As attempt of elucidating the environmental factors that they control the plasticity floral fenotipic of Catasetum fimbriatum Lindley, climatics studies of the species began, through of the accompaniment of 45 individuals divided in three installed treatments. The first fifteen individuals, they were conditioned at green house where intense brightness prevailed (1300 at 1900 µmol/m²s), high temperatures (38ºC) and it lowers relative humidity of the air (35%). Such treatment was entitled treatment 1. The other collected individuals that were put in the pot, and that they constituted the treatment 2, they were submitted the low luminous intensity (400 at 650 µmol/m²s), to a smaller temperature (17ºC) and a relative humidity of the highest air (85%). The last fifteen individuals, presented the natural conditions of survival of the species, and they constituted in that way, the treatment 3 (luminous intensity between 500 at 800 µmol/m²s, temperature of 23ºC and a relative humidity of the highest air of 65%). At the end of the experiment, the great adaptability could be verified of the species to the differentiated environments, through the ecotipes formation.
Orchid; Catasetum; Ecotipes and Climate