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        Role of Riboflavin in Induced Resistance against Fusarium Wilt and Charcoal Rot Diseases of Chickpea

        Ratul Saikia,yadav mukesh kumar,Saju Varghese,Bhim Pratap Singh,Dip K Gogoi,Rakesh Kumar,Dilip K Arora 한국식물병리학회 2006 Plant Pathology Journal Vol.22 No.4

        Riboflavin caused induction of systemic resistance inchickpea against Fusarium wilt and charcoal rotdiseases. The dose effect of 0.01 to 20 mM riboflavinshowed that 1.0 mM concentration was sufficient formaximum induction of resistance; higher concentrationdid not increase the effect. At this concentration,riboflavin neither caused cell death of the host plant nordirectly affected the pathogen’s growth. In time courseobservation, it was observed that riboflavin treatedchickpea plants were inducing resistance 2 days aftertreatment and reached its maximum level from 5 to 7days and then decreased. Riboflavin had no effect onsalicylic acid (SA) levels in chickpea, however, riboflavininduced plants found accumulation of phenolsand a greater activities of phenylalanine ammonia lyase(PAL) and pathogenesis related (PR) protein, peroxidasewas observed in induced plant than the control. Riboflavin pre-treated plants challenged with thepathogens exhibited maximum activity of the peroxidases4 days after treatment. Molecular weight of thepurified peroxidase was 42 kDa. From these studies wedemonstrated that riboflavin induced resistance is PRproteinmediated but is independent of salicylic acid.

      • SCIEKCI등재

        Role of Riboflavin in Induced Resistance against Fusarium Wilt and Charcoal Rot Diseases of Chickpea

        Saikia Ratul,Yadav Mukesh,Varghese Saju,Singh Bhim Pratap,Gogoi Dip K,Kumar Rakesh,Arora Dilip K The Korean Society of Plant Pathology 2006 Plant Pathology Journal Vol.22 No.4

        Riboflavin caused induction of systemic resistance in chickpea against Fusarium wilt and charcoal rot diseases. The dose effect of 0.01 to 20 mM riboflavin showed that 1.0 mM concentration was sufficient for maximum induction of resistance; higher concentration did not increase the effect. At this concentration, riboflavin neither caused cell death of the host plant nor directly affected the pathogen's growth. In time course observation, it was observed that riboflavin treated chickpea plants were inducing resistance 2 days after treatment and reached its maximum level from 5 to 7 days and then decreased. Riboflavin had no effect on salicylic acid(SA) levels in chickpea, however, riboflavin induced plants found accumulation of phenols and a greater activities of phenylalanine ammonia lyase(PAL) and pathogenesis related(PR) protein, peroxidase was observed in induced plant than the control. Riboflavin pre-treated plants challenged with the pathogens exhibited maximum activity of the peroxidases 4 days after treatment. Molecular weight of the purified peroxidase was 42 kDa. From these studies we demonstrated that riboflavin induced resistance is PR-protein mediated but is independent of salicylic acid.

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