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Glutamate Fermentation By‐product Activates Plant Defence Responses and Confers Resistance Against Pathogen Infection
Author(s) -
Igarashi Daisuke,
Takeda Taito,
Narusaka Yoshihiro,
Totsuka Kazuhiko
Publication year - 2010
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1111/j.1439-0434.2010.01678.x
Subject(s) - biology , elicitor , fermentation , bacteria , plant defense against herbivory , microbiology and biotechnology , botany , biochemistry , gene , genetics
Abstract In the food industry, glutamate fermentation by‐product (GFB) is generated by purifying glutamate products from microbial fermentation. The potential applications of GFB for upgrading agricultural soil, for foliar fertility, and as plant plankton for shrimp have been studied. We examined the efficacy of GFB foliar application and determined that GFB treatment increased the resistance of Arabidopsis leaves to infection by bacterial pathogens. Microarray gene expression analysis of Arabidopsis leaves after treatment with GFB indicated that the expression of plant defence‐related genes increased. In Corynebacterium fermentation, the active substances for induction of the defence response were extracted or solubilized after treatment with heating under acidic conditions. This extract was also effective in strawberry and grape leaves for the induction of hydrogen peroxide production. These findings suggest that foliar application of GFB that contains elicitor molecules derived from fermentation bacteria is useful for plant protection in agricultural fields.