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- Title
GENOTYPIC VARIABILITY OF PEANUT LINES IN RESPONSE TO WATER STRESS, BASED ON BIOCHEMICAL DESCRIPTORS.
- Authors
RODRIGUES ALVES, GERCKSON MACIEL; DE LIMA PEREIRA, JACQUELINE WANESSA; DA LUZ, LUCAS NUNES; DE LIMA, LIZIANE MARIA; DOS SANTOS, ROSEANE CAVALCANTI
- 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 × 2 (genotype × 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.
- Subjects
GENOTYPES; PEANUTS; WATER treatment plants; PLANT water requirements; CATALASE
- Publication
Revista Caatinga, 2016, Vol 29, Issue 3, p528
- ISSN
0100-316X
- Publication type
Article
- DOI
10.1590/1983-21252016v29n302rc