TY - JOUR
T1 - Ethylene production in pepper (Capsicum annuum) leaves infected with Xanthomonas campestris pv. vesicatoria
AU - Ben-David, Anat
AU - Bashan, Yoav
AU - Okon, Yaacov
PY - 1986
Y1 - 1986
N2 - Xanthomonas campestris pv. vesicatoria, the causal organism of bacterial scab in pepper (Capsicum annuum) produced small amounts of ethylene when grown under low oxygen tensions in liquid culture. Ethylene was produced by bacterial scab lesion tissue in pepper, but not by bacterial speck lesion tissue in tomato caused by Pseudomonas syringae pv. tomato or by angular leaf spot lesion tissue in cucumber, caused by P. syringae pv. lachrymans. Direct correlations were found between ethylene production in diseased plants and the number of bacteria in the tissue and between the initial inoculum and leaf abscission and disease development. Young susceptible pepper leaves produced more ethylene than mature, less susceptible leaves after inoculation and the ethylene was produced mainly in the distal parts of the leaf blade around developing necrotic spots. Spraying with methionine increased ethylene production and disease severity, whereas spraying with indole acetic acid or aminooxyacetic acid reduced ethylene production, disease severity and leaf-abscission. It is suggested that the ethylene produced during bacterial scab infection contributes to the development of disease symptoms including leaf abscission.
AB - Xanthomonas campestris pv. vesicatoria, the causal organism of bacterial scab in pepper (Capsicum annuum) produced small amounts of ethylene when grown under low oxygen tensions in liquid culture. Ethylene was produced by bacterial scab lesion tissue in pepper, but not by bacterial speck lesion tissue in tomato caused by Pseudomonas syringae pv. tomato or by angular leaf spot lesion tissue in cucumber, caused by P. syringae pv. lachrymans. Direct correlations were found between ethylene production in diseased plants and the number of bacteria in the tissue and between the initial inoculum and leaf abscission and disease development. Young susceptible pepper leaves produced more ethylene than mature, less susceptible leaves after inoculation and the ethylene was produced mainly in the distal parts of the leaf blade around developing necrotic spots. Spraying with methionine increased ethylene production and disease severity, whereas spraying with indole acetic acid or aminooxyacetic acid reduced ethylene production, disease severity and leaf-abscission. It is suggested that the ethylene produced during bacterial scab infection contributes to the development of disease symptoms including leaf abscission.
KW - aminoxyacetic acid
KW - AOA
KW - IAA
KW - indole-3-acetic acid
UR - http://www.scopus.com/inward/record.url?scp=84985093761&partnerID=8YFLogxK
U2 - 10.1016/S0048-4059(86)80047-9
DO - 10.1016/S0048-4059(86)80047-9
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AN - SCOPUS:84985093761
SN - 0885-5765
VL - 29
SP - 305
EP - 316
JO - Physiological and Molecular Plant Pathology
JF - Physiological and Molecular Plant Pathology
IS - 3
ER -