First line of defence: Eucalyptus leaf waxes influence infection by an aggressive fungal leaf pathogen

IF 3.6 3区 生物学 Q1 PLANT SCIENCES Plant Biology Pub Date : 2024-08-20 DOI:10.1111/plb.13707
M. Solís, S. Naidoo, M. J. Wingfield, J. C. Joubert, A. Hammerbacher
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第一道防线:桉树叶蜡影响侵袭性真菌叶片病原体的感染。
叶片表皮蜡具有重要的解剖和化学防御作用,可抵御真菌对叶片的感染。在这项研究中,我们分析了大叶桉 × 尢菲拉桉(Eucalyptus urophylla)杂交种的叶蜡成分,这些杂交种对由破坏性特拉托孢菌(Teratosphaeria destructans)引起的特拉托孢叶枯病(TLB)的敏感性不同,而特拉托孢叶枯病是桉树最重要的叶面病害之一。从对 TLB 敏感程度不同的未接种和已接种基因型中提取了桉树角质蜡,并用气相色谱-质谱法进行了分析。结果表明,一种三萜类化合物环木菠萝烯醇(CAS)在抗性基因型中含量丰富,而在抗性基因型中,己二酸的含量随着去甲睾丸虫的感染而增加。相比之下,接种的高度易感基因型中棕榈酸的含量明显更高。利用纯化合物进行的体外和植物体内去果壳霉孢子萌发试验表明,CAS 和己二酸能显著抑制孢子萌发。在易感寄主的叶片上施用这两种化合物还能显著提高抗感染能力。与此相反,棕榈酸能促进孢子萌发,在抗性基因型叶片上施用时,还能增加病原体的定殖。这是首次对不同易感性宿主的叶蜡成分差异进行深入研究。研究还表明,叶蜡化合物可以调节孢子萌发,并最终影响宿主的抗感染能力。
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来源期刊
Plant Biology
Plant Biology 生物-植物科学
CiteScore
8.20
自引率
2.60%
发文量
109
审稿时长
3 months
期刊介绍: Plant Biology is an international journal of broad scope bringing together the different subdisciplines, such as physiology, molecular biology, cell biology, development, genetics, systematics, ecology, evolution, ecophysiology, plant-microbe interactions, and mycology. Plant Biology publishes original problem-oriented full-length research papers, short research papers, and review articles. Discussion of hot topics and provocative opinion articles are published under the heading Acute Views. From a multidisciplinary perspective, Plant Biology will provide a platform for publication, information and debate, encompassing all areas which fall within the scope of plant science.
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