Qualidade fisiológica de sementes crioulas de feijão-de-corda do Estado de Pernambuco

Abstract

The physiological quality of seeds is one of the factors responsible for the good development of the plant in the field. In addition, stress conditions (such as saline and water) during the germination phase can also affect seedling emergence and consequently the vegetative development of crops. Therefore, this work aimed to study the physiological quality of black bean seeds from Pernambuco State. These seeds were supplied by farmers and / or associations of farmers from Agreste and Sertão Pernambuco, the experiments were carried out at the CENLAG Plant Production Laboratory of the Garanhuns Academic Unit. The evaluation of seed biometrics was performed by measuring length, width and thickness. In addition to these parameters, the weight of 100 seeds and the water content were also measured. The physiological quality of the seeds was measured by germination parameters (IVG,% of germination and effect of water and saline stress on germination), as well as seedling length and dry mass. Creole seed samples of string beans from the municipalities of Canhotinho, Sao Joao, Garanhuns, Jucati, Brejinho and Serra Talhada were heterogeneous in color and size. The sample from Garanhuns presented the highest water content (15.05) and the smallest from Brejinho (2.56). In the germination percentage, there was variation using the two parameters (radicle emission and normal seedlings), where the sample of the municipality of Brejinho presented the best germination results (100% considering the radicle emission and 20% considering normal seedlings). Garanhuns and São João samples presented the worst 84% considering radicle emission and 1% considering normal seedlings respectively. The samples that were most affected by water and saline stress in germination and IVG of normal seedlings were from São João and Garanhuns, which did not obtain normal seedlings. Seedling growth was affected by saline and water stress, which caused reduction in shoot and root length, being the most severe salt stress. The seedlings from the Canhotinho sample are the most sensitive to saline stress in relation to shoot length and shoot and root dry mass.