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Reactions of Soybean Leaves to Pseudomonas spp.
Author(s) -
ÉRsek T.,
Hevesi Mária
Publication year - 1983
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1111/j.1439-0434.1983.tb00538.x
Subject(s) - biology , pseudomonas syringae , phytoalexin , pseudomonas , strain (injury) , hypersensitive response , pseudomonadaceae , bacteria , cultivar , botany , pseudomonadales , microbiology and biotechnology , plant disease resistance , biochemistry , gene , genetics , anatomy , resveratrol
Comparative tests on the reactions of soybean cultivars to races of Pseudomonas glycinea were done. It was found that reaction denoted, on the basis of visible symptoms, intermediate between fully resistant and susceptible ones, was in accordance with, microscopic features observed as well as with phytoalexin content measured. The pattern of single cell death and the accumulated glyceollin level resembled rather the resistant than the susceptible plant response. Despite the delayed and weak resistant, hypersensitive‐like response of soybean leaves to infection, the bacteria multiplied in the intermediate combination similarly as in a compatible one. The strain of P. syringae isolated from, but non‐pathogenic to foxtail millet, initiated no hypersensitive reaction (HR), i. e. neither tissue necrosis nor glyceollin accumulation. However, this strain, unlike saprophytes, multiplied like the HR‐inducing strain of P. syringae from apricot: after a short increase it ceased to multiply by 48 h. These results suggested that some resistance mechanism unrelated to HR may account for resistance of soybean leaves to pseudomonads.