Premium
Differential stimulation of germination of sclerotia of Sclerotium cepivorum by cultivars of onion and its effect on white rot disease
Author(s) -
COLEYSMITH J R.,
REESE R A.,
GEORGY N. I.
Publication year - 1987
Publication title -
plant pathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.928
H-Index - 85
eISSN - 1365-3059
pISSN - 0032-0862
DOI - 10.1111/j.1365-3059.1987.tb02232.x
Subject(s) - sclerotium , germination , biology , cultivar , white rot , sowing , flavour , liliaceae , horticulture , agronomy , botany , food science , lignin
Differences were found in the ability of onion cultivars to stimulate the germination of sclerotia of Sclerotium cepivorum under UK conditions. The differences between European and Egyptian cultivars were particularly marked. Differences also occurred in the development of white rot disease in European and Egyptian cultivars. These differences were related to the pattern of growth of the cultivars and not to levels or types of flavour and odour compounds. The effect of the pattern of growth of plants on germination of sclerotia was confirmed in experiments with different types of planting material. Germination beneath plants grown from sets was particularly rapid, but very slow beneath plants produced by direct seeding. An experiment with plants grown under different levels of sulphate nutrition showed that low levels of flavour and odour compounds were associated with a weak capacity to stimulate the germination of sclerotia. No evidence was found to suggest that control of white rot disease by selection for growth features or for differences in flavour and odour characteristics would be a practicable proposition for the foreseeable future.