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研究发现对β-三酮类除草剂具有广谱抗性的水稻基因
作者:小柯机器人 发布时间:2019/7/30 15:47:54

日本埼玉大学Yuzuru Tozawa教授牵头的联合研究小组发现了一种水稻基因,该基因赋予了水稻对β-三酮类除草剂的广谱抗性。该项研究成果发表在2019年7月26日出版的《科学》上。

联合研究人员确定了一种水稻基因HIS1(HPPD抑制剂敏感1),它赋予对苯并双环(BBC)和其他β-三酮类除草剂的抗性。研究团表明,HIS1编码了二价铁(II) /2-氧戊二酸依赖性加氧酶,其通过催化它们的羟基化来解毒该类除草剂。谱系分析显示,对BBC敏感的水稻品种从一个籼稻品种遗传了一个功能失调的his1等位基因。拟南芥中强制表达了HIS1基因后,不仅赋予了拟南芥对BBC的抗性,同时能够抗β-三酮类除草剂。因此,HIS1基因可能被证明对培育抗除草剂作物有重要贡献。

研究人员表示,水稻品种的遗传变异品种丰富,这为水稻育种改良提供了大量资源。一些水稻品种对BBC敏感,BBC是一种有效额4-羟基苯丙酮酸双加氧酶(HPPD)的β-三酮类除草剂。

附:英文原文

Title: A rice gene that confers broad-spectrum resistance to β-triketone herbicides

Author: Hideo Maeda, Kazumasa Murata, Nozomi Sakuma, Satomi Takei, Akihiko Yamazaki, Md. Rezaul Karim, Motoshige Kawata, Sakiko Hirose, Makiko Kawagishi-Kobayashi, Yojiro Taniguchi, Satoru Suzuki, Keisuke Sekino, Masahiro Ohshima, Hiroshi Kato, Hitoshi Yoshida, Yuzuru Tozawa

Issue&Volume:Vol 365 Issue 6451

Abstract: The genetic variation of rice cultivars provides a resource for further varietal improvement through breeding. Some rice varieties are sensitive to benzobicyclon (BBC), a β-triketone herbicide that inhibits 4-hydroxyphenylpyruvate dioxygenase (HPPD). Here we identify a rice gene, HIS1 (HPPD INHIBITOR SENSITIVE 1), that confers resistance to BBC and other β-triketone herbicides. We show that HIS1 encodes an Fe(II)/2-oxoglutarate–dependent oxygenase that detoxifies β-triketone herbicides by catalyzing their hydroxylation. Genealogy analysis revealed that BBC-sensitive rice variants inherited a dysfunctional his1 allele from an indica rice variety. Forced expression of HIS1 in Arabidopsis conferred resistance not only to BBC but also to four additional β-triketone herbicides. HIS1 may prove useful for breeding herbicide-resistant crops.

DOI: 10.1126/science.aax0379

Source:https://science.sciencemag.org/content/365/6451/393

期刊信息
Science:《科学》,创刊于1880年。隶属于美国科学促进会,最新IF:41.037