GENOTYPIC VARIABILITY OF PEANUT LINES IN RESPONSE TO WATER STRESS, BASED ON BIOCHEMICAL DESCRIPTORS

Authors

  • Gerckson Maciel Rodrigues Alves Department of Agricultural Science, Universidade Estadual da Paraiba, Campina Grande, PB
  • Jacqueline Wanessa de Lima Pereira Department of Agriculture, Universidade Federal Rural de Pernambuco, Recife, PE
  • Lucas Nunes da Luz Rural Development Institute, Universidade da Integração Internacional da Lusofonia Afro-Brasileira, Redenção, CE
  • Liziane Maria de Lima Biotechnology Laboratory, Embrapa Algodão, Campina Grande, PB
  • Roseane Cavalcanti dos Santos Biotechnology Laboratory, Embrapa Algodão, Campina Grande, PB

DOI:

https://doi.org/10.1590/1983-21252016v29n302rc

Keywords:

Arachis hypogaea L. Antioxidative enzymes. Organic solutes. Drought tolerance.

Abstract

Seven biochemical descriptors were used to estimate the genotypic variability of peanut in response to moderate water stress. Six genotypes, constituted by four lines and two cultivars, were grown in pots, each containing two plants. At 15 days after emergence (DAE), the treatment differentiation was carried out: Control-plants maintained with daily watering, and Stress-plants submitted to water stress by complete suspension of watering for 15 days. The experimental design was completely randomized with factorial scheme 6 x 2 (genotype x water treatments), with five replications. The biochemical variables evaluated were: catalase (CAT), ascorbate peroxidase (APX), guaiacol peroxidase (GPX), free proline, total carbohydrates, soluble proteins, and amino acids. Results obtained by biochemical analysis and estimation of genotypic variability indicated that proline is the most appropriate descriptor for selecting genotypes tolerant to water stress, which led to identification of L81V and L108V as promising lines for drought tolerance breeding program.

Author Biographies

  • Gerckson Maciel Rodrigues Alves, Department of Agricultural Science, Universidade Estadual da Paraiba, Campina Grande, PB
    Pós-graduação em Ciências Agrárias
  • Jacqueline Wanessa de Lima Pereira, Department of Agriculture, Universidade Federal Rural de Pernambuco, Recife, PE
    Departamento de Pós-graduação em Biotecnologia, Rede Nordeste de Biotecnologia (Renorbio), Universidade Federal Rural de Pernambuco, Recife, PE
  • Lucas Nunes da Luz, Rural Development Institute, Universidade da Integração Internacional da Lusofonia Afro-Brasileira, Redenção, CE
    Departamento de Agronomia, Universidade Federal do Cariri, Crato, CE
  • Liziane Maria de Lima, Biotechnology Laboratory, Embrapa Algodão, Campina Grande, PB
    Laboratório de Biotecnologia, Embrapa Algodão, Campina Grande, PB
  • Roseane Cavalcanti dos Santos, Biotechnology Laboratory, Embrapa Algodão, Campina Grande, PB
    Setor de Biotecnologia e Melhoramento de plantas oleaginosas e fibrosas

Downloads

Published

20-07-2016

Issue

Section

Agronomy