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Nature Communications:稗草基因组分析揭示其广泛适应性机制

已有 5552 次阅读 2017-10-20 08:44 |个人分类:每日摘要|系统分类:论文交流|关键词:学者

Echinochloa crus-galli genome analysis provides insight into its adaptation and invasiveness as a weed


First author:Longbiao Guo; Affiliations: Zhejiang University (浙江大学): Hangzhou, China

Corresponding author: Longjiang Fan (樊龙江)


Barnyardgrass (Echinochloa crus-galli; 稗草) is a pernicious (有害的) weed (杂草) in agricultural fields (农业领域) worldwide. The molecular mechanisms underlying its success in the absence of human intervention (人为干涉) are presently unknown. Here we report a draft genome sequence of the hexaploid (六倍体的) species E. crus-galli, i.e., a 1.27 Gb assembly representing 90.7% of the predicted genome size. An extremely large repertoire of genes encoding cytochrome (细胞色素) P450 monooxygenases (单加氧酶) and glutathione S-transferases (谷胱甘肽硫转移酶) associated with detoxification (解毒) are found. Two gene clusters involved in the biosynthesis of an allelochemical (化感物质) 2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one (DIMBOA; 2,4-二羟基-7-甲氧基-(2H)-1,4-苯并噁嗪-3(4H)-酮) and a phytoalexin (植物抗毒素) momilactone A (稻内酯A) are found in the E. crus-galli genome, respectively. The allelochemical DIMBOA gene cluster is activated in response to co-cultivation (共栽培) with rice, while the phytoalexin momilactone A gene cluster specifically to infection by pathogenic Pyricularia oryzae (稻瘟病菌). Our results provide a new understanding of the molecular mechanisms underlying the extreme adaptation of the weed.


稗草是世界范围上农业领域有害的杂草。对于其在缺少人为干涉的情况下广泛分布全球的分子机制还不清楚。本文报道了六倍体稗草的基因组草图,基因组组装大小1.27 Gb,占预估基因组的90.7%。作者鉴定到了与解毒相关的细胞色素P450单加氧酶和谷胱甘肽硫转移酶基因家族。另外,参与化感物质DIMBOA和植物抗毒素稻内酯A的生物合成的基因也被鉴定出来。化感物质DIMBOA相关基因在与水稻共栽培时激活,植物抗毒素稻内酯A相关基因特异响应于稻瘟病菌的侵染。本文的研究为理解稗草的极端适应潜在的分子机制提供新的见解。


通讯:樊龙江 (http://mypage.zju.edu.cn/0089128)


研究方向主要开展结构基因组和表观基因组学研究。具体研究内容包括(1)作物及其野生资源基因组组装分析、作物育种选择的分子机制和组学数据的育种利用;(2)表观遗传非编码RNA预测方法及其功能;(3)基于组学数据的人类健康、饮食和疾病的生物信息学评价方法。本实验室为浙江大学作物科学研究所、生物信息学研究所、IBM生物计算实验室和空气污染与健康研究中心重要组成部分。


doi: 10.1038/s41467-017-01067-5


Journal: Nature Communications
Published online: October 18, 2017.

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