Effect of NaCl salinity in the genotypic variation of cowpea (Vigna unguiculata) during early vegetative growth

Bernardo Murillo-Amador*, Enrique Troyo-Diéguez, José Luis García-Hernández, Raúl López-Aguilar, Narciso Ysac Ávila-Serrano, Sergio Zamora-Salgado, Edgar Omar Rueda-Puente, Cengiz Kaya

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

73 Scopus citations

Abstract

Twenty-five genotypes of cowpea (Vigna unguiculata L. Walp.) were tested for salt-tolerance at the vegetative growth stage in pot in the greenhouse experiments at salinity levels of 0, 85, and 170 mM NaCl. Plant survival was the main criterion for classifying genotypes. Other criteria included the ion concentration (Na+ and Cl-) in root and shoot and biomass accumulation. Four local accessions ('Paceño', 'Tardón', 'Sonorense', and 'Cuarenteño'), three accessions from California ('CB46', 'CB27', and 'CB3'), and one accession from the International Institute of Tropical Agriculture (IITA) ('IT82D-889') survived at concentrations of both 85 and 170 mM NaCl and were classified as salt-tolerant, while 'IT96D-666', 'IT89KD-288', and 'IT93K-734' from IITA were classified as salt-sensitive. One local accession ('Sesenteño'), three accessions from IITA ('PEPH-V Wes-85', 'IT86D-719', and 'IT95K-1090-12'), and one accession from California ('CB5') were classified as moderately salt-tolerant. Eight accessions from IITA ('IT96D-733', 'IT90K-277-2', 'IT91K-93-10', 'IT91K-118-20', 'IT90K-284-2', 'IT95K-1088-4', 'IT89KD-391', and 'IT94K-437-1') and one from California ('CB88') were classified as moderately salt-sensitive. Biomass was affected by both 85 and 170 mM NaCl in all groups of genotypes, however, salt-tolerant and moderately salt-tolerant genotypes showed higher biomass than genotypes classified as moderately salt-sensitive and salt-sensitive. In all genotypes Cl- concentration was higher in shoots than roots and increased as salinity increased. Similarly Na+ concentration increased with increasing salinity. However, in salt-tolerant and moderately salt-tolerant genotypes, Na+ concentration was more in roots than shoots, while in moderately salt-sensitive and salt-sensitive genotypes, Na+ was higher in shoots than roots.

Original languageEnglish
Pages (from-to)423-431
Number of pages9
JournalScientia Horticulturae
Volume108
Issue number4
DOIs
StatePublished - 25 May 2006

Keywords

  • Dry matter production
  • Plant survival
  • Sodium
  • Vigna unguiculata

Fingerprint

Dive into the research topics of 'Effect of NaCl salinity in the genotypic variation of cowpea (Vigna unguiculata) during early vegetative growth'. Together they form a unique fingerprint.

Cite this