Survival niches of Pseudomonas savastanoi pv. glycinea, causal agent of bacterial blight in soybean (Glycine max L.)

IF 2.5 3区 农林科学 Q2 Agricultural and Biological Sciences Tropical Plant Pathology Pub Date : 2024-03-14 DOI:10.1007/s40858-024-00642-8
Luana Laurindo de Melo, Daniele Maria do Nascimento, José Marcelo Soman, João César Lourencetti da Silva, Maria Márcia Pereira Sartori, Antonio Carlos Maringoni, Tadeu Antônio Fernandes da Silva Júnior
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Abstract

Bacterial blight caused by Pseudomonas savastanoi pv. glycinea (Psg) is a prevalent disease in soybean crops worldwide, and crop rotation is a potential management strategy. However, the importance of alternative crops and soil as hosts of Psg is not well understood. This study aimed to assess the survival of Psg in four soil types, the phyllosphere, and rhizosphere of 12 crops rotated with soybean, and endophytic colonization of crops by Psg. The pathogenic strain Soj. 1462 of Psg, resistant to rifampicin, was used in all experiments, and culturing followed by PCR confirmed bacterial survival. Psg survived for a maximum of two days in all soil types. In both survival niches, phyllosphere and rhizosphere, sunn hemp, common bean, and turnip proved to be the crops with a shorter Psg survival period, lasting less than 28 days, while the remaining evaluated crops exhibited longer survival periods. In endophytic colonization, Psg survived for less than 35 days in these crops when inoculated in artificially wounded plants. When inoculated by spray in the same crops, the highest Psg survival was recorded up to 28 days. To reduce Psg inoculum, it is advisable to cultivate sunn hemp, common bean, and turnip in succession with soybean, given their comparatively lower recorded survival periods.

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大豆(Glycine max L.)细菌性枯萎病病原菌 Pseudomonas savastanoi pv. glycinea 的生存壁龛
由 Pseudomonas savastanoi pv. glycinea(Psg)引起的细菌性枯萎病是全球大豆作物的一种普遍病害,轮作是一种潜在的管理策略。然而,人们对替代作物和土壤作为 Psg 宿主的重要性还不甚了解。本研究旨在评估 Psg 在四种土壤类型、12 种与大豆轮作的作物的叶球和根球中的存活情况,以及 Psg 在作物中的内生定殖情况。病原菌 Soj.所有实验都使用了对利福平有抗性的 Psg 病原菌株 Soj.1462,培养后通过 PCR 验证了细菌的存活。Psg 在所有土壤类型中最多存活两天。在叶球层和根瘤层这两种存活壁龛中,苘麻、蚕豆和萝卜的 Psg 存活期较短,不到 28 天,而其他被评估作物的存活期较长。在内生菌定植中,当接种到人工损伤的植物中时,Psg 在这些作物中的存活期不到 35 天。通过喷雾接种到相同作物上时,Psg 的存活期最长可达 28 天。为了减少 Psg 接种量,建议将苘麻、蚕豆和萝卜与大豆连作种植,因为它们的存活期相对较短。
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来源期刊
Tropical Plant Pathology
Tropical Plant Pathology PLANT SCIENCES-
CiteScore
4.50
自引率
4.00%
发文量
61
审稿时长
6-12 weeks
期刊介绍: Tropical Plant Pathology is an international journal devoted to publishing a wide range of research on fundamental and applied aspects of plant diseases of concern to agricultural, forest and ornamental crops from tropical and subtropical environments.  Submissions must report original research that provides new insights into the etiology and epidemiology of plant disease as well as population biology of plant pathogens, host-pathogen interactions, physiological and molecular plant pathology, and strategies to promote crop protection. The journal considers for publication: original articles, short communications, reviews and letters to the editor. For more details please check the submission guidelines. Founded in 1976, the journal is the official publication of the Brazilian Phytopathology Society.
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