斯蒙酸和氧化为番茄中Botrytis cinerea耐药性的层次性黑色素级联管弦乐队
Qing Shan1, Dan Zhao1, Bili Cao1
1College of Horticulture Science and Engineering, Shandong Agricultural University, Tai'an 271018, China.
Plant physiology
|February 20, 2025
概括
氧化和莉酸调节番茄的黑激素产量,以对抗灰色的菌. 提高SlCOMT2的稳定性提供了一种改善番茄病耐药性的新策略.
科学领域:
- 植物病理学 植物病理学
- 分子生物学分子生物学
- 生物化学 生物化学
背景情况:
- 番茄灰,由Botrytis cinerea引起,显著影响番茄的生产.
- 黑素增强了植物对Botrytis cinerea的抵抗力,但其在感染期间的生物合成调节尚不清楚.
研究的目的:
- 为了阐明在Botrytis cinerea感染期间番茄中黑激素生物合成的调节机制.
- 建立一个工作模型,说明斯酸 (JA) 和氧化 (NO) 在这个过程中的作用.
主要方法:
- 研究了对Botrytis cinerea感染的早期和晚期反应.
- 通过NO分析了番茄咖啡酸O-甲基转移酶2 (SlCOMT2) 的S-化.
- 在SlCOMT1和SlCOMT2.2上检查了由JA触发的SLMYC2的转录调节.
- 评估了黑激素积累对细胞死亡和活性氧物种的影响.
主要成果:
- 氧化 (NO) 对Botrytis cinerea感染的反应比斯酸 (JA) 早.
- 早期感染:NO S-基化SlCOMT2在Cys344,使其稳定,防止蛋白质体降解.
- 晚期感染:JA诱导的SlmYC2激活了SlCOMT1和SlCOMT2的转录.
- NO和JA协同促进了COMT介导的黑激素生物合成.
- 黑色素积累通过清除活性氧物种来抑制细胞死亡,阻碍病原体感染.
结论:
- 建议在Botrytis cinerea感染期间调节黑素生物合成的NO和JA作用的协同模式.
- SlCOMT2Cys344被确定为基因操纵或育种的潜在目标,以增强番茄中的黑激素合成和Botrytis cinerea耐药性.
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