@article{articleb291548a,
title   = {Thermoperiod affects the diurnal cycle of nitrate reductase expression and activity in pineapple plants by modulating the endogenous levels of cytokinins},
author = {Freschi, Luciano and Nievola, Catarina Carvalho and Rodrigues, Maria Aurineide and Domingues, Douglas Silva and Van Sluys, Marie-Anne and Mercier, Helenice},
year = {2009},
doi = {10.1111/j.1399-3054.2009.01283.x},
journal   = {Physiologia Plantarum}
}