Dieye Cheikh Ahmeth Tidiane, Durand Noël, Schorr-Galindo Sabine, Strub Caroline, Fontana Angélique
UMR Qualisud, Univ Montpellier, Univ Avignon, CIRAD, Institut Agro, IRD, Univ de la Réunion, Montpellier, France.
CIRAD, UMR Qualisud, France - Qualisud, Univ Montpellier, Univ Avignon, CIRAD, Institut Agro, IRD, Univ de La Réunion, Montpellier, France.
J Sci Food Agric. 2024 Jan 30;104(2):932-941. doi: 10.1002/jsfa.12991. Epub 2023 Sep 29.
Evolving climatic conditions impact the behavior of microorganisms. The lack of efficiency of beneficial microorganisms against pathogens can be due to these evolving abiotic factors more favorable to the development and adaptation of pathogens. It is therefore of great interest to understand their impact (especially temperature increase and relative humidity (RH) variation) on pathogenic and non-pathogenic microorganisms. This work aimed to examine the possible effects of increasing temperature (20, 25, 30 and 33 °C) and RH (40%, 50%, 60% and 80%) on the growth and mycotoxin production (deoxynivalenol (DON) and zearalenone (ZEN)) of Fusarium graminearum, on the growth of three commercial biocontrol agents (BCAs; Mycostop®, Xedavir® and Polyversum®) and on the pathogen-BCA interaction.
Results demonstrated that BCAs have contrasting impacts on the growth and mycotoxinogenesis of F. graminearum depending on abiotic factors. At 25 °C and regardless of RH, commercial BCAs limit DON production by F. graminearum, but at 30 °C and intermediate RH, Xedavir® is no longer effective. The ability of Xedavir® to control the production of ZEN production by F. graminearum is also affected by abiotic factors. However, increasing temperature has an opposite effect on its ability to control the accumulation of ZEN. Polyversum® oomycete is the BCA with the most resilient efficacy against F. graminearum toxinogenesis under the different abiotic factors.
This work provides new knowledge of the effect of these abiotic parameters on the interaction between BCA and F. graminearum, especially on the production of mycotoxins. It paves the way for the development of efficient and resilient mycotoxin biocontrol strategies using beneficial microorganisms against F. graminearum, thus contributing to global food security. © 2023 Society of Chemical Industry.
不断变化的气候条件影响着微生物的行为。有益微生物对抗病原体效率低下可能是由于这些不断变化的非生物因素更有利于病原体的生长和适应。因此，了解它们（尤其是温度升高和相对湿度（RH）变化）对致病和非致病微生物的影响具有重要意义。这项工作旨在研究温度升高（20、25、30和33°C）和RH（40%、50%、60%和80%）对禾谷镰刀菌生长和霉菌毒素产生（脱氧雪腐镰刀菌烯醇（DON）和玉米赤霉烯酮（ZEN））、三种商业生物防治剂（BCAs；Mycostop®、Xedavir®和Polyversum®）生长以及病原体与BCA相互作用的可能影响。
结果表明，根据非生物因素的不同，BCAs对禾谷镰刀菌的生长和霉菌毒素生成有不同的影响。在25°C且无论RH如何时，商业BCAs会限制禾谷镰刀菌产生DON，但在30°C和中等RH条件下，Xedavir®不再有效。Xedavir®控制禾谷镰刀菌产生ZEN的能力也受到非生物因素的影响。然而，温度升高对其控制ZEN积累的能力有相反的影响。在不同的非生物因素下，Polyversum®卵菌是对禾谷镰刀菌毒素生成具有最具弹性功效的BCA。
这项工作提供了关于这些非生物参数对BCA与禾谷镰刀菌相互作用，特别是对霉菌毒素产生影响的新知识。它为利用有益微生物对抗禾谷镰刀菌开发高效且有弹性的霉菌毒素生物防治策略铺平了道路，从而有助于全球粮食安全。© 2023化学工业协会。
