Transgenic Tobacco Plants Overexpressing Chitinases of Fungal Origin Show Enhanced Resistance to Biotic and Abiotic Stress Agents | Zendy

María de las Mercedes Dana | Zendy; José A. PintorToro | Zendy; Beatriz Cubero | Zendy

Open Access

Transgenic Tobacco Plants Overexpressing Chitinases of Fungal Origin Show Enhanced Resistance to Biotic and Abiotic Stress Agents

Author(s) -

María de las Mercedes Dana,

José A. PintorToro,

Beatriz Cubero

Publication year - 2006

Publication title -

plant physiology

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.554

H-Index - 312

eISSN - 1532-2548

pISSN - 0032-0889

DOI - 10.1104/pp.106.086140

Subject(s) - biology , nicotiana tabacum , biotic stress , abiotic component , transgene , genetically modified crops , abiotic stress , chitinase , fungus , botany , resistance (ecology) , gene , microbiology and biotechnology , genetics , ecology

Genes encoding defense-related proteins have been used to alter the resistance of plants to pathogens and other environmental challenges, but no single fungal gene overexpression has produced broad-spectrum stress resistance in transgenic lines. We have generated transgenic tobacco (Nicotiana tabacum) lines that overexpress the endochitinases CHIT33 and CHIT42 from the mycoparasitic fungus Trichoderma harzianum and have evaluated their tolerance to biotic and abiotic stress. Both CHIT33 and CHIT42, individually, conferred broad resistance to fungal and bacterial pathogens, salinity, and heavy metals. Such broad-range protective effects came off with no obvious detrimental effect on the growth of tobacco plants.

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