Ethylene: indicator but not inducer of phytoalexin synthesis in soybean.
Identifieur interne : 002E64 ( Main/Exploration ); précédent : 002E63; suivant : 002E65Ethylene: indicator but not inducer of phytoalexin synthesis in soybean.
Auteurs : I. Paradies [Allemagne] ; J R Konze ; E F ElstnerSource :
- Plant physiology [ 0032-0889 ] ; 1980.
Abstract
Cell wall preparations (elicitors) from Phytophthora megasperma var. sojae increase C(2)H(4) formation, phenylalanine ammonia lyase activity, and glyceollin accumulation in soybean cotyledons within about 1.5, 3, and 6 hours after treatment, respectively. The immediate precursor of C(2)H(4), 1-aminocyclopropane-1-carboxylic acid, stimulates C(2)H(4) formation like the elicitor within 1.5 hours after administration, whereas phenylalanine ammonia lyase activity and glyceollin concentration remain unchanged. Aminoethoxyvinylglycine, a specific inhibitor of C(2)H(4) formation in higher plants, inhibits elicitor-induced C(2)H(4) formation by about 95% but has no effects on phenylalanine ammonia lyase or glyceollin accumulation. It was concluded that C(2)H(4) is a signal accompanying the specific recognition process which finally leads to the induction of phytoalexin formation, but it is not functioning as a link or messenger in the induction sequence of glyceollin accumulation.
DOI: 10.1104/pp.66.6.1106
PubMed: 16661585
PubMed Central: PMC440798
Affiliations:
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The immediate precursor of C(2)H(4), 1-aminocyclopropane-1-carboxylic acid, stimulates C(2)H(4) formation like the elicitor within 1.5 hours after administration, whereas phenylalanine ammonia lyase activity and glyceollin concentration remain unchanged. Aminoethoxyvinylglycine, a specific inhibitor of C(2)H(4) formation in higher plants, inhibits elicitor-induced C(2)H(4) formation by about 95% but has no effects on phenylalanine ammonia lyase or glyceollin accumulation. 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The immediate precursor of C(2)H(4), 1-aminocyclopropane-1-carboxylic acid, stimulates C(2)H(4) formation like the elicitor within 1.5 hours after administration, whereas phenylalanine ammonia lyase activity and glyceollin concentration remain unchanged. Aminoethoxyvinylglycine, a specific inhibitor of C(2)H(4) formation in higher plants, inhibits elicitor-induced C(2)H(4) formation by about 95% but has no effects on phenylalanine ammonia lyase or glyceollin accumulation. 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