|本期目录/Table of Contents|

[1]郎剑锋,张强,刘雯,等.玉米根围土壤中木霉菌的分离、鉴定及生防评价[J].江苏农业科学,2024,52(15):160-165.
 Lang Jianfeng,et al.Isolation,identification and biocontrol evaluation of Trichoderma from corn rhizosphere soil[J].Jiangsu Agricultural Sciences,2024,52(15):160-165.
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玉米根围土壤中木霉菌的分离、鉴定及生防评价(PDF)
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《江苏农业科学》[ISSN:1002-1302/CN:32-1214/S]

卷:
第52卷
期数:
2024年第15期
页码:
160-165
栏目:
植物保护
出版日期:
2024-08-05

文章信息/Info

Title:
Isolation,identification and biocontrol evaluation of Trichoderma from corn rhizosphere soil
作者:
郎剑锋张强刘雯陆宁海吴艳兵
河南科技学院资源与环境学院,河南新乡 453003
Author(s):
Lang Jianfenget al
关键词:
玉米根围土壤鉴定棘孢木霉生物防治
Keywords:
-
分类号:
S435.13
DOI:
-
文献标志码:
A
摘要:
木霉是目前研究较多的生防真菌之一,从玉米根围土壤中分离木霉菌并进行准确鉴定,可为玉米病害的生物防治和生防菌剂的制备奠定基础。采用孟加拉红培养基,利用梯度稀释平板法从玉米根围土壤中分离木霉菌,观察其在不同培养基(PDA、MEA、CMD、SNA)中的菌落形态和产孢结构,并计算木霉菌在不同培养基中的产孢量,以及在优化的液体培养基中观察厚垣孢子的产生情况,在形态学特征基础上,构建TEF1-α基因序列系统发育树对木霉菌株进行鉴定,采用对峙培养和埋片法观测木霉对3种植物病原菌的拮抗能力。结果显示,从玉米根围土壤中分离得到1株木霉菌Tr20190808-c,其菌落初期为白色,随着培养时间的增加,颜色逐渐变成绿色,背面无色,菌落中间有明显的产孢区。分生孢子梗丛束疏松,次生分枝相对排列,瓶梗中间膨大,基部和端部稍细,大小为(8.66±044) μm×(287±0.32) μm。分生孢子卵圆形或球形,直径为(3.22±0.36) μm,表面光滑。菌丝体毛状不规则排列,厚垣孢子球形,直径约为(9.02±0.52) μm。此木霉在PDA培养基上的产孢量最高,为(4.97±0.98)×108个/mL。分子鉴定显示该木霉菌株Tr20190808-c与棘孢木霉同源性最高,结合形态特征和分子鉴定结果,最终鉴定该菌为棘孢木霉(Trichoderma asperellum)。皿内对峙试验表明,该木霉对3种病原菌的生防能力不同。培养12 d后均可覆盖3种病原菌菌落,且木霉菌丝可缠绕在灰霉菌和弯孢菌的菌丝上,综合评价该菌具有强的拮抗能力,可作为今后生防菌剂的来源菌株用于玉米病害的生物防治。
Abstract:
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备注/Memo

备注/Memo:
收稿日期:2023-08-15
基金项目:河南省重点研发与推广专项(科技攻关)(编号:212102110144、232102111027、222102110055)。
作者简介:郎剑锋(1979—),男,山西高平人,博士,高级实验师,硕士生导师,主要从事植物病害生物防治研究。E-mail:langjianfeng@126.com。
通信作者:吴艳兵,博士,教授,硕士生导师,主要从事农业微生物资源利用与土壤修复研究。E-mail:wybhist@126.com。
更新日期/Last Update: 2024-08-05