Gas exchange and leaf area requirement in tall ‘Prata’ banana

The objective of this study was to evaluate the gas exchange and leaf area requirement for yield six tall ‘Prata’ banana genotypes, under semi-arid conditions. genotypes ‘Pacovan’ (AAB), ‘Pacovan Ken’ (AAAB), ‘Preciosa’ ‘Japira’ ‘PV79-34’ (AAAB) ‘Garantida’ (four tetraploid hybrids one triploid cultivar) were evaluated in two cycles, arranged a completely randomized design factorial scheme, with five replicates four usable plants per plot. For physiological characteristics, 6 x 12 2 arrangement adopted, evaluation periods reading times each period, design. Of phytotechnical characteristics measured, seven influenced by interaction between factors cultivar cycle. Internal CO2 concentration, net photosynthesis rate, instantaneous water use efficiency, carboxylation efficiency quantum recorded leaves are higher morning, favored stomatal conductance lower temperature resulting from meteorological conditions, while transpiration intrinsic increase afternoon. hybrid has production unit area, associated high transpiration, compared cultivars.