Componentes de produção e fisiológicos em ecótipos de Vigna sob reposição híbrida

Abstract

The Vigna beans or cowpea is a crop of great socioeconomic importance for the Northeast region, where its cultivation is usuaty practiced by family farmers. In this region, the water resource, is limited is the frequent occurrence of drought stress in plants, which causes decreased productivity, precisely because derail the photosynthetic process. In this sense, the objective was with this work was to evaluate the growth , physiological and biochemical variables and production of beans Vigna genotypes under levels of irrigation. The research was conducted in the experimental area of the Department of Fruit Crops and Plant Ecophysiology, Campus IV, the State University of Paraíba, in the city of Catolé do Rocha- PB. The experiment consisted of a study of three genotypes Vigna (G1 = BRS Aracé, G2 = BR17 Gurguéia and G3 = BRS Marataoã) and four irrigation levels (40, 60, 80 and 100% of ETc), which the be combined, resulted in a 3 x 4 factorial arranged in randomized blocks with four replicates. Growth variables (leaf area and dry matter partition), physiological (gas exchange and chlorophyll fluorescence), biochemical (organic solutes and antioxidant enzymes) and production (weight of pods, pod length, number of grains were evaluated by pod and weight of green beans). The Vigna BRS Marataoã has high osmoprotetora action when the drought is intense, resulting in better tissue recovery after rehydration. The biochemical characteristics of Vigna genotypes BRS Aracé , BR17 Gurguéia and BRS Marataoã respond positively to the increased availability of soil water. Among the genotypes, the BRS Marataoã stands out for productivity with the highest weight of pods and green beans.