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<p>Root rot and mosaic are two important diseases that pose a serious threat to cassava production. <i>Piriformospora indica</i> and Arbuscular Mycorrhizal Fungi (AMF) are root colonizing endophytic fungi with exceptional abilities for promoting growth and suppressing diseases in many crops. This study explores the potential of <i>P. indica</i> and AM fungus colonization in cassava to promote growth and suppress diseases. Cassava stem and root rot pathogens were isolated, characterized and subjected to pathogenicity tests. Two fungal isolates <i>Lasiodiplodia theobromae</i> and <i>Fusarium</i> sp. were identified as the major pathogens, with <i>Cunninghamella elegans</i> being a minor pathogen causing the disease. The percentage of weight loss during pathogenicity test ranged from 0.36% in the uninoculated control to 25% on inoculation with a combination of <i>Lasiodiplodia theobromae</i> and <i>Fusarium</i> sp. Both <i>P. indica</i> and AM fungus were able to colonize cassava roots, marking the first successful report of <i>P. indica</i> colonization in cassava. An increase in growth and yield along with a decrease in disease incidence was observed in <i>P. indica</i> and AM fungus inoculated plants, even when challenged with root rot pathogens. Plants treated with <i>P. indica</i>&#xa0;also showed a significant reduction in cassava mosaic disease severity and viral load compared to control plants marking the first report of cassava root rot disease management using beneficial fungal endophytes. The study suggests that <i>P. indica</i> can effectively be utilized as a plant growth promoter and a biocontrol agent to combat cassava mosaic disease.</p>

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Piriformospora indica and Arbuscular Mycorrhizal Fungus suppress fungal root rot and mosaic diseases of cassava

  • 期刊论文

  • 发表日期：

    2025年2月26日

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  • Akhila P. Subhash,
  • S. S. Veena,
  • T. Makeshkumar,
  • K. N. Anith

摘要

Root rot and mosaic are two important diseases that pose a serious threat to cassava production. Piriformospora indica and Arbuscular Mycorrhizal Fungi (AMF) are root colonizing endophytic fungi with exceptional abilities for promoting growth and suppressing diseases in many crops. This study explores the potential of P. indica and AM fungus colonization in cassava to promote growth and suppress diseases. Cassava stem and root rot pathogens were isolated, characterized and subjected to pathogenicity tests. Two fungal isolates Lasiodiplodia theobromae and Fusarium sp. were identified as the major pathogens, with Cunninghamella elegans being a minor pathogen causing the disease. The percentage of weight loss during pathogenicity test ranged from 0.36% in the uninoculated control to 25% on inoculation with a combination of Lasiodiplodia theobromae and Fusarium sp. Both P. indica and AM fungus were able to colonize cassava roots, marking the first successful report of P. indica colonization in cassava. An increase in growth and yield along with a decrease in disease incidence was observed in P. indica and AM fungus inoculated plants, even when challenged with root rot pathogens. Plants treated with P. indica also showed a significant reduction in cassava mosaic disease severity and viral load compared to control plants marking the first report of cassava root rot disease management using beneficial fungal endophytes. The study suggests that P. indica can effectively be utilized as a plant growth promoter and a biocontrol agent to combat cassava mosaic disease.