02498naa a2200313 a 450000100080000000500110000800800410001902200140006002400390007410000200011324501350013326000090026852015520027765000180182965000160184765000100186365000210187365000290189465300200192365300210194365300210196465300100198565300210199570000200201670000180203670000200205470000220207477300880209620611092017-01-26       2016    bl uuuu     u00u1 u    #d  a1983-40637 a10.1590/1983-40632016v46428292DOI1 aSOUZA, M. A. de  aPhysiological and biochemical characterization of mango tree with paclobutrazol application via irrigation.h[electronic resource]  c2016  aPaclobutrazol 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, nonreducing 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.  aPaclobutrazol  aIrrigação  aManga  aMangifera Indica  aRegulador de crescimento  aEnzima redutase  aFloral induction  aIndução floral  aMango  aReductase enzyme1 aMESQUITA, A. C.1 aSIMOES, W. L.1 aFERREITA, K. M.1 aARAÚJO, E. F. J.  tPesquisa Agropecuária Tropical, Goiâniagv. 46, n. 4, p. 442-449, oct./dec. 2016.