黑色素通过SlPMTRs-SlCaM6-SlICE1信号级联调节番茄的寒冷耐受性
Ying Liu1, Shirui Jing1, Congyang Jia1
1College of Horticulture, China Agricultural University, Beijing, 100193, China.
The Plant journal : for cell and molecular biology
|October 15, 2025
概括
植物氨酸受体SlPMTR1/2通过增强抗氧化酶和激活信号通路来保护番茄免受寒冷压力. 这项研究阐明了这些受体如何增强植物的耐寒性.
科学领域:
- 植物科学 植物科学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 寒冷压力通过氧化损伤对植物生长和产量产生负面影响.
- 植物氨酸 (MT) 提高了耐寒性,但其受体和信号通路尚未完全理解.
研究的目的:
- 调查植物氨酸受体SlPMTR1/2在番茄寒冷耐受性中的作用.
- 为了阐明SlPMTR1/2在应对寒冷压力的过程中介导的信号通路.
主要方法:
- 在4°C时用黑激素对番茄进行处理.
- 分析抗氧化酶活动,活性氧物种和马隆迪化物水平.
- 蛋白相互作用研究 (SlPMTR1/2和SlCaM6) 和基因表达分析 (SlICE1,SlCBF1,SlCNGC2).
主要成果:
- SlPMTR1/2对于MT介导的寒冷保护至关重要,通过增强抗氧化酶来减少氧化损伤.
- SlPMTR1/2与SlCaM6相互作用,阻止其对Slice1的核抑制,从而激活Slice1-SlCBF1转录模块.
- SlCBF1上调SlCNGC2,增加Ca2+的流入,这是通过SlPMTR1/2通过MT放大,加强寒冷耐受性.
结论:
- 在番茄寒冷适应过程中发现了一条涉及SlPMTR1/2的双信号通路.
- SlPMTR1/2增强了抗氧化防御,并激活了Ca2+介导的转录反应,从而提高了寒冷耐受性.
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