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Salt tolerance is unrelated to carbohydrate metabolism in cowpea cultivars

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Abstract

Under salinity stress, plants commonly accumulate carbohydrates for osmotic adjustment to balance the excess accumulated ions and to protect biomolecules. We selected two cowpea cultivars with contrasting response to salinity, Pitiúba (salt-tolerant) and TVu (salt-sensitive), to investigate whether the salt tolerance could be associated with changes in carbohydrate accumulation and metabolism in leaves and roots during a long-term experiment. Two salt treatments (0 and 75 mM NaCl) were applied to 10-day-old plants grown in nutrient solution for 24 days. Despite some changes in carbohydrate accumulation and carbohydrate metabolism enzymes induced by salt stress, no consistent alterations in carbohydrates could be found in leaves or roots in this study. Therefore, we suggest that tolerance to salt stress is largely unrelated to carbohydrate accumulation in cowpea.

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Acknowledgments

The authors would like to thank the Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) for their financial support and the Coordenação de Aperfeiçoamento de Pessoal de Nivel Superior (CAPES) for a scholarship to S.C. Praxedes during his PhD studies.

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Author notes

  1. Sidney Carlos Praxedes

    Present address: Unidade Acadêmica Especializada em Ciências Agrárias, Universidade Federal do Rio Grande do Norte, Macaíba, Rio Grande do Norte, Brazil

Authors and Affiliations

  1. Departamento de Fitotecnia, Universidade Federal do Ceará, Fortaleza, Ceará, Brazil

    Sidney Carlos Praxedes

  2. Departamento de Engenharia Agrícola, Universidade Federal do Ceará, INCTSal/CNPq, Fortaleza, Ceará, Brazil

    Claudivan Feitosa de Lacerda

  3. Departamento de Bioquímica e Biologia Molecular, Universidade Federal do Ceará, INCTSal/CNPq, Caixa Postal 6039, Fortaleza, Ceará, 60455-970, Brazil

    Thalita Montoril Ferreira, José Tarquinio Prisco & Enéas Gomes-Filho

  4. Departamento de Biologia Vegetal, Universidade Federal de Viçosa, Vicosa, Minas Gerais, 36571-000, Brazil

    Fábio Murilo DaMatta

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  1. Sidney Carlos Praxedes
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Correspondence to Enéas Gomes-Filho.

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Communicated by J. Zwiazek.

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Praxedes, S.C., de Lacerda, C.F., Ferreira, T.M. et al. Salt tolerance is unrelated to carbohydrate metabolism in cowpea cultivars. Acta Physiol Plant 33, 887–896 (2011). https://doi.org/10.1007/s11738-010-0615-6

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  • DOI: https://doi.org/10.1007/s11738-010-0615-6

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