期刊
NATURE GENETICS
卷 45, 期 9, 页码 1097-+出版社
NATURE PORTFOLIO
DOI: 10.1038/ng.2725
关键词
-
资金
- Ministry of Agriculture, Forestry and Fisheries of Japan [QTL-4003, RBS-2009]
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.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据