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一种抑制稻瘟病菌生长的菌株鉴定

2021-10-12刘立娜王春梅王一王金换李成云

安徽农业科学 2021年19期

刘立娜 王春梅 王一 王金换 李成云

摘要 [目的]鉴定真菌M1的种类,明确其对稻瘟病菌的抑制作用。[方法]通过真菌M1的ITS测序,序列比对鉴定真菌种类。采用平板对峙培养和M1发酵液培养稻瘟病菌,分析真菌M1对稻瘟病菌菌株Y92-66b的拮抗作用,计算抑制率。[结果]ITS序列比对确定该真菌M1为蜜环菌( Armillaria novae-zelandiae ),对稻瘟病菌菌株Y92-66b具有显著的抑制作用。密环菌与稻瘟病菌平板对峙培养其抑制率为48.80%;当发酵液浓度达50%时,稻瘟病菌菌株Y92-66b的菌丝生长抑制率为78.79%。[结论]蜜环菌对稻瘟病菌菌株Y92-66b具有显著的抑制效果,可作为稻瘟病生防菌的候选真菌。

关键词 蜜环菌;稻瘟病菌;抑制作用;生防真菌

中图分类号 S 435.111.4+1  文献标识码 A  文章编号 0517-6611(2021)19-0127-03

doi:10.3969/j.issn.0517-6611.2021.19.032

开放科学(资源服务)标识码(OSID):

Identification of a Fungus with Significant Inhibition on Rice Blast Fungus  Magnaporthe oryzae

LIU Li-na1,2, WANG Chun-mei2,3, WANG  Yi2 et al

(1.Agricultural Environment and Resources Institute, Yunnan Academy of Agricultural Sciences, Kunming,Yunnan  650205;2. State Key Laboratory for Conservation and Utilization of Bio-Resources in Yunnan, Yunnan Agricultural University, Kunming, Yunnan  650201;3. Dehong Tropical Agriculture Research Institute of Yunnan, Ruili,Yunnan  678600)

Abstract [Objective]To identify the species of the fungus and determine the inhibition effect of M1 on  M. oryzae . [Method]Firstly, in order to identify the species of M1, the ITS sequence was sequenced and aligned with sequences from NCBI. Secondly, the antagonistic effect of fungus M1 on strain Y92-66b was determined by plate confrontation method and the crude extract of M1, and then the inhibition rate was calculated. [Result]The aligned ITS sequences showed that fungus M1 was  Armillaria  novae-zelandiae. The data suggested that the hypha growth of strain Y92-66b were inhibited by  Armillaria , and the inhibition rate reached 48.80%. In addition, the hypha growth of strain Y92-66b was inhibited significantly by the crude extract of  Armillaria , and the hypha growth rate reached 78.79%, when the concentration of crude extract reached 50%. [Conclusion] Armillaria  has a significant inhibition effect on hypha growth of strain Y92-66b, and it could be used as a candidate biocontrol fungus for rice blast.

Key words  Armillaria ; Magnaporthe oryzae ;Inhibition effect;Antagonistic fungi

基金项目 国家重点研发计划(2017YFD0200400);云南农业大学省部共建云南生物资源保护与利用国家重点实验室开放课题(GZKF201902);云南省教育厅科学研究基金项目(2020J0252)。

作者简介 刘立娜(1983—),女,天津宝坻人,助理研究员,博士,从事分子植物病理学研究;

王春梅(1991—),女,云南德宏人,研究实习员,硕士,从事植物保护学研究。刘立娜和王春梅为共同第一作者。*通信作者,教授,博士生导师,从事植物保护学研究。

收稿日期 2020-12-01

稻瘟病是水稻最严重的病害之一,是由稻瘟病菌( Magnaporthe oryzae )侵染引起的水稻真菌性病害,该病害可以在所有水稻种植区和水稻不同生长期暴发,具有分布广、危害大的特点。在全球范围内,每年稻瘟病可使水稻减产10%~30%,造成严重的经济损失[1]。然而,世界50%以上的人口以水稻为主食[2],据国际粮食政策研究所分析,到2030年人类要在更少的种植面积上生产出目前水稻产量的1.38倍才能满足人口日益增长的需求[3]。……

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