The ethylene response factors SNORKEL1 and SNORKEL2 allow rice to adapt to deep water

被引:756
作者
Hattori, Yoko [1 ]
Nagai, Keisuke [1 ]
Furukawa, Shizuka [1 ]
Song, Xian-Jun [1 ]
Kawano, Ritsuko [3 ]
Sakakibara, Hitoshi [4 ]
Wu, Jianzhong [5 ]
Matsumoto, Takashi [5 ]
Yoshimura, Atsushi [3 ]
Kitano, Hidemi [1 ]
Matsuoka, Makoto [1 ]
Mori, Hitoshi [2 ]
Ashikari, Motoyuki [1 ]
机构
[1] Nagoya Univ, Biosci & Biotechnol Ctr, Nagoya, Aichi 4648601, Japan
[2] Nagoya Univ, Grad Sch Bioagr Sci, Nagoya, Aichi 4648601, Japan
[3] Kyushu Univ, Sch Agr, Fukuoka 8128581, Japan
[4] RIKEN, Plant Sci Ctr, Yokohama, Kanagawa 2300045, Japan
[5] Natl Inst Agrobiol Resources, Tsukuba, Ibaraki 3058602, Japan
基金
日本学术振兴会;
关键词
SUBMERGENCE TOLERANCE; INTERNODE ELONGATION; GROWTH-RESPONSE; FLOATING RICE; ABSCISIC-ACID; GRAIN WIDTH; MAJOR QTL; GIBBERELLIN; GENE; AGROBACTERIUM;
D O I
10.1038/nature08258
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Living organisms must acquire new biological functions to adapt to changing and hostile environments. Deepwater rice has evolved and adapted to flooding by acquiring the ability to significantly elongate its internodes, which have hollow structures and function as snorkels to allow gas exchange with the atmosphere, and thus prevent drowning(1-3). Many physiological studies have shown that the phytohormones ethylene, gibberellin and abscisic acid are involved in this response(4-8), but the gene(s) responsible for this trait has not been identified. Here we show the molecular mechanism of deepwater response through the identification of the genes SNORKEL1 and SNORKEL2, which trigger deepwater response by encoding ethylene response factors involved in ethylene signalling. Under deepwater conditions, ethylene accumulates in the plant and induces expression of these two genes. The products of SNORKEL1 and SNORKEL2 then trigger remarkable internode elongation via gibberellin. We also demonstrate that the introduction of three quantitative trait loci from deepwater rice into non-deepwater rice enabled the latter to become deepwater rice. This discovery will contribute to rice breeding in lowland areas that are frequently flooded during the rainy season.
引用
收藏
页码:1026 / U116
页数:6
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