Publicação: Variação sazonal de clorofilas em folhas de Tabebuia avellanedae e Anadenanthera colubrina
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Universidade Estadual de Londrina (UEL)
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The experiment had the aim of quantifying seasonal chlorophyll variation on leaves of Anadenanthera colubrina and Tabebuia avellanedae. The experiment used a randomized block design established as a 2 x 3 factorial (two species and three sampling seasons) with 5 replications. The concentrations of chlorophyll in leaves were performed at the end of winter, late spring, and summer. The content of chlorophyll a changed only for A. colubrina, bringing up from spring (117.52 mu g mL(-1)) to summer (151.13 mu g mL(-1)). For the two species, the proportion of chlorophyll b was higher between periods at the end of spring (average of 29.31 mu g mL(-1)) to the end of summer (average of 74.96 mu g mL(-1)) with close relationship with the decrease in global solar irradiance. The chlorophyll a/b relationship increased in late spring due to reduction of chlorophyll b content. A. colubrina showed greater adaptation to the studied environment.
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Acclimation, heliophytic species, luminosity
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Português
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Semina-ciencias Agrarias. Londrina: Universidade Estadual de Londrina (UEL), v. 31, p. 1343-1347, 2010.
