多功能NAC转录因子SlJA2L集成乙烯通路,用于调节番茄的耐热性和果实成熟
Yunfei Liang1,2, Fang Ma1,2, Shudi Huang2
1State Key Laboratory for Crop Stress Resistance and High-Efficiency Production and College of Horticulture, Northwest A&F University, Yangling, 712100, China.
一种新的番茄NAC转录因子,SlJA2L,结合了热应激和水果成熟. 它通过调节关键基因和乙烯信号来增强耐热性并促进成熟,为气候适应性作物提供战略.
科学领域:
- 植物分子生物学 植物分子生物学
- 适应气候变化 适应气候变化
- 发展水果发展水果发展
背景情况:
- 气候变化引起的热应激会对作物产量和质量产生负面影响.
- 果实成熟是一个复杂的过程,涉及转录因子 (TF) 和乙烯信号.
- 热应激反应与水果成熟之间的分子联系尚未得到充分理解.
研究的目的:
- 在番茄中识别和描述一个结合热应激适应和果实成熟的TF.
- 阐明本TF控制耐热性和成熟的监管机制.
主要方法:
- 在番茄中识别一种对热和成熟敏感的NAC TF,SlJA2L.
- 使用基因过度表达和CRISPR-Cas9淘汰对SlJA2L功能的分析.
- 在热应力和成熟过程中对SlJA2L的分子点进行研究.
- 评估乙烯在耐热性中的作用.
主要成果:
- 过度表达SlJA2L增强了耐热性,促进了成熟;它的淘汰导致了热敏感性和延迟成熟.
- 在热应激下,SlJA2L直接激活热冲击基因 (SlHsfA3,SlCAT3).
- 通过激活乙烯生物合成 (SlACO1) 和胡卜素积累 (SlCRTISO),SlJA2L促进成熟.
- 乙烯信号有助于番茄的耐热性.
结论:
- 在番茄中,SlJA2L作为热应激和果实成熟的关键分子整合剂.
- 这个TF通过乙烯信号来协调应激适应与发育过程.
- 这些发现为开发具有改善水果质量的气候适应性作物提供了潜在的战略.
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