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ABA-dependent salt and drought stress improve strawberry fruit quality
Ellen Cristina Perin1, Rafael da Silva Messias2, Joyce Moura Borowski1
1Embrapa Clima Temperado, Rodovia BR 396, Km 78, Cx Postal 403, CEP 96001-970 Pelotas, Rio Grande do Sul, Brazil; Universidade Federal de Pelotas, Campus universitário S/N, Cx Postal 354, 96010-900 Pelotas, Rio Grande do Sul, Brazil.
Abstract:
Strawberry crop is very sensitive to osmotic stress conditions. We investigated the effect of the stress induced by mild drought (DS) and salt (SS) stresses, on molecular, physiological, and metabolic processes in the strawberry crop (Fragaria ananassa), cv. Camarosa. The results showed that the fruit yield was not affected. Mild DS and SS also resulted in an increased content of phenolics, anthocyanins, and l-ascorbic acid, and an increased antioxidant activity. These effects were accompanied by increased levels of ABA and its derivatives (phaseic and dehydrophasic acids), alongside the upregulation of several genes involved on their synthesis. Therefore, the results obtained in this study suggest that mild DS and SS improve the functional quality of strawberry fruits through and ABA-dependent mechanism.
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