ORIGINAL RESEARCH article
Front. Plant Sci.
Sec. Plant Pathogen Interactions
Volume 16 - 2025 | doi: 10.3389/fpls.2025.1593369
This article is part of the Research TopicProtecting Crops From Pests and Diseases with New Advancements in Bioprotectants and BiostimulantsView all articles
Melatonin-induced Bacillus tequilensis enhanced the disease resistance of Camellia oleifera against anthracnose by modulating cell wall and phenylpropanoid metabolism
Provisionally accepted
- 1Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Southwest Forestry University, Kunming, China
- 2Southwest Forestry University, Kunming, Yunnan Province, China
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Anthracnose is a critical disease that affects the healthy development of the Camellia oleifera industry. This study evaluated the control effect of melatonin-induced Bacillus tequilensis DZY6715 (MT-DZY 6715) on C. oleifera anthracnose. The application of MT-DZY 6715 effectively controls the growth of Colletotrichum siamense, markedly reducing the incidence of C. oleifera anthracnose and delaying the spread of pathogens on its leaves. Furthermore, MT-DZY 6715 treatment enhanced leaf thickness, palisade mesophyll, as well as elevated the ratio of palisade mesophyll to spongy mesophyll (PS) and tissue compactness (CTR), while simultaneously decreasing tissue looseness (SR). Meanwhile, the leaf stomata undergo a reduction in size and a decrease in their openness. In addition, MT-DZY 6715 promoted the expression of secondary metabolism-related genes, such as PAL, CAL, Laccase, HCT, and CHI, and inhibited the activity of enzymes related to cell wall degradation (pectinase and cellulase), thereby coordinating and enhancing the accumulation of secondary metabolites and strengthening the mechanical properties of the cell wall. Therefore, MT-DZY6715 is an effective application for reducing the incidence of C. oleifera anthracnose.
Keywords: Melatonin, Bacillus tequilensis, Anthracnose, enzyme activity, transcriptome analysis
Received: 14 Mar 2025; Accepted: 19 May 2025.
Copyright: © 2025 WANG, Aiting, Zhou, Peng, Liu, Wu and Deng. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
* Correspondence: FANG WANG, Key Laboratory for Forest Resources Conservation and Utilization in the Southwest Mountains of China, Southwest Forestry University, Kunming, China
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