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The involvement of ethylene in vascular wilt diseases
Author(s) -
Pegg G. F.
Publication year - 1975
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.1744-7348.1975.tb00527.x
Subject(s) - ethylene , biology , vascular tissue , bacterial wilt , verticillium , pathogen , inoculation , botany , microbiology and biotechnology , horticulture , biochemistry , catalysis
Plants exhibiting a wilt syndrome induced by the vascular pathogens Verticillium albo‐atrum or Pseudomonas solanacearum produce increased amounts of ethylene which may or may not include a contribution from the pathogen. Resistant, infected tomato plants do not produce more ethylene in the absence of visible symptoms. Ethylene is produced rapidly in affected susceptible plants as symptoms appear suggesting a tissue wound response. No correlation could be demonstrated between ethylene evolution and loss of leaf turgor or stomatal density. Many of the symptoms of vascular wilt infection may be reproduced by ethylene. This suggests that ethylene functions as a phyto‐toxin. Gassing inoculated plants with ethylene may, however, protect against symptom development. A multiple role for ethylene involvement in pathogenesis is discussed in relation to host hydrolase activity.