Chlorophyll fluorescence as a tool to select salinity-tolerant cowpea genotypes

  • Jaima Ribeiro de Andrade
  • Sebastião de Oliveira Maia Júnior
  • José Wilson da Silva Barbosa
  • Aryadne Ellen Vilar de Alencar
  • Raphael Silva Jovino
  • Ronaldo do Nascimento

Abstract

The use of saline water reduces the growth and productivity of crops, so the need for techniques that make possible the use of this resource such as the use of salinity tolerant genotypes and efficient selection methods are of great importance. Thus, this study aimed to evaluate the tolerance of cowpea (Vigna unguiculata L. Walp.) genotypes to salt stress, through the chlorophyll fluorescence analysis. The experiment was conducted in a protected environment at the Federal University of Campina Grande, Paraíba, Brazil, using a completely randomized design in a 2 x 10 factorial arrangement, with three replications, consisting of two levels of irrigation water salinity (0.6 and 5.1 dS m-1) and ten cowpea genotypes: (G1: MNCO1-649F-2-1, G2: MNCO3-736F-2, G3: PINGO DE OURO-1-2, G4: BRS GURGUÉIA, G5: BRS MARATAOÃ, G6: MNCO2-676F-3, G7: MNCO2-683F-1, G8: MNCO3-737F-5-4, G9: MNCO3-737F-5-9, and G10: BRS TUMUCUMAQUE). The stem length, stem diameter, SPAD index, and chlorophyll fluorescence transients were evaluated. The G2 and G4 genotypes had the lowest reductions in the growth, stem diameter, initial fluorescence, and primary and maximum photochemical efficiency of PSII, proving to be tolerant to salinity. Chlorophyll fluorescence is a tool that can be used in the selection of salinity-tolerant cowpea genotypes.

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Author Biographies

Jaima Ribeiro de Andrade
Doutoranda em Agronomia (PPGA), Centro de Ciências Agrárias (CECA), Universidade Federal de Alagoas (UFAL), Rio Largo, AL, Brasil.
Sebastião de Oliveira Maia Júnior
Doutor em Agronomia (PPGA), Centro de Ciências Agrárias (CECA), Universidade Federal de Alagoas (UFAL), Rio Largo, AL, Brasil.
José Wilson da Silva Barbosa
Mestre em Engenharia Agrícola, Universidade Federal de Campina Grande (UFCG), Campina Grande, PB, Brasil.
Aryadne Ellen Vilar de Alencar
Graduanda em Ciências Biológicas, Universidade Estadual da Paraíba (UEPB), Campina Grande, PB, Brasil.
Raphael Silva Jovino
Graduando em Agronomia, Universidade Federal da Paraíba (UFPB), Areia, PB, Brasil.
Ronaldo do Nascimento
Professor Dr. Departamento de Engenharia Agrícola, Universidade Federal de Campina Grande (UFCG), Campina Grande, PB, Brasil.
Published
18-09-2019
How to Cite
Andrade, J., Maia Júnior, S., Barbosa, J. W., Alencar, A. E., Jovino, R., & Nascimento, R. (2019). Chlorophyll fluorescence as a tool to select salinity-tolerant cowpea genotypes. Comunicata Scientiae, 10(2), 319-324. https://doi.org/10.14295/cs.v10i2.3012
Section
Original Article