The Influence of Ectotrophic Mycorrhizal Fungi on the Resistance of Pine Roots to Pathogenic Infections. I. Antagonism of Mycorrhizal Fungi to Root Pathogenic Fungi and Soil Bacteria.

IF 3.1 2区农林科学 Q2 PLANT SCIENCES

Phytopathology Pub Date : 2025-08-01 DOI:10.1094/Phyto-59-153

Donald H Marx

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Abstract

Antagonism of ectotrophic mycorrhizal fungi to Phytophthora cinnamomi, other root pathogenic fungi, and soil bacteria was examined. In agar plate tests, Laccaria laccata, Lactarius deliciosus, Leucopaxillus cerealis var. piceina, Pisolithus tinctorius, and Suillus luteus inhibited growth of nearly half of the 48 different fungal root pathogens. Leucopaxillus cerealis var. piceina inhibited 92% of the test pathogens. Differences in sensitivity of several isolates of P. cinnamomi to inhibitions by this symbiont were not found. Culture filtrates of L. cerealis var. piceina were inhibitory also to growth of P. cinnamomi and soil bacteria. Zoospore germination was inhibited completely in filtrates of this symbiont. Maximum antibiotic production occurred during the rapid growth phase in liquid culture. Length of culture incubation and temperature strongly influenced production of inhibitory substances by L. cerealis var. piceina in liquid culture. It grew best from 10 to 20 C, whereas P. tinctorius grew best from 30 to 35 C in liquid culture.

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异养菌根真菌对松根抗病性的影响。菌根真菌对根致病真菌和土壤细菌的拮抗作用。

研究了异养菌根真菌对肉桂疫霉、其他根病原真菌和土壤细菌的拮抗作用。在琼脂平板试验中，乳酸菌、美味乳酸菌、青叶白蜡菌、淡色乳酸菌和黄豆乳酸菌抑制了48种不同真菌根病原体中近一半的生长。对试验病原菌有92%的抑制作用。不同菌株对该共生体抑制作用的敏感性没有差异。对肉桂病菌和土壤细菌的生长也有抑制作用。该共生体滤液中游动孢子的萌发被完全抑制。在液体培养中，在快速生长阶段产生的抗生素最多。在液体培养中，培养时间和培养温度对松花菌产生抑制物质有较大影响。在10 ~ 20℃的液体培养条件下生长最好，而在30 ~ 35℃的液体培养条件下生长最好。

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来源期刊

Phytopathology 生物-植物科学

CiteScore

5.90

自引率

9.40%

发文量

505

审稿时长

4-8 weeks

期刊介绍： Phytopathology publishes articles on fundamental research that advances understanding of the nature of plant diseases, the agents that cause them, their spread, the losses they cause, and measures that can be used to control them. Phytopathology considers manuscripts covering all aspects of plant diseases including bacteriology, host-parasite biochemistry and cell biology, biological control, disease control and pest management, description of new pathogen species description of new pathogen species, ecology and population biology, epidemiology, disease etiology, host genetics and resistance, mycology, nematology, plant stress and abiotic disorders, postharvest pathology and mycotoxins, and virology. Papers dealing mainly with taxonomy, such as descriptions of new plant pathogen taxa are acceptable if they include plant disease research results such as pathogenicity, host range, etc. Taxonomic papers that focus on classification, identification, and nomenclature below the subspecies level may also be submitted to Phytopathology.