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On the systematic position of the coliform bacteria responsible for stalk rot of maize
Author(s) -
SABET K. A.,
SAMRA A. S.,
ELSHAFEY H. A.
Publication year - 1964
Publication title -
annals of applied biology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.677
H-Index - 80
eISSN - 1744-7348
pISSN - 0003-4746
DOI - 10.1111/j.1744-7348.1964.tb03801.x
Subject(s) - biology , stalk , erwinia , strain (injury) , pathogenicity , pathogen , bacteria , microbiology and biotechnology , botany , horticulture , genetics , anatomy
SUMMARY Comparative studies were made of two isolates of the Egyptian strain of the maize stalk‐rot bacterium ( Erwinia carotovora f. zeae Sabet), one isolate of the Indian strain of the same pathogen, two isolates of the cause of stalk rot in U.S.A. named E. maydis , and several isolates of E. carotovora from different hosts and different parts of the world. It was shown that these pathogens are closely related in their cultural and morphological characters but somewhat variable in certain biochemical reactions. They agree in their pathogenicity and relation to environment. The differences between E. maydis of Kelman, Person & Hebert (1957) and E. carotovora were found to be well within strain variation and do not justify the creation of a new species. The stalk‐rot bacteria from U.A.R., India and U.S.A. are distinguished by their ability to attack certain graminaceous plants which no other strain of E. carotovora can infect. It is concluded on this ground that the name originally adopted by Sabet (1954), i.e. E. carotovora f. zeae should be maintained and applied to the organism causing stalk rot in U.S.A.