Journal
JOURNAL OF PHYTOPATHOLOGY
Volume 158, Issue 10, Pages 668-675Publisher
WILEY-BLACKWELL
DOI: 10.1111/j.1439-0434.2010.01678.x
Keywords
glutamate fermentation by-product; plant defence response; AJIFOL
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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.
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