<abstract xmlns="http://www.w3.org/1999/xhtml"> We studied the effects of sequentially applied salt stress and Pseudomonas syringae pv lachrymans (Psl) infection in cucumber (Cucumis sativus L.). Infection development, shoot and root growth potential, the concentrations of chlorophyll and proline as well as electrolyte leakage, lipid peroxidation and H2O2 production were determined. Cucumber plants were first exposed to salt stress and irrigated for seven days with 50 or 100 mM NaCl and thereafter inoculated by Psl. Abiotic stress compromised the defence response to pathogen and disease severity was the highest in 100 mM NaCl-treated plants. The reduced performance of salinized plants under biotic stress could be related to salt stressinduced plant growth inhibition with leaf expansion being the most sensitive to salinity, decreased chlorophyll content, increased electrolyte leakage and prolonged H2O2 accumulation in leaves implying perturbations in redox homeostasis. The response of NaCl-treated and control plants to bacterial infection differed in terms of H2O2 generation and lipid peroxidation. This study confirmed that proline is an important component of local and systemic responses to salt stress and infection. The results contribute to our knowledge of the nature of plant response to a combination of abiotic and biotic stresses</abstract>

We studied the effects of sequentially applied salt stress and Pseudomonas syringae pv lachrymans (Psl) infection in cucumber (Cucumis sativus L.). Infection development, shoot and root growth potential, the concentrations of chlorophyll and proline as well as electrolyte leakage, lipid peroxidation and H2O2 production were determined. Cucumber plants were first exposed to salt stress and irrigated for seven days with 50 or 100 mM NaCl and thereafter inoculated by Psl. Abiotic stress compromised the defence response to pathogen and disease severity was the highest in 100 mM NaCl-treated plants. The reduced performance of salinized plants under biotic stress could be related to salt stressinduced plant growth inhibition with leaf expansion being the most sensitive to salinity, decreased chlorophyll content, increased electrolyte leakage and prolonged H2O2 accumulation in leaves implying perturbations in redox homeostasis. The response of NaCl-treated and control plants to bacterial infection differed in terms of H2O2 generation and lipid peroxidation. This study confirmed that proline is an important component of local and systemic responses to salt stress and infection. The results contribute to our knowledge of the nature of plant response to a combination of abiotic and biotic stresses

Interaction Between Salt Stress and Angular Leaf Spot (pseudomonas syringae pv lachrymans) in Cucumber

Department of Plant Physiology and Biochemistry, Faculty of Biology and Environmental Protection, University of Lodz, Banacha 12/16, 90-237 Lodz, Poland

Computer Engineering Department, Technical University of Lodz, Stefanowskiego 18/22, 90-924 Lodz, Poland

Journal of Fruit and Ornamental Plant Research

We studied the effects of sequentially applied salt stress and Pseudomonas syringae pv lachrymans (Psl) infection in cucumber (Cucumis sativus L.). Infection...

Interaction Between Salt Stress and Angular Leaf Spot (pseudomonas syringae pv lachrymans) in Cucumber

Publié en ligne: 15 mai 2013

Pages: 5 - 16

DOI: https://doi.org/10.2478/v10032-012-0011-4

Mots clés
salinity, Pseudomonas syringae pv lachrymans, combination stress, cucumber

This content is open access.

Interaction Between Salt Stress and Angular Leaf Spot (pseudomonas syringae pv lachrymans) in Cucumber

Publié en ligne: 15 mai 2013

Pages: 5 - 16

DOI: https://doi.org/10.2478/v10032-012-0011-4

Mots cléssalinity, Pseudomonas syringae pv lachrymans, combination stress, cucumber

This content is open access.

Mots clés
salinity, Pseudomonas syringae pv lachrymans, combination stress, cucumber