecules and Soft Materials.<\/p>\n\n\n\n<p>Her research is centered around structural plasticity of the plastid inner membrane network and particularly cubic-lamellar transition during chloroplast biogenesis, the formation of paracrystalline membrane network of prolamellar bodies in etioplasts, and spatial arrangement of the thylakoid network of fully developed plants. She has combined expertise in 2D and 3D ultrastructural studies of plastids using transmission electron microscopy and electron tomography and in <i>in vivo<\/i> spatial studies of chloroplasts using confocal microscopy. She also supplements her structural studies with biochemical and biophysical analyses to reveal the connection between the structure and function of the thylakoid network.<\/p>\n<\/div><\/section>\n","protected":false},"excerpt":{"rendered":"<p>Hybrid Physics Colloquium\u00a08th of December 2021 at 4.00 pm\u00a0Campus LimpertsbergB\u00e2timent des Sciences \u2013 room BSC 0.03\u00a0Webex link \u00a0Talk by Dr.\u00a0\u0141ucja KowalewskaDepartment of Plant Anatomy and Cytology, Faculty of Biology, \u00a0University of Warsaw, PolandInvited by Prof. Anupam Sengupta\u00a0Cubic and lamellar configurations of plant plastid membranes and their structural dynamicsPlastids are a diverse group of organelles present in different plant organs. They fulfill variable functions tightly connected to their inner membrane networks. For instance, as a site of photochemical reactions, the chloroplast thylakoid network is one of the most important and complicated membrane systems in nature. Internal membranes of plastids can adopt multiple structural configurations depending on the plant ontogenesis stage and aberrations in lipid-protein-pigment composition. We study the structure-composition interplay in cubic and lamellar arrangements self-organization during plastid biogenesis on light to understand how changes in the membrane composition influence formation and maintenance of such unique membrane assamblies.I will present the structural basis of membrane interconversions \u2013 from cubic prolamellar bodies of etioplasts to lamellar thylakoids of fully developed chloroplasts. 2D and 3D ultrastructural analyses performed using novel analytical methods (e.g., SPIRE software) will be supplemented with biochemical and functional results. \u00a0Moreover, I will show the influence of different membrane components on the formation of a cubic prolamellar body in young seedlings as well as helical grana shape in fully developed plants and the importance of such spatial arrangement for photosynthetic efficiency. Illumination-induced thylakoid membrane dynamics in short time scales will be presented as another example of the structural plasticity of the thylakoid network.Kepler famously declared that \u201cWhere there is matter, there\u2019s geometry\u201d. This quote hinted at the principal relevance of understanding geometry to do physics. Certainly, this statement holds true concerning biology. Protein folding is a core example, but so are the membrane arrangements and their importance and function in biology, which are only starting to be fully appreciated.\u00a0About the speaker:\u00a0 Dr. \u0141ucja KowalewskaDepartment of Plant Anatomy and Cytology, Faculty of Biology, University of Warsaw, PolandDr. \u0141ucja Kowalewska received her Ph.D. degree in Biology from the University of Warsaw in 2015 and is currently employed at the Faculty of Biology (University of Warsaw) in the Department of Plant Anatomy and Cytology as an Assistant Professor. In 2019 she was a visiting scientist at Copenhagen University developing interdisciplinary collaboration to study the basis of cubic membrane formation in plant plastids and teaching at Ph.D. school on Self-assembly of Biomolecules and Soft Materials.Her research is centered around structural plasticity of the plastid inner membrane network and particularly cubic-lamellar transition during chloroplast biogenesis, the formation of paracrystalline membrane network of prolamellar bodies in etioplasts, and spatial arrangement of the thylakoid network of fully developed plants. She has combined expertise in 2D and 3D ultrastructural studies of plastids using transmission electron microscopy and electron tomography and in in vivo spatial studies of chloroplasts using confocal microscopy. She also supplements her structural studies with biochemical and biophysical analyses to reveal the connection between the structure and function of the thylakoid network.<\/p>\n","protected":false},"author":44,"featured_media":7343,"parent":0,"menu_order":0,"comment_status":"open","ping_status":"closed","template":"","format":"standard","meta":{"featured_image_focal_point":[],"show_featured_caption":false,"ulux_newsletter_groups":"","uluxPostTitle":"","uluxPrePostTitle":"","_trash_the_other_posts":false,"_price":"","_stock":"","_tribe_ticket_header":"","_tribe_default_ticket_provider":"","_tribe_ticket_capacity":"0","_ticket_start_date":"","_ticket_end_date":"","_tribe_ticket_show_description":"","_tribe_ticket_show_not_going":false,"_tribe_ticket_use_global_stock":"","_tribe_ticket_global_stock_level":"","_global_stock_mode":"","_global_stock_cap":"","_tribe_rsvp_for_event":"","_tribe_ticket_going_count":"","_tribe_ticket_not_going_count":"","_tribe_tickets_list":"[]","_tribe_ticket_has_attendee_info_fields":false,"event_start_date":"2021-12-08 16:00:00","event_end_date":"2021-12-08 17:00:00","event_speaker_name":"Talk by Dr. \u0141ucja Kowalewska,Department of Plant Anatomy and Cytology, Faculty of Biology,  University of Warsaw, Poland,Invited by Prof. Anupam Sengupta","event_speaker_link":"","event_is_online":false,"event_location":" B\u00e2timent des Sciences,room BSC 0.03 - Webex link ","event_street":"","event_location_link":"","event_zip_code":"L-1511","event_city":"Luxembourg","event_country":"LU"},"events-topic":[315],"events-type":[],"organisation":[80],"authorship":[44],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.3 (Yoast SEO v22.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Hybrid Physics Colloquium:&quot;Cubic and lamellar configurations of plant plastid membranes and their structural dynamics&quot; - FSTM events I Uni.lu<\/title>\n<meta name=\"description\" content=\"Hybrid Physics Colloquium\u00a08th of December 2021 at 4.00 pm\u00a0Campus LimpertsbergB\u00e2timent des Sciences \u2013 room BSC 0.03\u00a0Webex link \u00a0Talk by Dr.\u00a0\u0141ucja KowalewskaDepartment of Plant Anatomy and Cytology, Faculty of Biology, \u00a0University of Warsaw, PolandInvited by Prof. Anupam Sengupta\u00a0Cubic and lamellar configurations of plant plastid membranes and their structural dynamicsPlastids are a diverse group of organelles present in different plant organs. They fulfill variable functions tightly connected to their inner membrane networks. For instance, as a site of photochemical reactions, the chloroplast thylakoid network is one of the most important and complicated membrane systems in nature. Internal membranes of plastids can adopt multiple structural configurations depending on the plant ontogenesis stage and aberrations in lipid-protein-pigment composition. We study the structure-composition interplay in cubic and lamellar arrangements self-organization during plastid biogenesis on light to understand how changes in the membrane composition influence formation and maintenance of such unique membrane assamblies.I will present the structural basis of membrane interconversions \u2013 from cubic prolamellar bodies of etioplasts to lamellar thylakoids of fully developed chloroplasts. 2D and 3D ultrastructural analyses performed using novel analytical methods (e.g., SPIRE software) will be supplemented with biochemical and functional results. \u00a0Moreover, I will show the influence of different membrane components on the formation of a cubic prolamellar body in young seedlings as well as helical grana shape in fully developed plants and the importance of such spatial arrangement for photosynthetic efficiency. Illumination-induced thylakoid membrane dynamics in short time scales will be presented as another example of the structural plasticity of the thylakoid network.Kepler famously declared that \u201cWhere there is matter, there\u2019s geometry\u201d. This quote hinted at the principal relevance of understanding geometry to do physics. Certainly, this statement holds true concerning biology. Protein folding is a core example, but so are the membrane arrangements and their importance and function in biology, which are only starting to be fully appreciated.\u00a0About the speaker:\u00a0 Dr. \u0141ucja KowalewskaDepartment of Plant Anatomy and Cytology, Faculty of Biology, University of Warsaw, PolandDr. \u0141ucja Kowalewska received her Ph.D. degree in Biology from the University of Warsaw in 2015 and is currently employed at the Faculty of Biology (University of Warsaw) in the Department of Plant Anatomy and Cytology as an Assistant Professor. In 2019 she was a visiting scientist at Copenhagen University developing interdisciplinary collaboration to study the basis of cubic membrane formation in plant plastids and teaching at Ph.D. school on Self-assembly of Biomolecules and Soft Materials.Her research is centered around structural plasticity of the plastid inner membrane network and particularly cubic-lamellar transition during chloroplast biogenesis, the formation of paracrystalline membrane network of prolamellar bodies in etioplasts, and spatial arrangement of the thylakoid network of fully developed plants. She has combined expertise in 2D and 3D ultrastructural studies of plastids using transmission electron microscopy and electron tomography and in in vivo spatial studies of chloroplasts using confocal microscopy. She also supplements her structural studies with biochemical and biophysical analyses to reveal the connection between the structure and function of the thylakoid network.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.uni.lu\/fstm-en\/events\/hybrid-physics-colloquiumcubic-and-lamellar-configurations-of-plant-plastid-membranes-and-their-structural-dynamics\/\" \/>\n<meta property=\"og:locale\" content=\"en_GB\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Hybrid Physics Colloquium:&quot;Cubic and lamellar configurations of plant plastid membranes and their structural dynamics&quot;\" \/>\n<meta property=\"og:description\" content=\"Hybrid Physics Colloquium\u00a08th of December 2021 at 4.00 pm\u00a0Campus LimpertsbergB\u00e2timent des Sciences \u2013 room BSC 0.03\u00a0Webex link \u00a0Talk by Dr.\u00a0\u0141ucja KowalewskaDepartment of Plant Anatomy and Cytology, Faculty of Biology, \u00a0University of Warsaw, PolandInvited by Prof. Anupam Sengupta\u00a0Cubic and lamellar configurations of plant plastid membranes and their structural dynamicsPlastids are a diverse group of organelles present in different plant organs. They fulfill variable functions tightly connected to their inner membrane networks. For instance, as a site of photochemical reactions, the chloroplast thylakoid network is one of the most important and complicated membrane systems in nature. Internal membranes of plastids can adopt multiple structural configurations depending on the plant ontogenesis stage and aberrations in lipid-protein-pigment composition. We study the structure-composition interplay in cubic and lamellar arrangements self-organization during plastid biogenesis on light to understand how changes in the membrane composition influence formation and maintenance of such unique membrane assamblies.I will present the structural basis of membrane interconversions \u2013 from cubic prolamellar bodies of etioplasts to lamellar thylakoids of fully developed chloroplasts. 2D and 3D ultrastructural analyses performed using novel analytical methods (e.g., SPIRE software) will be supplemented with biochemical and functional results. \u00a0Moreover, I will show the influence of different membrane components on the formation of a cubic prolamellar body in young seedlings as well as helical grana shape in fully developed plants and the importance of such spatial arrangement for photosynthetic efficiency. Illumination-induced thylakoid membrane dynamics in short time scales will be presented as another example of the structural plasticity of the thylakoid network.Kepler famously declared that \u201cWhere there is matter, there\u2019s geometry\u201d. This quote hinted at the principal relevance of understanding geometry to do physics. Certainly, this statement holds true concerning biology. Protein folding is a core example, but so are the membrane arrangements and their importance and function in biology, which are only starting to be fully appreciated.\u00a0About the speaker:\u00a0 Dr. \u0141ucja KowalewskaDepartment of Plant Anatomy and Cytology, Faculty of Biology, University of Warsaw, PolandDr. \u0141ucja Kowalewska received her Ph.D. degree in Biology from the University of Warsaw in 2015 and is currently employed at the Faculty of Biology (University of Warsaw) in the Department of Plant Anatomy and Cytology as an Assistant Professor. In 2019 she was a visiting scientist at Copenhagen University developing interdisciplinary collaboration to study the basis of cubic membrane formation in plant plastids and teaching at Ph.D. school on Self-assembly of Biomolecules and Soft Materials.Her research is centered around structural plasticity of the plastid inner membrane network and particularly cubic-lamellar transition during chloroplast biogenesis, the formation of paracrystalline membrane network of prolamellar bodies in etioplasts, and spatial arrangement of the thylakoid network of fully developed plants. She has combined expertise in 2D and 3D ultrastructural studies of plastids using transmission electron microscopy and electron tomography and in in vivo spatial studies of chloroplasts using confocal microscopy. She also supplements her structural studies with biochemical and biophysical analyses to reveal the connection between the structure and function of the thylakoid network.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.uni.lu\/fstm-en\/events\/hybrid-physics-colloquiumcubic-and-lamellar-configurations-of-plant-plastid-membranes-and-their-structural-dynamics\/\" \/>\n<meta property=\"og:site_name\" content=\"FSTM EN\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/fstm.uni.lu\/\" \/>\n<meta property=\"article:modified_time\" content=\"2024-04-11T14:02:30+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.uni.lu\/wp-content\/uploads\/sites\/4\/2021\/10\/hybrid_physics_colloquium_cubic_and_lamellar_configurations_of_plant_plastid_membranes_and_their_structural_dynamics.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"800\" \/>\n\t<meta property=\"og:image:height\" content=\"600\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Estimated reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"2 minutes\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.uni.lu\/fstm-en\/events\/hybrid-physics-colloquiumcubic-and-lamellar-configurations-of-plant-plastid-membranes-and-their-structural-dynamics\/\",\"url\":\"https:\/\/www.uni.lu\/fstm-en\/events\/hybrid-physics-colloquiumcubic-and-lamellar-configurations-of-plant-plastid-membranes-and-their-structural-dynamics\/\",\"name\":\"Hybrid Physics Colloquium:\\\"Cubic and lamellar configurations of plant plastid membranes and their structural dynamics\\\" - FSTM events I Uni.lu\",\"isPartOf\":{\"@id\":\"https:\/\/www.uni.lu\/fstm-en\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/www.uni.lu\/fstm-en\/events\/hybrid-physics-colloquiumcubic-and-lamellar-configurations-of-plant-plastid-membranes-and-their-structural-dynamics\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/www.uni.lu\/fstm-en\/events\/hybrid-physics-colloquiumcubic-and-lamellar-configurations-of-plant-plastid-membranes-and-their-structural-dynamics\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/www.uni.lu\/wp-content\/uploads\/sites\/4\/2021\/10\/hybrid_physics_colloquium_cubic_and_lamellar_configurations_of_plant_plastid_membranes_and_their_structural_dynamics.jpg\",\"datePublished\":\"2021-10-29T11:11:04+00:00\",\"dateModified\":\"2024-04-11T14:02:30+00:00\",\"description\":\"Hybrid Physics Colloquium\u00a08th of December 2021 at 4.00 pm\u00a0Campus LimpertsbergB\u00e2timent des Sciences \u2013 room BSC 0.03\u00a0Webex link \u00a0Talk by Dr.\u00a0\u0141ucja KowalewskaDepartment of Plant Anatomy and Cytology, Faculty of Biology, \u00a0University of Warsaw, PolandInvited by Prof. Anupam Sengupta\u00a0Cubic and lamellar configurations of plant plastid membranes and their structural dynamicsPlastids are a diverse group of organelles present in different plant organs. They fulfill variable functions tightly connected to their inner membrane networks. For instance, as a site of photochemical reactions, the chloroplast thylakoid network is one of the most important and complicated membrane systems in nature. Internal membranes of plastids can adopt multiple structural configurations depending on the plant ontogenesis stage and aberrations in lipid-protein-pigment composition. We study the structure-composition interplay in cubic and lamellar arrangements self-organization during plastid biogenesis on light to understand how changes in the membrane composition influence formation and maintenance of such unique membrane assamblies.I will present the structural basis of membrane interconversions \u2013 from cubic prolamellar bodies of etioplasts to lamellar thylakoids of fully developed chloroplasts. 2D and 3D ultrastructural analyses performed using novel analytical methods (e.g., SPIRE software) will be supplemented with biochemical and functional results. \u00a0Moreover, I will show the influence of different membrane components on the formation of a cubic prolamellar body in young seedlings as well as helical grana shape in fully developed plants and the importance of such spatial arrangement for photosynthetic efficiency. Illumination-induced thylakoid membrane dynamics in short time scales will be presented as another example of the structural plasticity of the thylakoid network.Kepler famously declared that \u201cWhere there is matter, there\u2019s geometry\u201d. This quote hinted at the principal relevance of understanding geometry to do physics. Certainly, this statement holds true concerning biology. Protein folding is a core example, but so are the membrane arrangements and their importance and function in biology, which are only starting to be fully appreciated.\u00a0About the speaker:\u00a0 Dr. \u0141ucja KowalewskaDepartment of Plant Anatomy and Cytology, Faculty of Biology, University of Warsaw, PolandDr. \u0141ucja Kowalewska received her Ph.D. degree in Biology from the University of Warsaw in 2015 and is currently employed at the Faculty of Biology (University of Warsaw) in the Department of Plant Anatomy and Cytology as an Assistant Professor. 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They fulfill variable functions tightly connected to their inner membrane networks. For instance, as a site of photochemical reactions, the chloroplast thylakoid network is one of the most important and complicated membrane systems in nature. Internal membranes of plastids can adopt multiple structural configurations depending on the plant ontogenesis stage and aberrations in lipid-protein-pigment composition. We study the structure-composition interplay in cubic and lamellar arrangements self-organization during plastid biogenesis on light to understand how changes in the membrane composition influence formation and maintenance of such unique membrane assamblies.I will present the structural basis of membrane interconversions \u2013 from cubic prolamellar bodies of etioplasts to lamellar thylakoids of fully developed chloroplasts. 2D and 3D ultrastructural analyses performed using novel analytical methods (e.g., SPIRE software) will be supplemented with biochemical and functional results. \u00a0Moreover, I will show the influence of different membrane components on the formation of a cubic prolamellar body in young seedlings as well as helical grana shape in fully developed plants and the importance of such spatial arrangement for photosynthetic efficiency. Illumination-induced thylakoid membrane dynamics in short time scales will be presented as another example of the structural plasticity of the thylakoid network.Kepler famously declared that \u201cWhere there is matter, there\u2019s geometry\u201d. This quote hinted at the principal relevance of understanding geometry to do physics. Certainly, this statement holds true concerning biology. Protein folding is a core example, but so are the membrane arrangements and their importance and function in biology, which are only starting to be fully appreciated.\u00a0About the speaker:\u00a0 Dr. \u0141ucja KowalewskaDepartment of Plant Anatomy and Cytology, Faculty of Biology, University of Warsaw, PolandDr. \u0141ucja Kowalewska received her Ph.D. degree in Biology from the University of Warsaw in 2015 and is currently employed at the Faculty of Biology (University of Warsaw) in the Department of Plant Anatomy and Cytology as an Assistant Professor. In 2019 she was a visiting scientist at Copenhagen University developing interdisciplinary collaboration to study the basis of cubic membrane formation in plant plastids and teaching at Ph.D. school on Self-assembly of Biomolecules and Soft Materials.Her research is centered around structural plasticity of the plastid inner membrane network and particularly cubic-lamellar transition during chloroplast biogenesis, the formation of paracrystalline membrane network of prolamellar bodies in etioplasts, and spatial arrangement of the thylakoid network of fully developed plants. She has combined expertise in 2D and 3D ultrastructural studies of plastids using transmission electron microscopy and electron tomography and in in vivo spatial studies of chloroplasts using confocal microscopy. She also supplements her structural studies with biochemical and biophysical analyses to reveal the connection between the structure and function of the thylakoid network.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.uni.lu\/fstm-en\/events\/hybrid-physics-colloquiumcubic-and-lamellar-configurations-of-plant-plastid-membranes-and-their-structural-dynamics\/","og_locale":"en_GB","og_type":"article","og_title":"Hybrid Physics Colloquium:\"Cubic and lamellar configurations of plant plastid membranes and their structural dynamics\"","og_description":"Hybrid Physics Colloquium\u00a08th of December 2021 at 4.00 pm\u00a0Campus LimpertsbergB\u00e2timent des Sciences \u2013 room BSC 0.03\u00a0Webex link \u00a0Talk by Dr.\u00a0\u0141ucja KowalewskaDepartment of Plant Anatomy and Cytology, Faculty of Biology, \u00a0University of Warsaw, PolandInvited by Prof. Anupam Sengupta\u00a0Cubic and lamellar configurations of plant plastid membranes and their structural dynamicsPlastids are a diverse group of organelles present in different plant organs. They fulfill variable functions tightly connected to their inner membrane networks. For instance, as a site of photochemical reactions, the chloroplast thylakoid network is one of the most important and complicated membrane systems in nature. Internal membranes of plastids can adopt multiple structural configurations depending on the plant ontogenesis stage and aberrations in lipid-protein-pigment composition. We study the structure-composition interplay in cubic and lamellar arrangements self-organization during plastid biogenesis on light to understand how changes in the membrane composition influence formation and maintenance of such unique membrane assamblies.I will present the structural basis of membrane interconversions \u2013 from cubic prolamellar bodies of etioplasts to lamellar thylakoids of fully developed chloroplasts. 2D and 3D ultrastructural analyses performed using novel analytical methods (e.g., SPIRE software) will be supplemented with biochemical and functional results. \u00a0Moreover, I will show the influence of different membrane components on the formation of a cubic prolamellar body in young seedlings as well as helical grana shape in fully developed plants and the importance of such spatial arrangement for photosynthetic efficiency. Illumination-induced thylakoid membrane dynamics in short time scales will be presented as another example of the structural plasticity of the thylakoid network.Kepler famously declared that \u201cWhere there is matter, there\u2019s geometry\u201d. This quote hinted at the principal relevance of understanding geometry to do physics. Certainly, this statement holds true concerning biology. Protein folding is a core example, but so are the membrane arrangements and their importance and function in biology, which are only starting to be fully appreciated.\u00a0About the speaker:\u00a0 Dr. \u0141ucja KowalewskaDepartment of Plant Anatomy and Cytology, Faculty of Biology, University of Warsaw, PolandDr. \u0141ucja Kowalewska received her Ph.D. degree in Biology from the University of Warsaw in 2015 and is currently employed at the Faculty of Biology (University of Warsaw) in the Department of Plant Anatomy and Cytology as an Assistant Professor. In 2019 she was a visiting scientist at Copenhagen University developing interdisciplinary collaboration to study the basis of cubic membrane formation in plant plastids and teaching at Ph.D. school on Self-assembly of Biomolecules and Soft Materials.Her research is centered around structural plasticity of the plastid inner membrane network and particularly cubic-lamellar transition during chloroplast biogenesis, the formation of paracrystalline membrane network of prolamellar bodies in etioplasts, and spatial arrangement of the thylakoid network of fully developed plants. She has combined expertise in 2D and 3D ultrastructural studies of plastids using transmission electron microscopy and electron tomography and in in vivo spatial studies of chloroplasts using confocal microscopy. 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They fulfill variable functions tightly connected to their inner membrane networks. For instance, as a site of photochemical reactions, the chloroplast thylakoid network is one of the most important and complicated membrane systems in nature. Internal membranes of plastids can adopt multiple structural configurations depending on the plant ontogenesis stage and aberrations in lipid-protein-pigment composition. We study the structure-composition interplay in cubic and lamellar arrangements self-organization during plastid biogenesis on light to understand how changes in the membrane composition influence formation and maintenance of such unique membrane assamblies.I will present the structural basis of membrane interconversions \u2013 from cubic prolamellar bodies of etioplasts to lamellar thylakoids of fully developed chloroplasts. 2D and 3D ultrastructural analyses performed using novel analytical methods (e.g., SPIRE software) will be supplemented with biochemical and functional results. \u00a0Moreover, I will show the influence of different membrane components on the formation of a cubic prolamellar body in young seedlings as well as helical grana shape in fully developed plants and the importance of such spatial arrangement for photosynthetic efficiency. Illumination-induced thylakoid membrane dynamics in short time scales will be presented as another example of the structural plasticity of the thylakoid network.Kepler famously declared that \u201cWhere there is matter, there\u2019s geometry\u201d. This quote hinted at the principal relevance of understanding geometry to do physics. Certainly, this statement holds true concerning biology. Protein folding is a core example, but so are the membrane arrangements and their importance and function in biology, which are only starting to be fully appreciated.\u00a0About the speaker:\u00a0 Dr. \u0141ucja KowalewskaDepartment of Plant Anatomy and Cytology, Faculty of Biology, University of Warsaw, PolandDr. \u0141ucja Kowalewska received her Ph.D. degree in Biology from the University of Warsaw in 2015 and is currently employed at the Faculty of Biology (University of Warsaw) in the Department of Plant Anatomy and Cytology as an Assistant Professor. In 2019 she was a visiting scientist at Copenhagen University developing interdisciplinary collaboration to study the basis of cubic membrane formation in plant plastids and teaching at Ph.D. school on Self-assembly of Biomolecules and Soft Materials.Her research is centered around structural plasticity of the plastid inner membrane network and particularly cubic-lamellar transition during chloroplast biogenesis, the formation of paracrystalline membrane network of prolamellar bodies in etioplasts, and spatial arrangement of the thylakoid network of fully developed plants. She has combined expertise in 2D and 3D ultrastructural studies of plastids using transmission electron microscopy and electron tomography and in in vivo spatial studies of chloroplasts using confocal microscopy. 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