The role of pollen starch accumulation in responses of wheat to water stress and film antitranspirant

花粉淀粉积累在小麦对水分胁迫和膜抗蒸腾剂响应中的作用

• 批准号: 2432366
• 金额: --
• 依托单位: Harper Adams University
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2020
• 资助国家: 英国
• 起止时间: 2020 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2432366
• 关键词: role; pollen; starch; accumulation; responses

Drought is one of the major abiotic factors, responsible for reduced wheat yields across the globe and is one of the main concerns for the world's food security. With the prediction of more extreme weather conditions in the future, a better understanding of how water stress affects the wheat crop is becoming more crucial. Studies indicated that drought stress is a significant cause of pollen sterility and affects pollen development which could ultimately result in lower crop yield (Dong et al. 2017). Some factors of pollen sterility have been described as reduced pollen starch accumulation, changes in hormone pathways and altered gene expression under water stress conditions (Yu et al., 2019). Research has revealed that pollen development can be improved if moisture stress can be decreased by reducing the transpiration rate from leaves. Earlier field experiments in HAU have shown that application of film antitranspirant on leaves at critical stage of wheat plants could improve pollen development by increased starch accumulation which results in improved grain number and crop yield (Weerasinghe et al., 2016).The main aim of this study is to test the improvement of wheat yield and pollen starch accumulation responses under different water stress conditions including from film antitranspirant spray, along with studies at a molecular level e.g., transcriptomic responses, gene expression studies etc. to investigate this in more depth. Further hypotheses will be developed later after thorough review of literature. This research will be helpful in future studies for understanding the mechanism of drought tolerance not only at a physiological level but also at a molecular level, which would be useful in managing wheat crops better under water stress conditions and also in breeding varieties for drought tolerance.

干旱是导致全球小麦减产的主要非生物因素之一，也是世界粮食安全的主要关切之一。随着对未来更极端天气条件的预测，更好地了解水分胁迫如何影响小麦作物变得更加关键。研究表明，干旱胁迫是花粉不育的一个重要原因，并影响花粉发育，最终可能导致作物减产(董等人。2017年)。花粉不育的一些因素被描述为水分胁迫条件下花粉淀粉积累减少、激素途径改变和基因表达改变(Yu等人，2019年)。研究表明，如果通过减少叶片的蒸腾速率来减少水分胁迫，可以改善花粉的发育。早些时候在Hau的田间试验表明，在小麦植株关键时期的叶片上应用薄膜抗蒸腾剂可以通过增加淀粉积累来促进花粉发育，从而改善籽粒数和作物产量(Weerasinghe等人，2016)。本研究的主要目的是测试不同水分胁迫条件下小麦产量和花粉淀粉积累响应的改善，包括薄膜抗蒸腾剂喷雾，以及在分子水平上的研究，如转录反应，基因表达研究等，以更深入地研究这一点。进一步的假说将在详细阅读文献后在稍后开发。这一研究将有助于从生理水平和分子水平上了解小麦的耐旱机制，为更好地管理水分胁迫条件下的小麦作物和培育抗旱品种提供依据。