Bio-metabolites Mechanism for the Eco-friendly Management of Alternaria Black Spot Disease Through the Use of Bio-agents in Canola
文献类型： 外文期刊
第一作者： Naz, Effat
作者： Naz, Effat;Bilal, Muhammad;Jabran, Muhammad;Shafique, Ikhlas;Abbas, Amjad;Ali, Muhammad Amjad;Azeem, Farrukh
作者机构：
关键词：
Biocontrol agents; Alternaria Black Spot; Microbial consortia; Trichoderma harzianum;
期刊名称：JOURNAL OF CROP HEALTH
ISSN： 2948-264X
年卷期： 2025 年 77 卷 4 期
页码：
收录情况： SCI
摘要： Biocontrol agents (BCAs) represent a sustainable and eco-friendly approach to manage diseases in canola, aligning with the principles of organic agriculture. The present study aimed to evaluate the biochemical mechanisms and biocontrol potential of Trichoderma harzianum and Janthinobacterium sp., applied individually and in combination against Alternaria brassicae in canola. Their role in plant growth promotion was assessed as a sustainable solution for disease management and crop enhancement. The experiment was conducted on four canola varieties (Punjab, Rachna, Sandal, and Super) using a randomized complete block design (RCBD) under three replications. The seeds from three experimental groups were primed with different biocontrol agents: BCA1 (Janthinobacterium sp.), BCA2 (T. harzianum), and BCA3 (a combination of Janthinobacterium sp. and T. harzianum). Growth parameters, including root and shoot weights, lengths, leaf number, and area, were analyzed alongwith ionic (calcium, sodium, potassium), physiological (chlorophyll, carotenoids, water content), and biochemical markers (antioxidant enzymes: SOD, POD, CAT; hydrogen peroxide; and malondialdehyde). The results demonstrated that T. harzianum and Janthinobacterium sp. reduced disease severity by 12.6 and 3.29%, respectively, and enhanced grain yield by 17.58 and 13.68%. Interestingly, while Janthinobacterium sp. alone had a minimal effect on yield enhancement, its combination with T. harzianum significantly lowered disease severity by 25.92% and boosted grain yield by 37.97%. These findings suggest that the synergistic application of T. harzianum and Janthinobacterium offers a promising strategy for effective disease management and enhanced crop health in canola.
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