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| 1 | Flooding Tolerance in Rice:Focus on Mechanisms and Approaches显示文摘Flooding is one of the most hazardous natural disasters and a major stress constraint to rice production throughout the world,which results in huge economic loss.Approximately one-fourth of the global rice crops(approximately 40 million hectares)are grown in rainfed lowland plots that are prone to seasonal flooding.A great progress has been made during last two decades in our understanding of the mechanisms involved in adaptation and tolerance to flooding/submergence in rice.In this review,we summarized the physiological and molecular mechanisms that contribute to tolerance of flooding/submergence in rice.We also covered various features of flooding stress with special reference to rice plants,viz.different types of flooding stress,environmental characterisation of flood water,impact of flooding stress on rice plant and their morphological,physiological and metabolic responses under flooding.A brief discussion on the tolerance mechanism in rice exhibited to different types of flooding will be focused for the future crop improvement programme for development of flooding tolerant rice variety. | Debabrata Panda Jijnasa Barik | 2021 | Rice science2021，28，1： | 3 |
| 2 | 华南稻区不同水稻品种耐淹出苗能力及秧苗素质比较显示文摘【目的】评价不同水稻品种淹水直播方式下的耐淹出苗能力以及淹后的秧苗素质。【方法】以前期初筛获得的11份耐淹性水稻种质资源为材料,进行大田淹水直播(淹水5 cm)处理,以湿润直播作为对照,研究淹水直播条件下的出苗率、秧苗期的单株分蘖数、株高、茎高、叶龄、根冠比等主要秧苗素质,比较分析了不同水稻品种对淹水直播的出苗率以及农艺性状的响应差异。以淹水直播和湿润直播条件下各农艺性状为基础数据,对秧苗期的秧苗素质进行比较。【结果】淹水直播对出苗率和秧苗期的根冠比影响较大,出苗率可作为评价淹水直播条件下耐淹出苗能力的重要指标。以出苗率作聚类分析评价各品种的耐淹出苗能力,筛选出吊黎望、朝安龙眼两个耐淹出苗能力强的材料。淹水直播25 d后,各品种秧苗期的单株分蘖数、叶龄减少,根冠比增加,株高和茎高则表现为耐淹出苗能力强的品种呈降低趋势,而耐淹出苗能力弱的品种则相反。【结论】淹水直播显著影响直播稻的出苗率,影响水稻秧苗期的农艺性状,其中对秧苗期根冠比的影响最大。 | 伍龙梅 张彬 黄庆 邹积祥 李惠芬 包晓哲 杨陶陶 张悦 陈青春 | 2021 | 广东农业科学2021，48，10： | 2 |
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