PHYSIOLOGICAL RESPONSES OF PEANUT GENOTYPES TO WATER DEFICIT
Among the environmental factors, water deficit affects several morphologicaland physiological processes in plants, which may affect crops’ growth anddevelopment, reflecting on the yield. Thus, the aim of this research wasto evaluate the physiological responses of peanut genotypes submitted towater d...
| Authors: | , , , , , , |
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| Format: | article |
| Status: | Published version |
| Publication Date: | 2019 |
| Country: | Brasil |
| Institution: | Associação Brasileira de Engenharia Sanitária e Ambiental (ABES) |
| Repository: | Revista Brasileira de Ciências Ambientais (Online) |
| Language: | Portuguese |
| OAI Identifier: | oai:ojs.www.rbciamb.com.br:article/580 |
| Online Access: | https://www.rbciamb.com.br/Publicacoes_RBCIAMB/article/view/580 |
| Access Level: | Open access |
| Keyword: | Água Arachis hypogaea L Cera epicuticular Fotossíntese Multivariada Transpiração Water Epicuticular wax Photosynthesis Multivariate Transpiration |
| Summary: | Among the environmental factors, water deficit affects several morphologicaland physiological processes in plants, which may affect crops’ growth anddevelopment, reflecting on the yield. Thus, the aim of this research wasto evaluate the physiological responses of peanut genotypes submitted towater deficit. The experimental design was a completely randomized blockwith treatments in a 12x2 factorial arrangement, with twelve genotypesand two hydric conditions, with 5 replications. To evaluate the effect ofstress, at 25 days after emergence (DAE) peanut plants were kept underwater deficiency for four days, while the controls were kept at 70% offield capacity. At 29 DAE, photosynthesis, transpiration rate, relativewater and epicuticular wax content were evaluated. The photosyntheticrate was lower for all water deficit genotypes, except for the 870 strain,which showed higher drought tolerance. Water deficit did not affect thetranspiration rate of Runner IAC 886, IAC OL3, IAC OL4 cultivars and 573,599, 870 breeding lines. Among the genotypes, there is variation in theamount of the epicuticular waxes under water-deficit conditions. In relation to anatomo-physiological aspects from the genotypes, it was concluded that lines 573 and 870 are highly tolerant to water deficiency; cultivars IAC OL3, IAC OL4, Runner IAC 886, and 599 and 967 lines are moderately tolerant, and IAC 503, IAC 505 and IAC Tatu-ST, and lines 322 and 506 are more sensitive to water stress during phase of flowering. |
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