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Blackening on yam in response to Colletotrichum gloeosporioides
Author(s) -
WINCH J. E.,
JACKSON G. V. H.,
NEWHOOK F. J.,
COLE J. S.
Publication year - 1993
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.1365-3059.1993.tb01490.x
Subject(s) - appressorium , biology , colletotrichum gloeosporioides , colletotrichum , spore , fungus , botany , penetration (warfare) , cuticle (hair) , glomerella cingulata , dioscorea , horticulture , operations research , engineering , medicine , genetics , alternative medicine , pathology
A blackening confined to the cuticle and/or outer epidermal cell walls of mature leaves of Dioscorea alata was found to be associated with the appressoria of the fungus Colletotrichum gloeosporioides on plants subjected to high levels of inoculum in the field and to dense spore suspensions in controlled tests. The blackening occurred with little evidence of fungal penetration into the host cells. Preliminary analyses of the nature of the blackening detected melanin‐like compounds and suggest the involvement of phenolic compounds and water‐soluble chemicals, possibly enzymes, in the blackening process.