Uso de diodos emissores de luz sobre as características morfoanatômicas em mudas de Corymbia citriodora

Abstract

With the increase in Corymbia citriodora cultivation in Brazil, it is crucial to evaluate its characteristics in different environments of seedling production, given the different acclimatization strategies under the prevailing environmental conditions in its cultivation. This work aimed to evaluate distinct spectral qualities of LED lamps in morpho-anatomical characteristics in Corymbia citriodora seedlings. The work was conducted from August 2018 to January 2019, in a growth room belonging to the Federal University of Santa Maria, campus Frederico Westphalen, RS, Brazil. The experimental design used was completely randomized, where the treatments were composed of four spectral qualities of light from white, red (660 nm), blue (450 nm) and blue + red (40% + 60%) LED lamps, with light intensity of 72 µmol m-2 s-1 each bench. The use of LED lamps altered the values of leaf area index, chlorophyll contents, lower epidermis, leaf thickness and stomatal density of Corymbia citriodora.