一个解码模块将挥发性DMNT转化为Camellia sinensis中的酸介导的草本动物耐药性
Bo Li1, Yanni Deng1, Mengyao Chai1
1National Key laboratory for tea Plant Germplasm innovation and Resource Utilization, Anhui Agricultural University, 230036 Hefei, Anhui, P R China.
Plant physiology
|August 29, 2025
概括
草食动物诱导的挥发性物质,如DMNT,通过触发Ca2+-CAMTA3-WRKY70-LOX3信号级联来激活植物防御,促进莉酸 (JA) 生物合成,并增强茶叶植物的耐药性.
科学领域:
- 植物分子生物学 植物分子生物学
- 植物化学生态学 植物化学生态学
- 生物化学 生物化学
背景情况:
- 植物利用挥发性有机化合物来防御食草动物.
- 挥发性诱导植物防御信号的分子机制尚未完全理解.
研究的目的:
- 阐明草食动物诱导的挥发性 (E) -4,8-二甲基-1,3,7-非 (DMNT) 在茶叶植物中激活莉酸 (JA) 生物合成中的分子途径.
- 为了确定参与DMNT诱导的植物防御的关键信号组件.
主要方法:
- 使用成像,酶记者测定,酵母一混合,电泳性移动转移测定和反感性寡核酸沉默.
- 对CsCAMTA3,CsWRKY70和CsLOX3进行了基因表达分析.
主要成果:
- DMNT诱导了Ca2+的流入,激活了CsCAMTA3,它直接与CsWRKY70促进体结合.
- CsWRKY70激活了CsLOX3的表达,导致JA和JA-Ile的积累增加.
- 沉默CsCAMTA3或CsWRKY70会影响JA生物合成,并降低植物对食草动物的抵抗力.
结论:
- 一个新的Ca2+-CAMTA3-WRKY70-LOX3信号级联介导DMNT诱导的JA生物合成和植物防御.
- 这一途径对于茶叶植物对茶叶几何体的抵抗至关重要.
- 这些发现扩大了对植物之间的沟通和挥发性介导防御的理解.
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