Differential accumulation of γ‐aminobutyric acid in elicited cells of two rice cultivars showing contrasting sensitivity to the blast pathogen. (12th February 2014)

• Record Type: Journal Article
• Authors: Forlani, G.; Bertazzini, M.; Giberti, S.; Franken, P.
• Is Part Of: Plant biology. Volume 16:Number 6(2014:Nov.)
• Page Start: 1127
• Page End: 1132
• Publication Date: 2014-02-12
• Subjects: Botany -- Periodicals; Plants -- genetics -- Periodicals; Plants -- growth & development -- Periodicals; Plant Proteins -- Periodicals; Gene Expression Regulation, Plant -- Periodicals; Botanique -- Périodiques; 580
• DOI: 10.1111/plb.12165
• Languages: English
• ISSNs: 1435-8603

Abstract

<abstract abstract-type="main" id="plb12165-abs-0001"> <title>Abstract</title> <p>Intracellular free amino acid pools were quantified in suspension cultured cells of a blast‐sensitive and a blast‐resistant rice genotype at increasing times after treatment with <italic>Magnaporthe oryzae</italic> cell wall hydrolysates. Besides some expected variations in free phenylalanine, a remarkable early increase of γ‐aminobutyric acid (GABA) levels was evident in both cultivars. Glutamate decarboxylase activity and protein levels were unaffected. GABA homeostasis was recovered in the sensitive cultivar 48 h after the treatment. In contrast, a further GABA accumulation and a general increase of most amino acids was found at this later stage in the resistant genotype, which showed a larger decrease in cell viability as a consequence of elicitor addition. Data support a recently hypothesised role of GABA metabolism in the plant response to fungal pathogens.</p> </abstract>