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SlIAA9突变增强了番茄种子对热应激的抵抗力

Bayu Pradana Nur Rahmat¹, Iqbal Fathurrahim Elfakhriano¹, Nono Carsono²

¹Graduate School of Life and Environmental Sciences, University of Tsukuba, Tsukuba, Japan.

Plant physiology and biochemistry : PPB

|February 15, 2026

概括

失去了SlIAA9功能,通过提高抗氧化能力和热敏基因,提高了番茄种子对热应激的抵抗力. 这种基因改造改善了在高温下发芽和恢复.

科学领域:

植物生物学植物生物学
遗传学是一个遗传学.
压力生理学压力生理学

背景情况:

种子发芽期间的热应激极大地限制了作物的建立.
影响种子耐热性的荷尔蒙和遗传因素尚未得到充分了解.
在番茄种子热反应中,辅酶信号抑制剂SlIAA9的作用尚不确定.

研究的目的:

研究SlIAA9功能丧失突变对番茄种子热应激弹性的影响.
分析在压力和恢复期间对发芽,种子质量,活性氧物种 (ROS) 和基因表达的影响.

主要方法:

使用了两个SLIAA9突变系 (iaa9-5, iaa9-3) 和野生型微型番茄.
评估的发芽率,种子/幼苗质量,ROS水平 (H2O2,O2-).
分析了抗氧化剂,热敏,ABA和乙烯生物合成基因的转录反应.

主要成果:

斯里亚A9突变体表现出增强的热应激弹性和快速的后应激恢复.
突变者显示ROS积累减少,抗氧化剂/热敏基因表达升高.
HSFA9和HSP70在突变分子中被强烈诱导;ABA生物合成基因被抑制,乙烯基因在恢复过程中被上调.

结论:

SlIAA9充当番茄种子耐热压力的负调节者.
失去了SlIAA9的功能,提高了抗氧化能力和热敏基因表达.
SlIAA9是一种潜在的遗传点,可以增强种子对热应激的耐受性.

关键词:

抗氧化酶酶是一种抗氧化酶.辅助信号传输辅助信号传输热冲击转录因子热冲击转录因子有反应性氧物种的反应性氧物种.种子的发芽种子的发芽

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