Seasonal chlorophyll variations in Tabebuia avellanedae and Anadenanthera colubrine leaves
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Data
2010-01-01
Autores
Freiberger, Mariângela Brito [UNESP]
Castoldi, Gustavo [UNESP]
Marini, Deniele
Lang, Aleteia
Herzog, Neusa Francisca Michelon
Malavasi, Ubirajara Contro
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Resumo
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 ?g mL-1) to summer (151.13 ?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 μg mL-1) to the end of summer (average of 74.96 ?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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Semina:Ciencias Agrarias, v. 31, n. SUPPL. 1, p. 1343-1348, 2010.