LIMA BEAN (Phaseolus lunatus L.) SEEDS EXPOSED TO DIFFERENT SALT CONCENTRATIONS AND TEMPERATURES

Authors

  • Maria das Graças Rodrigues do Nascimento Department of Posgraduate in Agronomist, Universidade Federal da Paraíba, Areia, PB
  • Edna Ursulino Alves Department of Fitotecnia, Universidade Federal da Paraíba, Areia, PB
  • Maria Lúcia Maurício da Silva Department of Posgraduate in Agronomist, Universidade Federal da Paraíba, Areia, PB
  • Caroline Marques Rodrigues Department of Fitotecnia, Universidade Federal da Paraíba, Areia, PB

DOI:

https://doi.org/10.1590/1983-21252017v30n322rc

Keywords:

Lima bean. Germination. Vigor. Abiotic stress.

Abstract

Salinity problems are increasing in the semi-arid regions of northeastern Brazil. Thus, detailed studies of the region’s cultured crops, primarily salt-tolerant species, are important. Therefore, the aim of the present study was to evaluate the salt stress tolerance of lima bean (Phaseolus lunatus L.) seeds at different temperatures. This study was conducted in the Seed Analysis Laboratory, Agricultural Sciences Center, Federal University of Paraíba (Areia, PB, Brazil) by using seeds of four lima bean cultivars (Branca, Orelha de Vó, Rosinha, and Roxinha) in a randomized experimental design. Sodium chloride (NaCl) was used as a solute for salt-stress simulation at the following concentrations: 0.0 (control), 1.5, 3.0, 4.5, 6.0, 7.5, and 9.0 dS m-1; temperatures were maintained constant at 25°C, 30°C, and 35°C. Germination and vigor tests were performed to evaluate the treatment effects (first count, germination rate index, seedling length, and dry matter). Germination rate of lima bean seeds increased in salt concentrations up to 9 dS m-1, and seeds of Roxinha cultivar exhibited the highest salinity tolerance. The development of lima bean cultivar seedlings was negatively affected at 35°C under high-salinity conditions.

Author Biography

  • Edna Ursulino Alves, Department of Fitotecnia, Universidade Federal da Paraíba, Areia, PB
    Possui Graduação em Agronomia pela Universidade Federal da Paraíba (1996); Mestrado em Agronomia pela Universidade Federal da Paraíba (1999) e Doutorado em Agronomia (Produção e Tecnologia de Sementes) pela Universidade Estadual Paulista Júlio de Mesquita Filho (2003). Atualmente é professora Adjunta da Universidade Federal da Paraíba. Tem experiência na área de Agronomia, com ênfase em Produção e Beneficiamento de Sementes, atuando principalmente em Tecnologia de Sementes de Espécies Florestais.

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Published

21-03-2017

Issue

Section

Agricultural Engineering