Physiological and biochemical characterization of mango tree with paclobutrazol application via irrigation

Authors

  • Moisés Alves de Souza Bolsista Embrapa
  • Alessandro Carlos Mésquita Professor Dr. Universidade do Estado da Bahia
  • Welson Lima Simões Pesquisador Dr. Embrapa Semiárido
  • Kalline Mendes Ferreira Universidade do Estado da Bahia
  • Emanoel Fernado Jurema Araujo Bolsista Embrapa Semiárido

Keywords:

Mangifera indica L., reductase enzyme, floral induction.

Abstract

Paclobutrazol application in mango tree floral induction is followed by changes in the hormonal balance and  carbohydrates production. This study aimed at evaluating the physiological and biochemical variables of mango tree (Palmer cultivar) by applying paclobutrazol doses via irrigation. The experimental design was randomized blocks, with five paclobutrazol doses (0.7 g, 1.0 g, 1.3 g, 1.6 g and 1.9 g of a.i.per linear meter of canopy) and one additional treatment, with one dose in the conventional form of application (1.9 g of a.i. per linear meter of canopy), and four replicates. The variables analyzed were: photosynthesis rate; stomatal conductance; transpiration; leaf temperature; CO2 ratio; total protein content; reducing, non-reducing and total soluble sugars in leaf tissue and fruit; and nitrate reductase enzyme. The lowest values for photosynthesis rate and stomatal conductance were obtained with paclobutrazol applied via irrigation. The highest values for gas exchange were obtained with the lowest paclobutrazol doses applied via irrigation, showing that this kind of application is efficient and that it is possible to reduce the application dose via irrigation system. The highest carbohydrate contents in the leaf tissue were observed for the doses of 1.06 g and 1.09 g of a.i. per linear meter of canopy, applied via irrigation. The carbohydrate contents in fruits decreased in response to the paclobutrazol dose. The application methods and doses applied via irrigation did not influence the nitrate reductase activity.

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Published

2017-01-10

How to Cite

SOUZA, M. A. de; MÉSQUITA, A. C.; SIMÕES, W. L.; FERREIRA, K. M.; ARAUJO, E. F. J. Physiological and biochemical characterization of mango tree with paclobutrazol application via irrigation. Pesquisa Agropecuária Tropical [Agricultural Research in the Tropics], Goiânia, v. 46, n. 4, p. 442–449, 2017. Disponível em: https://revistas.ufg.br/pat/article/view/42829. Acesso em: 22 dec. 2024.

Issue

Section

Research Article