Phytopathogenic Fungi and Their Active Metabolites With Bioherbicidal Potential Against the Invasive Alligator Weed, Alternanthera philoxeroides

IF 1.1 4区 农林科学 Q3 PLANT SCIENCES Journal of Phytopathology Pub Date : 2024-10-07 DOI:10.1111/jph.13406
Payel Basak, Wri Dutta, Jashaswi Basu, Mayukh Ghosh, Anwesha Chakraborty, Puja Ray
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Abstract

Alligator weed (Alternanthera philoxeroides), originally from South America, is a notorious semi-aquatic invasive species in many countries, including India. Due to its amphibious nature, it not only damages the aquatic environment but is also detrimental to the terrestrial ecosystem. To seek an environmentally sound control option for alligator weed, this study focused on selecting an appropriate mycoherbicidal agent. A series of steps from field survey-based collection, isolation and selection of promising fungal strains, followed by host range determination to biocontrol potential studies against the weed were undertaken. Twenty-three phytopathogenic fungi were isolated, and among these, the fungi with the highest herbicidal activity (> 90% disease severity) were subjected to morphological and molecular characterisation and identified as Alternaria alternantherae (= Nimbya alternanthera). The fungus and its crude metabolites were tested against 76 plant species, showing a relatively narrow host range. This fungal species is being reported from West Bengal, India, for the first time. Although the fungus has been considered as a potential biocontrol tool against alligator weed in countries such as Australia, Brazil and China, long-term, detailed research for A. alternantherae and its active metabolites to be developed as bioherbicides against alligator weed remains indispensable.

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植物病原真菌及其活性代谢物对入侵的鳄鱼草(Alternanthera philoxeroides)的生物草本杀虫潜力
鳄鱼草(Alternanthera philoxeroides)原产于南美洲,是包括印度在内的许多国家臭名昭著的半水生入侵物种。由于其水陆两栖的特性,它不仅破坏水生环境,还对陆地生态系统造成危害。为了寻求一种对环境无害的控制鳄鱼草的方法,本研究侧重于选择一种合适的杀菌剂。从实地调查收集、分离和筛选有前景的真菌菌株,到确定寄主范围,再到针对鳄鱼草的生物防治潜力研究等一系列步骤都在进行之中。分离出 23 种植物病原真菌,并对其中除草活性最高(病害严重程度达 90%)的真菌进行了形态学和分子鉴定,确定其为交替花叶互生菌(=Nimbya alternanthera)。该真菌及其粗代谢产物针对 76 种植物进行了测试,结果表明其寄主范围相对较窄。印度西孟加拉邦首次报告了这种真菌。虽然在澳大利亚、巴西和中国等国,该真菌已被视为一种潜在的生物防治鳄鱼草的工具,但要将交替花叶蓟马真菌及其活性代谢产物开发成生物除草剂来防治鳄鱼草,仍需进行长期、详细的研究。
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来源期刊
Journal of Phytopathology
Journal of Phytopathology 生物-植物科学
CiteScore
2.90
自引率
0.00%
发文量
88
审稿时长
4-8 weeks
期刊介绍: Journal of Phytopathology publishes original and review articles on all scientific aspects of applied phytopathology in agricultural and horticultural crops. Preference is given to contributions improving our understanding of the biotic and abiotic determinants of plant diseases, including epidemics and damage potential, as a basis for innovative disease management, modelling and forecasting. This includes practical aspects and the development of methods for disease diagnosis as well as infection bioassays. Studies at the population, organism, physiological, biochemical and molecular genetic level are welcome. The journal scope comprises the pathology and epidemiology of plant diseases caused by microbial pathogens, viruses and nematodes. Accepted papers should advance our conceptual knowledge of plant diseases, rather than presenting descriptive or screening data unrelated to phytopathological mechanisms or functions. Results from unrepeated experimental conditions or data with no or inappropriate statistical processing will not be considered. Authors are encouraged to look at past issues to ensure adherence to the standards of the journal.
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