{"id":468,"date":"2023-06-16T10:51:35","date_gmt":"2023-06-16T01:51:35","guid":{"rendered":"https:\/\/www.elst.okayama-u.ac.jp\/en\/?page_id=468"},"modified":"2026-05-12T14:07:22","modified_gmt":"2026-05-12T05:07:22","slug":"areas11_pstress","status":"publish","type":"page","link":"https:\/\/www.elst.okayama-u.ac.jp\/en\/education\/mc-chikyu\/areas11_pstress\/","title":{"rendered":"Plant Genetics and Physiology"},"content":{"rendered":"<h4><span style=\"font-size: 18pt\">Plant Genetics and Physiology<\/span><\/h4>\n<p><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-69 aligncenter\" src=\"https:\/\/www.elst.okayama-u.ac.jp\/up_load_files\/areas\/areas11_pstress\/theme.jpg\" alt=\"\" width=\"386\" height=\"279\"><\/p>\n<p><span style=\"font-size: 12pt\">Our life on earth cannot continue without the atmospheric environment, which is maintained by oxygenic photosynthesis. Plants perform photosynthesis in chloroplasts, where light energy is converted into chemical energy by a series of electrochemical reactions. In contrast, land plants are exposed incessantly to excess light energy or harsh atmospheric environments that engender \u2018photodamage\u2019. How do plants cope with such photosynthetic inactivation? What are the key elements to maintaining or even maximizing chloroplast functions? Our group studies various aspects of chloroplast development and photosynthesis. By understanding the factors involved in photoprotection and chloroplast function, we aim to improve crop productivity against atmospheric stress over the long term.<\/span><\/p>\n<ul>\n<li><a href=\"http:\/\/www.rib.okayama-u.ac.jp\/saka\/e\/index.html\">Link to group homepage<\/a><\/li>\n<\/ul>\n<table class=\"el_table_fix\" style=\"width: 100%\">\n<tbody>\n<tr>\n<th style=\"width: 20%\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium\" src=\"https:\/\/www.elst.okayama-u.ac.jp\/up_load_files\/areas\/areas11_pstress\/SAKAMOTO Wataru.jpg\" width=\"320\" height=\"408\"><\/th>\n<td style=\"width: 80%\">\n<ul>\n<li style=\"list-style-type: none;font-size: 12px;margin-left: -20px\"><span style=\"font-size: 12pt\">Prof. SAKAMOTO Wataru<\/span><\/li>\n<li style=\"list-style-type: none;font-size: 12px;margin-left: -20px\"><span style=\"font-size: 12pt\">E-mail: saka<span style=\"color: #0000ff\"> [at]<\/span> okayama-u.ac.jp<\/span><\/li>\n<li style=\"list-style-type: none;font-size: 12px;margin-left: -20px\"><span style=\"font-size: 12pt\">Chloroplast \/ Photosynthesis\n<p><\/span><\/li>\n<\/ul>\n<p><span style=\"font-size: 12pt\"><a class=\"el_linkBtn\" href=\"https:\/\/soran.cc.okayama-u.ac.jp\/html\/c18c41b75152f52474506e4da22f6611_en.html\">Directory of Researchers<\/a>&nbsp;<\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<div style=\"width: 276px\" class=\"wp-caption alignright\"><a href=\"https:\/\/www.elst.okayama-u.ac.jp\/up_load_files\/areas\/areas11_pstress\/img_SAKAMOTO.png\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.elst.okayama-u.ac.jp\/up_load_files\/areas\/areas11_pstress\/img_SAKAMOTO.png\" alt=\"\" width=\"266\" height=\"203\"><\/a><p class=\"wp-caption-text\">Stay-green mutant with preserved photosynthetic capacity (left) and VIPP1, a novel large protein complex that plays a central role in thylakoid membrane biogenesis (right)<\/p><\/div>\n<p>We study the regulatory functions of chloroplasts that enable plants to adapt to various light environments. In particular, we are studying a novel, large protein complex involved in thylakoid membrane biogenesis, essential for the scaffold supporting the photosynthetic energy conversion reaction. Our research also involves the characterization of novel &#8216;stay-green&#8217; mutants that sustain the photosynthetic capacity of aged leaves through the maintenance and degradation of chloroplast DNA.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<table class=\"el_table_fix\" style=\"width: 100%\">\n<tbody>\n<tr>\n<th style=\"width: 20%\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium\" src=\"https:\/\/www.elst.okayama-u.ac.jp\/up_load_files\/areas\/areas11_pstress\/OZAWA Shinichirou.png\" width=\"320\" height=\"408\"><\/th>\n<td style=\"width: 80%\">\n<ul>\n<li style=\"list-style-type: none;font-size: 12px;margin-left: -20px\"><span style=\"font-size: 12pt\">Assoc. Prof. OZAWA Shin-Ichiro<\/span><\/li>\n<li style=\"list-style-type: none;font-size: 12px;margin-left: -20px\"><span style=\"font-size: 12pt\">E-mail: OzwSh1r <span style=\"color: #0000ff\">[at]<\/span> okayama-u.ac.jp<\/span><\/li>\n<li style=\"list-style-type: none;font-size: 12px;margin-left: -20px\"><span style=\"font-size: 12pt\">Light-harvesting complex \/ Protein structural biology\n<p><\/span><\/li>\n<\/ul>\n<p><span style=\"font-size: 12pt\"><a class=\"el_linkBtn\" href=\"https:\/\/soran.cc.okayama-u.ac.jp\/html\/af94ba79d0f48e1b74506e4da22f6611_en.html\">Directory of Researchers<\/a> \u3000<a class=\"el_linkBtn\" href=\"http:\/\/www.rib.okayama-u.ac.jp\/RECTOR\/\">Homepage<\/a><\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h5>&nbsp;<\/h5>\n<div style=\"width: 240px\" class=\"wp-caption alignright\"><a href=\"https:\/\/www.elst.okayama-u.ac.jp\/up_load_files\/areas\/areas11_pstress\/img_OZAWA.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.elst.okayama-u.ac.jp\/up_load_files\/areas\/areas11_pstress\/img_OZAWA.jpg\" alt=\"\" width=\"230\" height=\"146\"><\/a><p class=\"wp-caption-text\">Three-dimensional structure of the light-harvesting antenna complex.<\/p><\/div>\n<p>The light-harvesting antenna proteins in chloroplasts are large protein complexes that efficiently capture light energy for photosynthesis. We are studying how this protein complex achieves highly efficient light harvesting using various experimental techniques, including analysis of post-translational modifications for each component and three-dimensional structural analysis of the entire complex.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<table class=\"el_table_fix\" style=\"width: 100%\">\n<tbody>\n<tr>\n<th style=\"width: 20%\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium\" src=\"https:\/\/www.elst.okayama-u.ac.jp\/up_load_files\/areas\/areas11_pstress\/Okegawa Yuki.jpg\" width=\"320\" height=\"408\"><\/th>\n<td style=\"width: 80%\">\n<ul>\n<li style=\"list-style-type: none;font-size: 12px;margin-left: -20px\"><span style=\"font-size: 12pt\">Assoc. Prof. OKEGAWA Yuki<\/span><\/li>\n<li style=\"list-style-type: none;font-size: 12px;margin-left: -20px\"><span style=\"font-size: 12pt\">E-mail\uff1aokegawa<span style=\"color: #0000ff\"> [at]<\/span> okayama-u.ac.jp<\/span><\/li>\n<li style=\"list-style-type: none;font-size: 12px;margin-left: -20px\"><span style=\"font-size: 12pt\">Keywords : Photosynthetic electron transport \/ Redox regulation\n<p><\/span><\/li>\n<\/ul>\n<p><span style=\"font-size: 12pt\"><a class=\"el_linkBtn\" href=\"https:\/\/soran.cc.okayama-u.ac.jp\/html\/306fa993884078de587ce9df1975c665_en.html\">Directory of Researchers<\/a>&nbsp;<\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h5>&nbsp;<\/h5>\n<div style=\"width: 240px\" class=\"wp-caption alignright\"><a href=\"https:\/\/www.elst.okayama-u.ac.jp\/up_load_files\/areas\/areas11_pstress\/img_Okegawa.png\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.elst.okayama-u.ac.jp\/up_load_files\/areas\/areas11_pstress\/img_Okegawa.png\" alt=\"\" width=\"230\" height=\"146\"><\/a><p class=\"wp-caption-text\">Arabidopsis thaliana unable to cope with fluctuating light environment (left: wild type, right: mutant)<\/p><\/div>\n<p>In response to fluctuating light conditions, plants strictly regulate the redox condition in the chloroplasts. This chloroplastic redox state directly impacts electron transport in photosynthesis and is crucial in efficient photosynthetic reactions. We have identified novel proteins that regulate the redox state in the chloroplasts and are investigating how plants adapt to fluctuating light environments.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Plant Genetics and Physiology Our life on earth cannot continue without the atmospheric environment, which is  [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":0,"parent":150,"menu_order":192,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-468","page","type-page","status-publish","hentry"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"Plant Genetics and Physiology Our life on earth cannot\" \/>\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<link rel=\"canonical\" href=\"https:\/\/www.elst.okayama-u.ac.jp\/en\/education\/mc-chikyu\/areas11_pstress\/\" \/>\n\t<meta name=\"generator\" 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