乙烯对抗ABA,抑制口腔关闭和米的冷却耐受性
Shuying Huang1, Huanhuan Wang1,2, Shiyan Liu1
1The State Key Laboratory of Crop Genetics & Germplasm Enhancement and Utilization, Jiangsu Collaborative Innovation Center for Modern Crop Production, Nanjing Agricultural University, Nanjing 210095, China.
Journal of experimental botany
|February 6, 2025
概括
乙烯通过阻断酸 (ABA) 作用,对米冷却耐受性产生负面影响. 乙烯信号蛋白OsCTR1和OsCTR2是这种ABA对抗的关键,影响口腔关闭和在寒冷压力下生存.
科学领域:
- 植物生物学 植物生物学
- 压力生理学 压力生理学
- 分子遗传学 分子遗传学
背景情况:
- 冷却压力显著限制了大米种植和作物产量.
- 乙烯对大米冷却耐受性的作用尚不清楚.
- 众所周知,酸 (ABA) 能促进植物的冷却耐受性.
研究的目的:
- 为了研究乙烯在大米冷却耐受性中的作用.
- 为了阐明乙烯和ABA在大米冷反应中的相互作用.
- 确定涉及冷却压力的关键乙烯信号组件.
主要方法:
- 用乙烯或其前体 (ACC) 处理大米植物,并评估存活率和口腔关闭.
- 在冷却压力下分析乙烯信号基因 (OsCTR1和OsCTR2) 功能丧失突变体.
- 在冷却条件下评估ABA对野生类型和突变大米的影响.
- 研究ABA对乙烯介导反应的影响.
主要成果:
- 在冷却压力下,乙烯处理降低了的存活率,并延迟了口腔关闭.
- 功能丧失突变体 (ctr1 ctr2) 的冷却耐受性降低,口腔关闭速度减慢.
- 在野生米中,ABA治疗提高了冷却耐受性,并促进了口腔关闭.
- 乙烯对抗了ABA对冷却耐受性和口腔关闭的有益作用.
- 这种ctr1 ctr2双变异体没有对ABA做出反应,导致口腔关闭或增强生存.
结论:
- 乙烯可以负面调节大米的冷却耐受性.
- 乙烯对抗ABA诱导的冷却耐受性和口腔关闭.
- OsCTR1和OsCTR2是关键的乙烯信号组件,调解这种负调节.
- 乙烯通过OsCTR1和OsCTR2抑制了ABA诱导的口腔关闭,影响了大米的冷硬性.
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