荧光假单胞菌及其抗生素防治棉花幼苗枯丝核病。

IF 3.1 2区农林科学 Q2 PLANT SCIENCES

Phytopathology Pub Date : 2025-08-01 DOI:10.1094/Phyto-69-480

C R Howell, R D Stipanovic

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引用次数: 0

摘要

从棉花幼苗根际分离到一株对茄枯丝核菌具有拮抗作用的荧光假单胞菌。从荧光假单胞菌培养物中分离到一种对茄枯病菌有较强抑制作用的抗生素，鉴定为pyrrolnitrin（3-氯-4-[2'-硝基-3'-氯苯基]-吡咯）。该抗生素还抑制了与棉花幼苗疾病相关的其他真菌的生长，包括：基状拟滴虫、互花孢菌和大丽花黄萎病。镰刀菌仅被部分抑制，而最后一孢霉未受影响。棉籽种植时用荧光假单孢菌或硝基吡啶处理，幼苗成活率分别由30%提高到79%和13%提高到70%。吡咯硝丁在湿润的非无菌土壤中可持续30天，活性无可测量的损失。

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Control of Rhizoctonia solani on Cotton Seedlings with Pseudomonas fluorescens and With an Antibiotic Produced by the Bacterium.

A strain of Pseudomonas fluorescens antagonistic to Rhizoctonia solani was isolated from the rhizosphere of cotton seedlings. An antibiotic strongly inhibitory to R. solani was isolated from P. fluorescens cultures and identified as pyrrolnitrin (3-chloro-4-[2'-nitro-3'-chlorophenyl]-pyrrole). The antibiotic also inhibited growth of other fungi associated with the cotton seedling disease complex including: Thielaviopsis basicola, Alternaria sp., and Verticillium dahliae. A Fusarium sp. was only partially inhibited and Pythium ultimum was unaffected. Treating cottonseed with P. fluorescens or pyrrolnitrin at time of planting in R. solani-infested soil increased seedling survival from 30 to 79% and from 13 to 70%, respectively. Pyrrolnitrin persisted for up to 30 days in moist nonsterile soil with no measurable loss in activity.

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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.