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. 1980 Dec;66(6):1106–1109. doi: 10.1104/pp.66.6.1106

Ethylene: Indicator but Not Inducer of Phytoalexin Synthesis in Soybean 1

Inge Paradies 1,2, Jörg R Konze 1,2, Erich F Elstner 1,2,2, Jack Paxton 1,2
PMCID: PMC440798  PMID: 16661585

Abstract

Cell wall preparations (elicitors) from Phytophthora megasperma var. sojae increase C2H4 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 C2H4, 1-aminocyclopropane-1-carboxylic acid, stimulates C2H4 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 C2H4 formation in higher plants, inhibits elicitor-induced C2H4 formation by about 95% but has no effects on phenylalanine ammonia lyase or glyceollin accumulation. It was concluded that C2H4 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.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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