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Transgenic expression of plant chitinases to enhance disease resistance

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Abstract

Crop plants have evolved an array of mechanisms to counter biotic and abiotic stresses. Many pathogenesis-related proteins are expressed by plants during the attack of pathogens. Advances in recombinant DNA technology and understanding of plant–microbe interactions at the molecular level have paved the way for isolation and characterization of genes encoding such proteins, including chitinases. Chitinases are included in families 18 and 19 of glycosyl hydrolases (according to www.cazy.org) and they are further categorized into seven major classes based on their aminoacid sequence homology, three-dimensional structures, and hydrolytic mechanisms of catalytic reactions. Although chitin is not a component of plant cell walls, plant chitinases are involved in development and non-specific stress responses. Also, chitinase genes sourced from plants have been successfully over-expressed in crop plants to combat fungal pathogens. Crops such as tomato, potato, maize, groundnut, mustard, finger millet, cotton, lychee, banana, grape, wheat and rice have been successfully engineered for fungal resistance either with chitinase alone or in combination with other PR proteins.

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  1. Department of Biotechnology, School of Life Sciences, Pondicherry University, Kalapet, Puducherry, 605014, India

    Jean Cletus, Vaiyapuri Balasubramanian, Divya Vashisht & Natarajan Sakthivel

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  1. Jean Cletus
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  2. Vaiyapuri Balasubramanian
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Correspondence to Natarajan Sakthivel.

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Cletus, J., Balasubramanian, V., Vashisht, D. et al. Transgenic expression of plant chitinases to enhance disease resistance. Biotechnol Lett 35, 1719–1732 (2013). https://doi.org/10.1007/s10529-013-1269-4

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