Journal of Agriculture & Life Sciences

Regulator Growth Vegetative and Photosynthetic Parameters in Seedling Fig
João Paulo Tadeu Dias, Essione Ribeiro Souza, Kamila Almeida Monaco, Giuseppina Pace Pereira Lima, Aloísio Costa Sampaio, Elizabeth Orika Ono

Abstract
The aim of this work was to study the effect of the plant growth regulator, trinexapac-ethyl, on growth and photosynthesis in Ficuscarica L. The experimental design was a randomized block, considering a control (no application) and one or two applications of trinexapac-ethyl in seven concentrations in solution: 0; 62,5; 62,5 + 62,5; 125; 125 + 125; 250; 250 + 250 and 500 mg L- 1 distributed in four blocks. Were evaluated: plant height, canopy area, number of leaves per branch, branch length, number of internodes, rate of CO2 assimilation, transpiration rate, stomatal conductance, internal CO2 concentration, leaf temperature, use water efficiency, carboxylation activity of the enzyme ribulose 1,5-bisphosphate carboxylase, chlorophyll a, chlorophyll b and carotenoids. The use of the plant growth inhibitor applied once in a concentration of 500 mg L-1 trinexapac-ethyl decreased internode and shoot growth fig. Moreover, two applications of 250 and 500 mg L-1, pronounced way affected increasing photosynthesis, and increase the content of pigments (chlorophyll a, chlorophyll b and carotenoids) that participate in the photosynthetic process in plants fig.

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