Development, Characterization and Evaluation of Bionanoconjugates on Plant Growth and Defense System of Maize and Assessment of its Efficacy against Post Flowering Stalk Rot (PFSR) Disease
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Date
2018
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MPUAT, Udaipur
Abstract
“Development, Characterization and Evaluation of Bionanoconjugates on Plant Growth and Defense System of Maize and Assessment of its Efficacy against Post Flowering Stalk Rot (PFSR) Disease”
Kumaraswamy R.V.* Dr. Vinod Saharan The present study aims to develop the Cu-chitosan (Cu-CH), Si-chitosan (Si- CH), SA-chitosan (SA-CH) BNCs and evaluated their potency on plant growth and defense system of maize against PFSR disease caused by Fusarium verticillioides. Various BNCs were prepared by ionic gelation method by interactions of chitosan, tripolyphosphate (TPP), CuSO4, SiO2 and Salicylic acid (SA).The physicochemical characterizations of developed BNCs were carried out by DLS, FTIR, TEM, SEM, XRD and XPS. Laboratory synthesized BNCs substantially inhibited the mycelial growth and spore germination of F.verticillioides at 0.04 to 0.16% level. Seed treatment with BNCs (0.04 to 0.12%, w/v) has significantly enhanced maize seedling growth by up-regulating the enzymes responsible for mobilization of stored food such as α-amylase and proteases. The foliar treatment of BNCs (0.04 - 0.12%, w/v) caused significant improvement in the plant innate immunity by augmented antioxidant (superoxide dismutase, peroxidase and catalase) and defense related response (phenyl alanine lyase and polyphenol oxidase) along with higher deposition of lignin over control. The upregulated activities of antioxidant and defence enzymes in BNCs (0.04 to 0.16%) treated plants corroborated with decreased disease severity in pot and field conditions. Further, BNCs (0.01 to 0.12%) treatments exhibited growth promotry effect in terms of leaf area, shoot/ root length, root number, stem diameter and chlorophyll content in pot experiments. In field experiment, plant/ ear height, ear length, test weight and grain yield/plot were enhanced in BNCs (0.01 to 0.12%) treatments. Over all, in the present study laboratory synthesized SA-CH BNCs and Si- CH BNCs were promising agents for disease protection and sustainable yield.
Description
Development, Characterization and Evaluation of Bionanoconjugates, Plant Growth, Defense System , Maize, Assessment Efficacy against Post Flowering Stalk Rot Disease
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Citation
kumaraswamy, R.V. and saharan, V.