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生物防治剂可降低小麦小穗和秸秆中 的发展和霉菌毒素的产生。

Biocontrol Agents Reduce Progression and Mycotoxin Production of in Spikelets and Straws of Wheat.

机构信息

Qualisud, Univ Montpellier, Avignon Université, CIRAD, Institut Agro, IRD, Université de La Réunion, F-97490 Montpellier, France.

CIRAD, UMR Qualisud, F-34398 Montpellier, France.

出版信息

Toxins (Basel). 2021 Aug 27;13(9):597. doi: 10.3390/toxins13090597.

DOI:10.3390/toxins13090597
PMID:34564602
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8470793/
Abstract

The aim of this study was to evaluate the interactions between wheat plant (spikelets and straws), a strain of mycotoxigenic pathogen and commercial biocontrol agents (BCAs). The ability of BCAs to colonize plant tissue and inhibit the pathogen or its toxin production was observed throughout two phases of the life cycle of pathogens in natural conditions (colonization and survival). All evaluated BCAs showed effective reduction capacities of pathogenic traits. During establishment and the expansion stage, BCAs provoked an external growth reduction of (77-93% over the whole kinetic studied) and mycotoxin production (98-100% over the whole kinetic studied). Internal growth of pathogen was assessed with digital droplet polymerase chain reaction (ddPCR) and showed a very strong reduction in the colonization of the internal tissues of the spikelet due to the presence of BCAs (98% on average). During the survival stage, BCAs prevented the formation of conservation perithecia of the pathogen on wheat straw (between 88 and 98% of perithecia number reduction) and showed contrasting actions on the ascospores they contain, or perithecia production (-95% on average) during survival form. The mechanisms involved in these different interactions between and BCAs on plant matrices at different stages of the pathogen's life cycle were based on a reduction of toxins, nutritional and/or spatial competition, or production of anti-microbial compounds.

摘要

本研究旨在评估小麦植株（小穗和秸秆）、一株产毒真菌病原体和商业生物防治剂（BCAs）之间的相互作用。在自然条件下（定植和存活），观察了 BCAs 定植植物组织和抑制病原体或其毒素产生的能力，该过程贯穿了病原体生命周期的两个阶段。所有评估的 BCAs 均表现出有效的致病特征降低能力。在建立和扩展阶段，BCAs 引起了病原菌外部生长的减少（整个动力学研究过程中的减少率为 77-93%）和真菌毒素产生的减少（整个动力学研究过程中的减少率为 98-100%）。利用数字液滴聚合酶链反应（ddPCR）评估病原菌的内部生长情况，结果表明，由于 BCAs 的存在，病原菌内部组织的定植率大大降低（平均降低 98%）。在存活阶段，BCAs 阻止了病原菌在小麦秸秆上形成保护子囊壳（减少子囊壳数量的比例在 88%至 98%之间），并对其内部包含的子囊孢子或子囊壳产生了不同的作用（存活率平均降低 95%）。这些不同的病原菌与 BCAs 在植物基质上相互作用的机制，基于毒素、营养和/或空间竞争的减少，或抗菌化合物的产生。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7178/8470793/fd6ce992992d/toxins-13-00597-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7178/8470793/fc7757d2b376/toxins-13-00597-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7178/8470793/1eea94e4d1c3/toxins-13-00597-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7178/8470793/0bbdfdf515d9/toxins-13-00597-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7178/8470793/e036cb617a83/toxins-13-00597-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7178/8470793/7be2e702bf0d/toxins-13-00597-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7178/8470793/ebb6bfad20ae/toxins-13-00597-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7178/8470793/fd6ce992992d/toxins-13-00597-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7178/8470793/fc7757d2b376/toxins-13-00597-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7178/8470793/1eea94e4d1c3/toxins-13-00597-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7178/8470793/0bbdfdf515d9/toxins-13-00597-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7178/8470793/e036cb617a83/toxins-13-00597-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7178/8470793/7be2e702bf0d/toxins-13-00597-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7178/8470793/ebb6bfad20ae/toxins-13-00597-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7178/8470793/fd6ce992992d/toxins-13-00597-g007.jpg

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