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苯醚甲环唑拌种对小麦根际微生物群落的影响

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小麦茎基腐病是我国北方小麦主产区的重大病害,对小麦安全生产造成严重威胁.化学农药的使用是最直接有效的防治方法,在植物病害防治中发挥重要作用.苯醚甲环唑是一种具有较高安全性的三唑类杀菌剂.本课题前期明确了苯醚甲环唑拌种对小麦茎基腐病有一定的防治效果,且促生增产,但其对小麦根际微生物的影响尚不清楚.本文研究了苯醚甲环唑拌种对茎基腐病田中小麦根际土壤微生物的影响,结果表明,苯醚甲环唑拌种处理对小麦分蘖期,拔节期和灌浆期根际微生物的alpha和beta多样性均无显著影响,但使分蘖期镰孢属的相对丰度显著降低.微生物共现网络分析表明,苯醚甲环唑拌种处理提高了细菌网络的复杂性,降低了真菌网络复杂性,使植株根际微生物网络更接近健康植株根际的特征.该研究从根际微生物的角度为苯醚甲环唑防治小麦茎基腐病的机制研究及对土壤微生物的安全性评价提供理论依据.
Effect of seed-coating with difenoconazole on microorganisms in the wheat rhizosphere
Fusarium crown rot of wheat(FCR)is an important disease threatening wheat production in major areas of North China.Chemical control is usually the most direct and effective method,playing an important role in controlling plant diseases.Difenoconazole,a triazole fungicide known for its high safety,has been previously used to control FCR by seed-coating,and has achieved a certain effect,it also can promote wheat growth and production,but its impact on wheat rhizosphere microorganisms is still unknown.This study explored its effect on rhizosphere microbes in FCR-infected fields.The results revealed no significant impact on alpha and beta diversity of rhizosphere microbes at tillering,jointing and filling stages of wheat.However,it significantly reduced the relative abundance of the genus Fusarium at the tillering stage.Analysis of microbial co-occurrence networks indicated that seed-coating with difenoconazole improved the complexity of the bacterial network and reduced the complexity of fungal network,thus making the microbial network more closer to the rhizosphere characteristics of healthy plants.This study contributes to the theoretical understanding of difenoconazole's mechanism in controlling FCR from the perspective of rhizosphere microorganisms and provides valuable insights for safety evaluation of soil microbes.

Fusarium crown rot of wheatdifenoconazolerhizosphere microorganismsFusariumco-occurrence network

冯超红、李丽娟、张姣姣、王俊美、李亚红、刘露露、韩自行、石瑞杰、万鑫茹、徐飞、宋玉立

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河南省农业科学院植物保护研究所,农业农村部华北南部作物有害生物综合治理重点实验室,郑州 450002

小麦茎基腐病 苯醚甲环唑 根际微生物 镰孢属 共现网络

河南省中央引导地方科技发展资金项目河南省科技攻关计划河南省小麦产业技术体系建设项目河南省小麦产业技术体系建设项目河南省农科院基础性科研工作项目

Z20221343041222102110170HARS-22-01-G6HARS-22-01-T2023JC19

2024

10.16688/j.zwbh.2023132

植物保护
中国植物保护学会 中国农业科学院植物保护研究所

植物保护

CSTPCD北大核心
影响因子：1.004
ISSN：0529-1542
年,卷(期)：2024.50(2)
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