Molecular mechanisms and future improvement of submergence tolerance in rice
Molecular mechanisms and future improvement of submergence tolerance in rice
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DOI：
10.1007/s11032-020-01122-y
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发表时间：
2020-04-14
影响因子：
3.1
通讯作者：
Ashikari, Motoyuki
中科院分区：
文献类型：
--
作者：
Kuroha, Takeshi;Ashikari, Motoyuki
水稻是世界上最重要的粮食作物之一，也是禾谷类作物中育种技术最先进的作物。一般来说，水稻生长在低地和洪水易发地区，因为它能够在半水生环境中生存。为了适应过量水分条件，水稻发展了专门的解剖和形态特征，如通气组织、径向氧损失屏障、不定根和叶片气膜形成能力。然而，这些策略不足以在连续完全淹没下生存，这会导致因缺氧而死亡。为了克服长时间的淹没，一些亚洲水稻品种进一步发展了其他性状，如需氧发芽，叶片伸长的静止响应山洪暴发，和节间伸长周期性洪水。本文综述了水稻耐淹性的分子机制和遗传因子的研究进展。
Rice is one of most important crops in the world and is also the most advanced crop for breeding among cereal crops. Generally, rice is grown in lowland and flood-prone areas due to its ability to survive in semiaquatic environments. To adapt to excess water conditions, rice has developed specialized anatomical and morphological traits such as aerenchyma, radial oxygen loss barriers, adventitious roots, and leaf gas film formation ability. However, these strategies are insufficient for survival under continuous complete submergence, which leads to death due to oxygen starvation. To overcome prolonged submergence, some Asian rice varieties have further developed additional traits such as aerobic germination, quiescence of leaf elongation in response to flash floods, and internode elongation under periodic flooding. In this review, we describe recent progress in the understanding of the various molecular mechanisms and genetic factors regulating flooding tolerance in rice.