Thermoperiod affects the diurnal cycle of nitrate reductase expression and activity in pineapple plants by modulating the endogenous levels of cytokinins
Department of Botany, Institute of Biosciences, University of São Paulo, CEP 05508-000, São Paulo, SP, Brazil;Institute of Botany, C.P. 4005, 01061-970, São Paulo, SP, Brazil