title: Induced resistance in tomato fruit by γ-aminobutyric acid for the control of alternaria rot caused by Alternaria alternata.
abstract: The study investigated the effect of γ-aminobutyric acid (GABA) on the control of alternaria rot in tomato fruit and the possible mechanism involved. Our results showed exogenous GABA could stimulate remarkable resistance to the alternaria rot, while it had no direct antifungal activity against Alternaria alternata. Moreover, the activities of antioxidant enzymes, including peroxidase, superoxide dismutase and catalase, along with the expression of these corresponding genes, were significantly induced in the GABA treatment. The obtained data suggested GABA induced resistance against the necrotrophic pathogen A. alternata, at least in part by activating antioxidant enzymes, restricting the levels of cell death caused by reactive oxygen species. Meanwhile, the key enzyme genes of GABA shunt, GABA transaminase and succinic-semialdehyde dehydrogenase, were found up-regulated in the GABA treatment. The activation of the GABA shunt might play a vital role in the resistance mechanism underpinning GABA-induced plant immunity.
authors.affiliation: College of Biosystems Engineering and Food Science, Fuli Institute of Food Science, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang R & D Center for Food Technology and Equipment, Zhejiang University, Hangzhou 310058, People's Republic of China.
authors.forename: Jiali
authors.initials: J
authors.lastname: Yang
authors.affiliation: College of Biosystems Engineering and Food Science, Fuli Institute of Food Science, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang R & D Center for Food Technology and Equipment, Zhejiang University, Hangzhou 310058, People's Republic of China.
authors.forename: Cui
authors.initials: C
authors.lastname: Sun
authors.affiliation: College of Biosystems Engineering and Food Science, Fuli Institute of Food Science, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang R & D Center for Food Technology and Equipment, Zhejiang University, Hangzhou 310058, People's Republic of China.
authors.forename: Yangyang
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: College of Biosystems Engineering and Food Science, Fuli Institute of Food Science, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang R & D Center for Food Technology and Equipment, Zhejiang University, Hangzhou 310058, People's Republic of China.
authors.forename: Da
authors.initials: D
authors.lastname: Fu
authors.affiliation: College of Biosystems Engineering and Food Science, Fuli Institute of Food Science, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang R & D Center for Food Technology and Equipment, Zhejiang University, Hangzhou 310058, People's Republic of China.
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Zheng
authors.affiliation: College of Biosystems Engineering and Food Science, Fuli Institute of Food Science, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang R & D Center for Food Technology and Equipment, Zhejiang University, Hangzhou 310058, People's Republic of China. Electronic address: yuting@zju.edu.cn.
authors.forename: Ting
authors.initials: T
authors.lastname: Yu
mesh_terms: D000528:Alternaria; D060487:Alternariosis / Q000517:prevention & control*; D000935:Antifungal Agents / Q000494:pharmacology*; D005638:Fruit / Q000187:drug effects* / Q000382:microbiology; D018551:Solanum lycopersicum / Q000187:drug effects* / Q000382:microbiology; D010935:Plant Diseases / Q000382:microbiology*; D005680:gamma-Aminobutyric Acid / Q000494:pharmacology*
chemical_list: D000935:Antifungal Agents; D005680:gamma-Aminobutyric Acid
keywords: Alternaria alternata; GABA; GABA shunt; Induced resistance