Premium
Infection of stored celery plants by Centrospora acerina
Author(s) -
DAY J. R.,
LEWIS B. G.,
MARTIN SUSAN
Publication year - 1972
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.1744-7348.1972.tb05083.x
Subject(s) - appressorium , biology , chlamydospore , cuticle (hair) , spore , fungus , hypha , botany , colletotrichum acutatum , germ tube , plant cuticle , horticulture , inoculation , wax , biochemistry , genetics
SUMMARY Chlamydospores in tissue near the bases of plants and in attached soil particles were the main form of inoculum of Centrospora acerina (Hartig) Newhall found on celery plants prepared for storage. Most of these spores remained ungerminated for several weeks but subsequently formed germtubes, terminal appressoria and infection‐pegs, which usually penetrated the plant surface through either the intact cuticle or damaged areas. For several weeks after the beginning of storage the plants were highly resistant to infection. During this time, appressoria failed to penetrate the intact cuticle and, if the fungus entered through damaged areas, hyphal growth in tissue was suppressed. Infection was often found to be associated with abrasion or splitting of the cuticle in commercially stored plants and, in experiments, deliberate damage enhanced the probability of infection. The development of the disease was much slower at 2 d̀C than at 15 d̀C.