
{"id":3085,"date":"2019-08-01T15:05:46","date_gmt":"2019-08-01T15:05:46","guid":{"rendered":"https:\/\/www.editage.com\/insights\/scientists-crack-the-code-to-improve-stress-tolerance-in-plants\/"},"modified":"2025-01-15T06:32:53","modified_gmt":"2025-01-15T06:32:53","slug":"scientists-crack-the-code-to-improve-stress-tolerance-in-plants","status":"publish","type":"post","link":"https:\/\/www.editage.com\/insights\/scientists-crack-the-code-to-improve-stress-tolerance-in-plants","title":{"rendered":"Scientists crack the code to improve stress tolerance in plants"},"content":{"rendered":"<p style=\"text-align:justify; margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"text-justify:inter-ideograph\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span style=\"font-family:&quot;Calibri&quot;,sans-serif\">In any eukaryotic organism, the DNA in a cell exists not as a loose strand, but as a highly condensed complex that consists of DNA and other proteins known as histones. Overall, this condensed structure is referred to as chromatin, and this packaging is important for maintaining the integrity of DNA structure and sequence. However, as chromatin restricts the topology of DNA, modification of chromatin (via modification of histones) is an important form of regulation of genes and is referred to as epigenetic regulation. Now, a group of scientists, led by Prof\u00a0Sachihiro Matsunaga from Tokyo University of Science, has uncovered a novel epigenetic regulation mechanism, at the center of which lies a histone demethylase enzyme called <i>lysine-specific demethylase 1-like 1<\/i> (LDL1). Prof Matsunaga states, \u201cThe novel mechanism of epigenetic regulation that we found is related to DNA damage repair in plants, and we believe that it has a lot of real-world applications.\u201d This study is published in <\/span><a href=\"http:\/\/www.plantphysiol.org\/content\/early\/2019\/07\/31\/pp.19.00530\" style=\"color:blue; text-decoration:underline\"><span style=\"background:white\"><span style=\"font-family:&quot;Calibri&quot;,sans-serif\">Plant Physiology<\/span><\/span><\/a><span style=\"font-family:&quot;Calibri&quot;,sans-serif\">.<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"text-justify:inter-ideograph\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\">\u00a0<\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"text-justify:inter-ideograph\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span style=\"font-family:&quot;Calibri&quot;,sans-serif\">An organism\u2019s genome is constantly subjected to various stresses that cause instabilities or errors in it, resulting in damages or \u201cbreaks\u201d in the sequences. These breaks are repaired autonomously by a process called homologous recombination (HR), and thus, HR is essential for maintaining the stability of a genome. Like for all other genetic regulatory processes, the chromatin structure needs to be modified for HR to occur smoothly. Prof Matsunaga and team had previously discovered a conserved protein called RAD54; they found that RAD54 is involved in chromatin remodeling in the model plant <i>Arabidopsis<\/i> and thus aids in genomic stability and response to DNA damage. However, both the recruitment of RAD54 at the site of HR and the proper dissociation of RAD54 from the site are important for it exert its effects. When asked about their motivation for this study, Prof Matsunaga candidly states \u201cOur previous study identified that RAD54 aids HR but the mechanisms of recruitment and dissociation were poorly understood. Our new study attempts to shed light on these mechanisms.\u201d<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\">\u00a0<\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"text-justify:inter-ideograph\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span style=\"font-family:&quot;Calibri&quot;,sans-serif\">Using techniques such as co-immunoprecipitation and mass spectrometry, the scientists first identified and shortlisted proteins that interact with RAD54 and regulate its dynamics with chromatin during HR-based DNA damage repair in <i>Arabidopsis<\/i>. They then identified, for the first time, that the histone demethylase LDL1 interacts with RAD54 at DNA damage sites. They found that RAD54 specifically interacts with the methylated fourth\u00a0lysine amino acid on one of the four core histones in the chromatin, H3 (H3K4me2). The scientists then found that LDL1 suppresses this interaction by demethylating H3K4me2. They concluded that LDL1 removes excess of RAD54 from DNA damage sites <i>via<\/i> the demethylation of H3K4me2 and thus promotes HR repair in <i>Arabidopsis<\/i>. Thus, LDL1 ensures proper dissociation of RAD54 from the HR repair site in the DNA. <\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\">\u00a0<\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"text-justify:inter-ideograph\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span style=\"font-family:&quot;Calibri&quot;,sans-serif\">Hailing this exciting result, Prof Matsunaga says, \u201cThis finding is an important addition to plant science as well as basic molecular biology. This is an extension of our previous research that showed that RAD54 accumulated in damaged sites in <i>Arabidopsis<\/i> and that excessive RAD54 suppresses damage repair, which could be dangerous to the plant. Our new study shows that LDL1 aids and improves DNA damage repair by removing RAD54 from the damaged site.\u201d<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\">\u00a0<\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"text-justify:inter-ideograph\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span style=\"font-family:&quot;Calibri&quot;,sans-serif\">So, why are the findings of this study so important? Prof. Matsunaga explains this, too. \u201cUnlike animals, plants are stationary and, therefore, more vulnerable to environmental stresses such as high temperatures, dryness, pathogens, parasites, and poor soil conditions,\u201d says Prof. Matsunaga, \u201cand these stresses suppress the development and growth of plants by causing DNA damage. Therefore, an efficient DNA damage response is crucial to ensure optimum growth and survival of plants. Our study reveals one possible epigenetic regulation mechanism that can improve the DNA damage response in plants.\u201d<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\">\u00a0<\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"text-justify:inter-ideograph\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span style=\"font-family:&quot;Calibri&quot;,sans-serif\">Finally, Prof Matsunaga touches upon the most important application of this group\u2019s research. \u201cPlants can be treated with LDL1 to artificially control epigenetic modification so that they become more tolerant to stresses such as infections, environmental stresses and mechanical stress,\u201d says Prof. Matsunaga. \u201cWe think that this will be useful in creating resistant varieties of crop plants with improved growth and longevity and better characteristics, thus contributing to global food security.\u201d\u00a0 \u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"text-justify:inter-ideograph\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\">\u00a0\u00a0 <\/span><\/span><\/span><\/p>\n<p style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><b><span style=\"font-family:&quot;Calibri&quot;,sans-serif\">Reference<\/span><\/b><\/span><\/span><\/p>\n<table class=\"Table\" style=\"border-collapse:collapse; border:solid windowtext 1.0pt\">\n<tbody>\n<tr>\n<td style=\"border:solid windowtext 1.0pt; width:130.5pt; padding:0in 0in 0in 0in\" valign=\"top\" width=\"174\">\n<p style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span style=\"font-family:&quot;Calibri&quot;,sans-serif\">Title\u00a0of <\/span><span style=\"font-family:&quot;Calibri&quot;,sans-serif\">original<\/span><span style=\"font-family:&quot;Calibri&quot;,sans-serif\"> paper:<\/span><\/span><\/span><\/p>\n<\/td>\n<td style=\"border:solid windowtext 1.0pt; width:320.8pt; border-left:none; padding:0in 0in 0in 0in\" valign=\"top\" width=\"428\">\n<p style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span style=\"font-family:&quot;Calibri&quot;,sans-serif\">LSD1-LIKE1-mediated H3K4me2 demethylation is required for homologous recombination repair<\/span><\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"border:solid windowtext 1.0pt; width:130.5pt; border-top:none; padding:0in 0in 0in 0in\" valign=\"top\" width=\"174\">\n<p style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span style=\"font-family:&quot;Calibri&quot;,sans-serif\">Journal:<\/span><\/span><\/span><\/p>\n<\/td>\n<td style=\"border-bottom:solid windowtext 1.0pt; width:320.8pt; border-top:none; border-left:none; border-right:solid windowtext 1.0pt; padding:0in 0in 0in 0in\" valign=\"top\" width=\"428\">\n<p style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><i><span style=\"font-family:&quot;Calibri&quot;,sans-serif\">Plant Physiology<\/span><\/i><\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<tr>\n<td style=\"border:solid windowtext 1.0pt; width:130.5pt; border-top:none; padding:0in 0in 0in 0in\" valign=\"top\" width=\"174\">\n<p style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span style=\"font-family:&quot;Calibri&quot;,sans-serif\">DOI:<\/span><\/span><\/span><\/p>\n<\/td>\n<td style=\"border-bottom:solid windowtext 1.0pt; width:320.8pt; border-top:none; border-left:none; border-right:solid windowtext 1.0pt; padding:0in 0in 0in 0in\" valign=\"top\" width=\"428\">\n<p style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span class=\"MsoHyperlink\" style=\"color:blue\"><span style=\"text-decoration:underline\"><span style=\"background:white\"><span style=\"font-family:&quot;Calibri&quot;,sans-serif\"><a href=\"https:\/\/doi.org\/10.1104\/pp.19.00530\" style=\"color:blue; text-decoration:underline\">https:\/\/doi.org\/10.1104\/pp.19.00530<\/a><\/span><\/span><\/span><\/span><\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p class=\"Default\" style=\"margin:0in 0in 0.0001pt\">\u00a0<\/p>\n<p class=\"Default\" style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"font-family:Calibri,sans-serif\"><span style=\"color:black\"><b>About<\/b><b>\u00a0Tokyo University of Science<\/b><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"text-justify:inter-ideograph\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span style=\"font-family:&quot;Calibri&quot;,sans-serif\"><a href=\"http:\/\/https:\/\/www.tus.ac.jp\/en\/\">Tokyo University of Science<\/a> (TUS) is a well-known and respected university, and the largest science-specialized private research university in Japan, with four campuses in central Tokyo and its suburbs and in Hokkaido. Established in 1881, the university has continually contributed to Japan&#8217;s development in science through inculcating the love for science in researchers, technicians, and educators. <\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"text-justify:inter-ideograph\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\">\u00a0<\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"text-justify:inter-ideograph\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span style=\"font-family:&quot;Calibri&quot;,sans-serif\">With a mission of \u201cCreating science and technology for the harmonious development of nature, human beings, and society&#8221;, TUS has undertaken a wide range of research from basic to applied science. TUS has embraced a multidisciplinary approach to research and undertaken intensive study in some of today&#8217;s most vital fields. TUS is a meritocracy where the best in science is recognized and nurtured. It is the only private university in Japan that has produced a Nobel Prize winner and the only private university in Asia to produce Nobel Prize winners within the natural sciences field. <\/span><\/span><\/span><\/span><\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\">\u00a0<\/p>\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"font-family:Calibri,sans-serif\"><span style=\"color:black\"><b>About Professor <\/b><b>Sachihiro Matsunaga<\/b><b> from Tokyo University of Science<\/b><\/span><\/span><\/span><\/p>\n<p class=\"Default\" style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"font-family:Calibri,sans-serif\"><span style=\"color:black\">Dr. Sachihiro Matsunaga is a Professor of Applied Biological Science in the Faculty of Science &amp; Technology at the Tokyo University of Science. A respected and senior researcher, he has more than 150 research publications to his credit. He is also the corresponding author of this paper. His chief areas of interest include epigenetics, plant genetics, plant stress tolerance, agricultural science, and plant biotechnology.<\/span><\/span><\/span><\/p>\n<p class=\"Default\" style=\"margin:0in 0in 0.0001pt\">\u00a0<\/p>\n<p class=\"Default\" style=\"margin:0in 0in 0.0001pt\">\u00a0<\/p>\n<table class=\"MsoTableGrid\" style=\"margin-left:-4.5pt; border-collapse:collapse; border:undefined\">\n<tbody>\n<tr>\n<td style=\"width:130.25pt; padding:0in 5.4pt 0in 5.4pt\" valign=\"top\" width=\"174\">\n<p style=\"text-align:justify; margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"text-justify:inter-ideograph\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><b><span lang=\"EN-GB\" style=\"font-family:&quot;Calibri&quot;,sans-serif\" xml:lang=\"EN-GB\">Media contact<\/span><\/b><\/span><\/span><\/span><\/p>\n<\/td>\n<td style=\"width:320.55pt; padding:0in 5.4pt 0in 5.4pt\" valign=\"top\" width=\"427\">\n<p style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span lang=\"EN-GB\" style=\"font-family:&quot;Calibri&quot;,sans-serif\" xml:lang=\"EN-GB\">Tsutomu Shimizu <\/span><\/span><\/span><\/p>\n<p style=\"margin:0in 0in 0.0001pt\"><span style=\"font-size:12pt\"><span style=\"font-family:&quot;Times New Roman&quot;,serif\"><span lang=\"EN-GB\" style=\"font-family:&quot;Calibri&quot;,sans-serif\" xml:lang=\"EN-GB\">Email: <span class=\"MsoHyperlink\" style=\"color:blue\"><span style=\"text-decoration:underline\"><a href=\"mailto:mediaoffice@admin.tus.ac.jp\" style=\"color:blue; text-decoration:underline\">mediaoffice@admin.tus.ac.jp<\/a><\/span><\/span><\/span><\/span><\/span><\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"<p>In any eukaryotic organism, the DNA in a cell exists not as a loose strand, but as a highly condensed complex that consists of DNA and other proteins known as histones. Overall, this condensed structure is referred to as chromatin, and this packaging is important for maintaining the integrity of DNA structure and sequence. However, [&hellip;]<\/p>\n","protected":false},"author":1152,"featured_media":33313,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"inline_featured_image":false,"footnotes":""},"categories":[2435],"tags":[2482],"new_categories":[],"new_tags":[],"series":[],"class_list":["post-3085","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-trending-research","tag-science-update"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v25.0 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Scientists crack the code to improve stress tolerance in plants | Editage Insights<\/title>\n<meta name=\"description\" content=\"A group of scientists from Tokyo University of Science reveal\u00a0an epigenetic regulation mechanism that is involved in DNA damage repair in plants, thereby suggesting a possibility of reinforcing global food security.\u00a0\" 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