Abstract
Legumes are sensitive to salt stress, especially in the early phases of growth. Brassinosteroids (BRs) or proline (Pro) have been shown to improve salt stress tolerance in several plant species when given exogenously. Therefore, two pot experiments laid out in 4 × 3 factorial in a completely randomised design, replicated three times were carried out on snap bean (Phaseolus vulgaris L.) cv. Valentino to examine the roles of BRs or Pro in improving the salt tolerance of snap beans. The first factor included four saline irrigation water levels viz. 0.0, 20, 40, and 60 mM sodium chloride (NaCl), while the second factor involved foliar application with 0.1 µM BRs or 30 mM Pro or distilled water as control. The results revealed that saline irrigation water reduced chlorophyll, membrane stability, relative water content, and yield. Exogenous BRs or Pro alleviated salt stress by reducing uptake and translocation of Na+ and Cl− while enhancing plant K+ assimilation. Increased water status, chlorophyll content, and antioxidant enzyme activity (SOD, POD, CAT) in leaves of snap beans may contribute to improved salt tolerance. These findings suggested that foliar treatment of brassinosteroids or proline could be an effective strategy to improve snap bean salt tolerance.
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Claims 8
Claim · model-written summary
Saline irrigation water reduced chlorophyll, membrane stability and relative water content in snap bean.
Verbatim
e1“saline irrigation water reduced chlorophyll, membrane stability, relative water content, and yield”
e2“four saline irrigation water levels viz. 0.0, 20, 40, and 60 mM sodium chloride (NaCl)”
e5“snap bean (Phaseolus vulgaris L.) cv. Valentino”
Claim · model-written summary
Saline irrigation water reduced snap bean yield.
Verbatim
e1“saline irrigation water reduced chlorophyll, membrane stability, relative water content, and yield”
e2“four saline irrigation water levels viz. 0.0, 20, 40, and 60 mM sodium chloride (NaCl)”
e5“snap bean (Phaseolus vulgaris L.) cv. Valentino”
Claim · model-written summary
Foliar brassinosteroids reduced uptake and translocation of Na+ and Cl− in snap bean under salt stress.
Verbatim
e3“foliar application with 0.1 µM BRs or 30 mM Pro or distilled water as control”
e4“Exogenous BRs or Pro alleviated salt stress by reducing uptake and translocation of Na+ and Cl−”
e5“snap bean (Phaseolus vulgaris L.) cv. Valentino”
Claim · model-written summary
Foliar proline reduced uptake and translocation of Na+ and Cl− in snap bean under salt stress.
Verbatim
e3“foliar application with 0.1 µM BRs or 30 mM Pro or distilled water as control”
e4“Exogenous BRs or Pro alleviated salt stress by reducing uptake and translocation of Na+ and Cl−”
e5“snap bean (Phaseolus vulgaris L.) cv. Valentino”
Claim · model-written summary
Foliar brassinosteroids enhanced plant K+ assimilation in snap bean under salt stress.
Verbatim
e3“foliar application with 0.1 µM BRs or 30 mM Pro or distilled water as control”
e5“snap bean (Phaseolus vulgaris L.) cv. Valentino”
e6“while enhancing plant K+ assimilation”
Claim · model-written summary
Foliar proline enhanced plant K+ assimilation in snap bean under salt stress.
Verbatim
e3“foliar application with 0.1 µM BRs or 30 mM Pro or distilled water as control”
e5“snap bean (Phaseolus vulgaris L.) cv. Valentino”
e6“while enhancing plant K+ assimilation”
Claim · model-written summary
Water status, chlorophyll content and antioxidant enzyme activity increased in snap bean leaves under treatment.
Verbatim
e5“snap bean (Phaseolus vulgaris L.) cv. Valentino”
e7“Increased water status, chlorophyll content, and antioxidant enzyme activity (SOD, POD, CAT) in leaves of snap beans may contribute to improved salt tolerance”
Claim · model-written summary
Foliar brassinosteroids or proline could be an effective strategy to improve snap bean salt tolerance.
Verbatim
e0“foliar treatment of brassinosteroids or proline could be an effective strategy to improve snap bean salt tolerance”
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