Articles
Effects of alkaline stress on growth and physiology of strawberry plants
Article number
1465_47
Pages
311 – 316
Language
English
Abstract
Alkaline stress poses a significant challenge to crop production worldwide, yet the physiological responses of strawberry plants to alkaline conditions remain incompletely understood.
This study investigated the effects of varying alkaline stress levels on photosynthetic efficiency, osmolyte accumulation, and antioxidant defense mechanisms in strawberry plants.
Plants were subjected to different concentrations (15-75 mM) of alkaline stress over a 48-h period.
Chlorophyll fluorescence parameters, including Fv/Fm, YII, ETR, and NPQ, were measured to assess photosynthetic performance.
Osmoregulatory responses were evaluated through quantification of soluble proteins and proline content, while oxidative stress responses were monitored via antioxidant enzyme activities (SOD, POD, CAT) and MDA. Results revealed that mild alkaline stress (15-30 mM) induced minimal changes in photosynthetic parameters, while concentrations exceeding 45 mM significantly reduced Fv/Fm and YII values, accompanied by increased NPQ. Time-dependent accumulation of osmoprotectants was observed, with rapid initial increases in proline and soluble protein levels, followed by stabilization under prolonged stress.
Antioxidant enzyme activities showed biphasic responses, with initial enhancement (3-6 h) followed by decline under severe stress (60-75 mM), concurrent with elevated MDA levels indicating membrane damage.
These findings demonstrate that strawberry plants possess adaptive mechanisms to cope with moderate alkaline stress, but experience significant physiological deterioration under severe conditions, providing valuable insights for improving strawberry cultivation in alkaline soils.
This study investigated the effects of varying alkaline stress levels on photosynthetic efficiency, osmolyte accumulation, and antioxidant defense mechanisms in strawberry plants.
Plants were subjected to different concentrations (15-75 mM) of alkaline stress over a 48-h period.
Chlorophyll fluorescence parameters, including Fv/Fm, YII, ETR, and NPQ, were measured to assess photosynthetic performance.
Osmoregulatory responses were evaluated through quantification of soluble proteins and proline content, while oxidative stress responses were monitored via antioxidant enzyme activities (SOD, POD, CAT) and MDA. Results revealed that mild alkaline stress (15-30 mM) induced minimal changes in photosynthetic parameters, while concentrations exceeding 45 mM significantly reduced Fv/Fm and YII values, accompanied by increased NPQ. Time-dependent accumulation of osmoprotectants was observed, with rapid initial increases in proline and soluble protein levels, followed by stabilization under prolonged stress.
Antioxidant enzyme activities showed biphasic responses, with initial enhancement (3-6 h) followed by decline under severe stress (60-75 mM), concurrent with elevated MDA levels indicating membrane damage.
These findings demonstrate that strawberry plants possess adaptive mechanisms to cope with moderate alkaline stress, but experience significant physiological deterioration under severe conditions, providing valuable insights for improving strawberry cultivation in alkaline soils.
Publication
Authors
W. Liu, F. Gao, X. Gao, L. Guo, G. Wang, H. Guo, X. Fan
Keywords
strawberry, alkaline salt stress, chlorophyll fluorescence, antioxidant enzyme, osmoregulation
Groups involved
- Division Vine and Berry Fruits
- Working Group Strawberry Culture and Management
- Division Sustaining Horticulture in a Changing World
- Division Horticulture for Human Health
- Division Plant Genetic Resources, Breeding and Biotechnology
- Division Greenhouse and Indoor Production Horticulture
- Division Precision Horticulture and Engineering
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