Molecular basis of water use efficiency mediated by ABA receptors (B01)

ABA 受体介导的水利用效率的分子基础（B01）

• 批准号: 200637482
• 金额: --
• 依托单位: Lehrstuhl für Botanik
• 依托单位国家: 德国
• 项目类别: Collaborative Research Centres
• 财政年份: 2011
• 资助国家: 德国
• 起止时间: 2010-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/200637482?language=en
• 关键词: Molecular; basis; water; use; efficiency

Water deficit is the major limitation of crop yield and impinges on yield stability. Ectopic expression of certain abscisic acid receptors in Arabidopsis thaliana can result in plants having reduced transpiration while photosynthesis rate and growth properties are unaffected. CO2 uptake into these lines is more water-efficient by a lowered intercellular CO2 level compared to wild type. How plants can sustain photosynthesis with lowered intercellular CO2 concentrations is an intriguing and unresolved question and might involve metabolic adjustments at multiple levels. In this project part, the physiological and genetic basis of this water use efficient trait will be studied.

水分亏缺是作物产量的主要限制因素，严重影响作物产量的稳定性.拟南芥中某些脱落酸受体的异位表达可导致植物具有减少的蒸腾作用，而光合速率和生长特性不受影响。与野生型相比，通过降低细胞间CO2水平，这些品系的CO2吸收更具水效率。植物如何在细胞间CO2浓度降低的情况下维持光合作用是一个有趣且尚未解决的问题，可能涉及多个水平的代谢调节。本项目将对这一水分利用效率性状的生理和遗传基础进行研究。