Influência do peso e da posição da semente no fruto sobre a qualidade de mudas de Senegalia bahiensis (Benth.) Seigler & Ebinger

Abstract

Senegalia bahiensis is a native species of the Leguminosae family and Mimosoideae subfamily and folk known as white jurema. Given the need for studies on the spread and formation of native species, this study aims to evaluate the influence of weight and seed position in the fruit on the quality of Senegalia bahiensis seedlings. The seeds were harvested from the fruits of remaining Caatinga vegetation at Castro Alves city, Bahia. The experiment was carried out in a completely randomized design in a 2 x 4 factorial scheme, two weight classes (<0,020g and > 0,020g) and four positions in the fruit (proximal, distal, 5th place and 6th place), resulting in eight treatments with 3 repetitions, each one consisting of a tray containing 30 tubes. Daily counts were performed for 15 days and, after 120 days of sowing measurements of height and diameter were performed. Seedling emergence, collar diameter, height, percentage of deformation of roots, root length and leaf area were evaluated. The collar diameter of the time responded just to seed weight; the height was influenced by the position on the fruit; the percentage of root deformations was influenced by both factors; regarding the length of the roots with a diameter greater than 2 mm, the weight and position influenced together and for the other parameters, there was no influence of any of the factors. The heavy seeds of Senegalia bahiensis developed superior quality seedlings.