Control of root system architecture by DEEPER ROOTING 1 increases rice yield under drought conditions

被引：1128

作者：

Uga, Yusaku ^{[1
]}

Sugimoto, Kazuhiko ^{[1
]}

Ogawa, Satoshi ^{[2
,3
]}

Rane, Jagadish ^{[2
]}

Ishitani, Manabu ^{[2
]}

Hara, Naho ^{[1
]}

Kitomi, Yuka ^{[4
]}

Inukai, Yoshiaki ^{[4
]}

Ono, Kazuko ^{[1
]}

Kanno, Noriko ^{[1
]}

Inoue, Haruhiko ^{[1
]}

Takehisa, Hinako ^{[1
]}

Motoyama, Ritsuko ^{[1
]}

Nagamura, Yoshiaki ^{[1
]}

Wu, Jianzhong ^{[1
]}

Matsumoto, Takashi ^{[1
]}

Takai, Toshiyuki ^{[5
]}

Okuno, Kazutoshi ^{[1
]}

Yano, Masahiro ^{[1
]}

机构：

[1] Natl Inst Agrobiol Sci, Tsukuba, Ibaraki, Japan

[2] Int Ctr Trop Agr CIAT, Cali, Colombia

[3] Univ Valle, Fac Sci, Cali, Colombia

[4] Nagoya Univ, Grad Sch Bioagr Sci, Nagoya, Aichi 4648601, Japan

[5] Natl Inst Crop Sci, Tsukuba, Ibaraki, Japan

来源：

NATURE GENETICS | 2013年 / 45卷 / 09期

关键词：

AUXIN RESPONSE FACTOR; ORYZA-SATIVA L; GENE FAMILY; EXPRESSION; GROWTH; IDENTIFICATION; FIELD; PHYTOHORMONE; AVOIDANCE; TRANSPORT;

D O I：

10.1038/ng.2725

中图分类号：

Q3 [遗传学];

学科分类号：

071007 ; 090102 ;

摘要：

The genetic improvement of drought resistance is essential for stable and adequate crop production in drought-prone areas(1). Here we demonstrate that alteration of root system architecture improves drought avoidance through the cloning and characterization of DEEPER ROOTING 1 (DRO1), a rice quantitative trait locus controlling root growth angle. DRO1 is negatively regulated by auxin and is involved in cell elongation in the root tip that causes asymmetric root growth and downward bending of the root in response to gravity. Higher expression of DRO1 increases the root growth angle, whereby roots grow in a more downward direction. Introducing DRO1 into a shallow-rooting rice cultivar by backcrossing enabled the resulting line to avoid drought by increasing deep rooting, which maintained high yield performance under drought conditions relative to the recipient cultivar. Our experiments suggest that control of root system architecture will contribute to drought avoidance in crops.

引用

页码：1097 / +

页数：9

共 51 条

[1] Physiol-morphological analysis on axile root growth in upland rice [J].