防御的第一道防线:树叶的会影响侵袭性真菌叶病原体的感染
M Solís1, S Naidoo1, M J Wingfield1
1Department of Biochemistry, Genetics and Microbiology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria, South Africa.
Plant biology (Stuttgart, Germany)
|August 20, 2024
概括
叶子表皮含有诸如环甲醇和六酸之类的化合物,可抑制Teratosphaeria destructans子的发芽,增强树对叶子病变的抵抗力. 然而,棕酸促进了真菌生长.
科学领域:
- 植物病理学 植物病理学
- 化学生态化学生态学
- 林业林业 林业 林业 林业
背景情况:
- 叶子表皮状对于植物对抗真菌病原体的防御至关重要.
- 由Teratosphaeria destructans引起的Teratosphaeria叶病 (TLB) 是一种影响树物种的重大疾病.
研究的目的:
- 调查叶成分与树混合物对TLB易感性之间的关系.
- 为了确定影响Teratosphaeria destructans感染的特定化合物.
主要方法:
- 在Eucalyptus grandis × Eucalyptus urophylla杂交物中使用气色谱-质谱学分析具有不同TLB易感性的叶子皮状成分.
- 在体外和植物内测试以评估已识别的化合物对T. destructans子发芽和感染的影响.
主要成果:
- 耐药的树基因型在感染时具有更高的环甲醇 (CAS) 和增加的六氧化酸.
- 敏感的基因型在接种疫苗后显示出更多的棕酸.
- 酸和六酸抑制了T. destructans子发芽和增加宿主抵抗力,而棕酸促进了发芽和病原体殖民.
结论:
- 叶的成分在欧树基因型之间有显著差异,对T. destructans.的敏感性各不相同.
- 特定的叶化合物,环醇和六胺酸,在调节树对Teratosphaeria叶病的耐药性方面发挥着直接作用.
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