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Inhibition of germination of Mycosphaerella brassicicola ascospores on young cabbage and cauliflower leaves
Author(s) -
Hartill W. F. T.,
Sutton P. G.
Publication year - 1980
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.1744-7348.1980.tb02974.x
Subject(s) - biology , germination , mycosphaerella , ascospore , botany , alternaria brassicicola , horticulture , spore , biochemistry , arabidopsis , gene , mutant
SUMMARY Symptoms of ringspot of brassicas, caused by Mycosphaerella brassicicola , rarely appeared on rapidly expanding leaves of cabbages and cauliflowers but were common on fully expanded leaves. M. brassicicola ascospores did not germinate, or germinated poorly, on expanding leaves or on recrystallised wax deposits taken from these young leaves. A high proportion germinated on expanded leaves, on waxes taken from expanded leaves and on various other surfaces in the absence of nutrients. A volatile metabolite, present in the younger leaves, appears to inhibit ascospore germination.