苏云金芽孢杆菌对“哈斯”鳄梨炭疽病的生物防治潜力探讨

IF 2.8 3区农林科学 Q2 PLANT SCIENCES

Physiological and Molecular Plant Pathology Pub Date : 2025-04-30 DOI:10.1016/j.pmpp.2025.102724

Claudia Gabriela Magallón-Andalón , Montserrat Calderón-Santoyo , Rosendo Balois-Morales , Verónica Alhelí Ochoa-Jiménez , Paloma Patricia Casas-Junco , Graciela Guadalupe López-Guzmán , Iza Fernanda Pérez-Ramírez , Carla Fabiola Arias-Navarro , Pedro Ulises Bautista‐Rosales

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引用次数: 0

摘要

芽孢杆菌属细菌被认为是理想的生物防治剂，因为它们有不同的方法来控制某些病原体，而且不会影响鳄梨等水果。研究了苏云金芽孢杆菌AB7、AB21和AB30菌株对“哈斯”鳄梨炭疽病的防效。在对营养物质的作用竞争机制中，所有菌株对葡萄糖底物都发挥了这种竞争机制。所有测试菌株都表现出与病原菌gloeosporioides争夺空间的现象。在挥发性有机物的产生方面，这三种菌株由于产生挥发性而抑制了病原体的生长。在抗生素的生产方面，这三种菌株都没有显著地控制病原体的生长，可能是由于抗菌化合物的产量低。最后，在寄生方面，3株菌株产生水解酶β-1,3-葡聚糖酶并粘附在病原菌菌丝上。这三种菌株都能引起真菌菌丝变形，可能是由于生物防治剂对病原体的粘附、挥发性有机物、酶β-1,3-葡聚糖酶和菌株低浓度产生的某些抗生素的共同作用。所评价的菌株通过至少四种作用机制抑制gloeosporioides。

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Exploring the biocontrol potential of Bacillus thuringiensis against Colletotrichum gloeosporioides in 'Hass' avocado fruits

Bacteria of the Bacillus genus are considered ideal biocontrol agents because they have different ways of controlling certain pathogens and do not affect fruits such as avocados. This study aimed to determine biocontrol potential of Bacillus thuringiensis strains AB7, AB21 and AB30 against Colletotrichum gloeosporioides in 'Hass' avocado fruits. In the mechanism of action competition for nutrients, all strains exerted this mechanism for the glucose substrate. All strains tested showed competition for space against the pathogen C. gloeosporioides. Regarding the production of volatile organic compounds, the three strains managed to inhibit the growth of the pathogen due to the production of volatiles. Regarding the production of antibiotics, none of the three strains controlled the growth of the pathogen significantly, possibly due to a low production of antimicrobial compounds. Finally, for parasitism, the three strains produced the hydrolytic enzyme β-1,3-glucanase and adhered to the pathogen's mycelium. The three strains managed to cause deformations in the fungus hyphae, possibly due to the joint action of the adhesion of the biocontrol agents to the pathogen, the volatile organic compounds, the enzyme β-1,3-glucanase and some antibiotics that the strains produced in low concentrations. The evaluated strains inhibited C. gloeosporioides by using at least four action mechanisms.

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来源期刊

Physiological and Molecular Plant Pathology 生物-植物科学

CiteScore

4.30

自引率

7.40%

发文量

130

审稿时长

38 days

期刊介绍： Physiological and Molecular Plant Pathology provides an International forum for original research papers, reviews, and commentaries on all aspects of the molecular biology, biochemistry, physiology, histology and cytology, genetics and evolution of plant-microbe interactions. Papers on all kinds of infective pathogen, including viruses, prokaryotes, fungi, and nematodes, as well as mutualistic organisms such as Rhizobium and mycorrhyzal fungi, are acceptable as long as they have a bearing on the interaction between pathogen and plant.