Abscisic Acid Suppression of Phenylalanine Ammonia-Lyase Activity and mRNA, and Resistance of Soybeans to Phytophthora megasperma f.sp. glycinea.
作者： Edmund W. B. Ward , David M. Cahill , Madan K. Bhattacharyya
DOI: 10.1104/PP.91.1.23
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摘要: Etiolated hypocotyls of the resistant soybean (Glycine max [L.] Merr.) cultivar Harosoy 63 became susceptible to Phytophthora megasperma (Drechs.) f.sp. glycinea (Hildeb.) Kuan and Erwin race 1 after treatment with abscisic acid. Susceptibility was expressed by increases in lesion size a major decrease accumulation isoflavonoid phytoalexin, glyceollin. In untreated hypocotyls, activity phenylalanine ammonia-lyase mRNA for this enzyme increased rapidly infection, but these were suppressed acid-treated hypocotyls. The results suggest possibility that biosynthesis glyceollin resistance response soybeans may be controlled at transcriptional level changes acid concentrations caused infection.
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