Exogenous Application of Elicitors Induces Biochemical Alterations and Develops Tolerance against Yellow Mosaic Disease in Mungbean

Sehrish Tariq, Khalid P. Akhtar, Amjad Hameed, Najeeb Ullah, Imran Amin, Ghulam abbas, Muhammad J. Asghar


Mungbean (Vigna radiata) is seriously affected by mungbean yellow mosaic disease (MYMD) caused by Mungbean yellow mosaic India virus (MYMIV) in the Indian subcontinent. The present study was conducted to evaluate the effectiveness of salicylic acid (SA) and benzothiadiazole (BTH) for the management of MYMD and to find their role in inducing alteration in different biochemical parameters in susceptible mungbean genotype VC3061A. Exogenous application of the elicitors resulted in delayed symptom development and reduced disease severity (DS). The severity index (SI) was higher on positive control plants while the minimum was observed in post combined application of BTH+SA, followed by BTH and SA application. Total phenolic contents (TPC) and malondialdehyde (MDA) increased significantly in virus inoculated plants of all treatments as compared to their healthy controls. SOD activity was increased significantly in BTH+SA treated plants but decreased in disease control and BTH treated virus inoculated plants. A significant decrease in catalase (CAT) activity, while an increase in peroxidase (POD) was observed in BTH+SA, treated virus inoculated plants. Protease and esterase activity were significantly increased in SA treated virus inoculated plants. Plant pigments exhibited decreased concentration in virus inoculated plants compared to non-inoculated plants under all the treatments except SA treated plants. Enhanced or suppressed levels of antioxidants suggest an association between constitutive induced levels of these enzymes. In this study, we also report for the first time the protein profiling of mungbean genotype VC3061A after the exogenous application of different combinations of elicitors. Proteomic analyses revealed the expression of two proteins phosphatase 2C 16-like isoform and capsid protein after MYMIV inoculation in SA and BTH+SA treated plants which may trigger signal transduction pathway and consequently induces resistance against MYMIV in V. radiata by activating PR protein.


Mungbean; MYMIV; elicitors; management; alterations


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DOI: 10.33687/phytopath.009.01.2862


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