{"id":995,"date":"2017-12-20T17:00:40","date_gmt":"2017-12-20T09:00:40","guid":{"rendered":"https:\/\/www.agrinoon.com\/agriculture\/?p=995"},"modified":"2017-12-20T17:00:40","modified_gmt":"2017-12-20T09:00:40","slug":"chinese-scientists-reveal-novel-signaling-pathway-chilling-tolerance-rice","status":"publish","type":"post","link":"https:\/\/www.agrinoon.com\/agriculture\/2017\/12\/20\/chinese-scientists-reveal-novel-signaling-pathway-chilling-tolerance-rice\/","title":{"rendered":"Chinese scientists reveal a novel signaling pathway for chilling tolerance in rice"},"content":{"rendered":"<div class=\"post-content\">Keywords:\u00a0China, Signaling pathway, Chilling tolerance, Rice<\/div>\n<div id=\"detailbox\" class=\"post-content\">The ability of plants to tolerate chilling stress is fundamental in determining the growing season and geographical distribution of plants. Local temperature anomalies caused by global climate change directly threaten crop production.<br data-filtered=\"filtered\" \/><br data-filtered=\"filtered\" \/><\/div>\n<div class=\"post-content\">Improvement of chilling tolerance in rice varieties requires clarifying the regulatory mechanisms of chilling signaling pathways.<br data-filtered=\"filtered\" \/><br data-filtered=\"filtered\" \/><\/div>\n<div class=\"post-content\">The primary signal transduction pathway of chilling tolerance in rice has been established already. \u00a0But how the diverse components are regulated is not clear.<br data-filtered=\"filtered\" \/><br data-filtered=\"filtered\" \/><\/div>\n<div class=\"post-content\">OsbHLH002 is one of more than 100 members of the bHLH transcription factor family in rice. It has the highest homology with Arabidopsis ICE1 protein. ICE1 is one of the core members in the cold signaling pathway in Arabidopsis (hence OsbHLH002 is also called OsICE1).<br data-filtered=\"filtered\" \/><br data-filtered=\"filtered\" \/><\/div>\n<div class=\"post-content\">The research team was led by Prof. CHONG Kang. He is from the Institute of Botany of the Chinese Academy of Sciences. It has revealed a new mechanism for chilling tolerance mediated by OsMAPK3-OsbHLH002-OsTPP1 in rice.<br data-filtered=\"filtered\" \/><br data-filtered=\"filtered\" \/><\/div>\n<div class=\"post-content\">The research team had shown in 2009 that overexpression of the wild rice gene OrbHLH2 enhanced tolerance to osmotic stress in Arabidopsis.<br data-filtered=\"filtered\" \/><br data-filtered=\"filtered\" \/><\/div>\n<div class=\"post-content\">This time they discovered that the cold-activated protein kinase OsMAPK3 phosphorylates the transcription factor OsbHLH002\/OsICE1 directly to enhance its transactivation activity.<br data-filtered=\"filtered\" \/><br data-filtered=\"filtered\" \/><\/div>\n<div class=\"post-content\">Moreover, OsMAPK3 attenuated the interaction between OsbHLH002 and E3 ubiquitin ligase OsHOS1. It led to reduced ubiquitination and degradation of OsbHLH002.<br data-filtered=\"filtered\" \/><br data-filtered=\"filtered\" \/><\/div>\n<div class=\"post-content\">The increase of the protein content and transactivation activity of OsbHLH002 effectively activates the expression of OsTPP1 (encoding trehalose-6-phosphatase) to promote the hydrolysis of trehalose-6-phosphate, increasing the trehalose content and enhancing the chilling tolerance of rice.<br data-filtered=\"filtered\" \/><br data-filtered=\"filtered\" \/><\/div>\n<div class=\"post-content\">These results established a novel pathway OsMAPK3-OsbHLH002-OsTPP1. This pathway transduces the cold signal from the kinase cascade system to the nucleus and promotes synthesis of an osmotic protectant to regulate the chilling tolerance in rice.<br data-filtered=\"filtered\" \/><br data-filtered=\"filtered\" \/><\/div>\n<div class=\"post-content\">This finding has been published in <em>Developmental Cell. \u00a0 The\u00a0<\/em>article entitled &#8220;OsMAPK3 Phosphorylates OsbHLH002\/OsICE1 and Inhibits Its Ubiquitination to Activate OsTPP1 and Enhances Rice Chilling Tolerance.&#8221;<br data-filtered=\"filtered\" \/><br data-filtered=\"filtered\" \/><\/div>\n<div class=\"post-content\">The study was supported by the Chinese Ministry of Agriculture, the Chinese Academy of Sciences and the National Natural Science Foundation of China.<br data-filtered=\"filtered\" \/><br data-filtered=\"filtered\" \/><\/div>\n<div class=\"post-meta\"><b>Source:\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0\u00a0<\/b>CHINESE ACADEMY OF SCIENCES<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Keywords:\u00a0China, Signaling pathway, Chilling tolerance, Rice The ability of plants to tolerate chilling stress is fundamental in determining the growing season and geographical distribution of plants. Local temperature anomalies caused by global climate change directly threaten crop production. Improvement of chilling tolerance in rice varieties requires clarifying the regulatory mechanisms of chilling signaling pathways. The&hellip; <a class=\"more-link\" href=\"https:\/\/www.agrinoon.com\/agriculture\/2017\/12\/20\/chinese-scientists-reveal-novel-signaling-pathway-chilling-tolerance-rice\/\">Continue reading <span class=\"screen-reader-text\">Chinese scientists reveal a novel signaling pathway for chilling tolerance in rice<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[],"class_list":["post-995","post","type-post","status-publish","format-standard","hentry","category-industry-news","entry"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v21.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Chinese scientists reveal a novel signaling pathway for chilling tolerance in rice - agrinoon<\/title>\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.agrinoon.com\/agriculture\/2017\/12\/20\/chinese-scientists-reveal-novel-signaling-pathway-chilling-tolerance-rice\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Chinese scientists reveal a novel signaling pathway for chilling tolerance in rice - agrinoon\" \/>\n<meta property=\"og:description\" content=\"Keywords:\u00a0China, Signaling pathway, Chilling tolerance, Rice The ability of plants to tolerate chilling stress is fundamental in determining the growing season and geographical distribution of plants. 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Local temperature anomalies caused by global climate change directly threaten crop production. Improvement of chilling tolerance in rice varieties requires clarifying the regulatory mechanisms of chilling signaling pathways. 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