Redox imbalance contributed differently to membrane damage of cucumber leaves under water stress and Fusarium infection

Yuming Sun, Yingrui Li, Min Wang, Chengzi Wang, Ning Ling, Luis Mur, Qirong Shen, Shiwei Guo

Allbwn ymchwil: Cyfraniad at gyfnodolynErthygladolygiad gan gymheiriaid

15 Dyfyniadau (Scopus)

Crynodeb

Redox-associated events are important in plant development and responses to environmental stresses. In this study, we investigated spatial redox responses of cucumber (Cucumis sativus L.) leaves to biotic stress (Fusarium infection) or abiotic stress (water stress). Plants were grown under hydroponic conditions and either treated with polyethylene glycol to simulate drought or infected with Fusarium oxysporum f. sp. cucumerinum. Both water stress and Fusarium infection restricted cucumber growth and were associated with cellular plasma-membrane damage, reactive oxygen species accumulation, and changes in antioxidants; however, the responses to each stress were distinctive. Under water stress, H2O2 generation at the leaf edge increased 29.7% compared with that at the centre but with Fusarium infection there was a relative 10.4% decrease at the edge. These changes correlated with changes in antioxidants and linked enzyme activities. The key sources of variation in oxidative events were defined by principal component analysis of all of the data and redox balance evaluations. We suggest that these spatial differences under water stress and Fusarium infection arise from discrete regulatory mechanisms, reflecting either developmental effect over the leaf regions or systemic anti-oxidative events occurred following infection
Iaith wreiddiolSaesneg
Tudalennau (o-i)171-180
Nifer y tudalennau10
CyfnodolynPlant Science
Cyfrol274
Dyddiad ar-lein cynnar29 Mai 2018
Dynodwyr Gwrthrych Digidol (DOIs)
StatwsCyhoeddwyd - 01 Medi 2018

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