Data/hora: 11/06/2024 12:02:32

Provedor de dados: 	39	
País: 	Brazil	
Título: 	Occurrence of homobaric and heterobaric leaves in two forest types of southern Brazil	
Autores: 	Boeger,Maria Regina Torres; Silva,Maiara Matilde; Nogueira,Guilherme; Alvarenga,Allan; Pereto,Suellen Silva.	
Data: 	2016-06-01	
Ano: 	2016	
Palavras-chave: 	Bundle sheath extension; Leaf morphological traits; Light stratification; Lowland Ombrophilous Dense Forest; Mixed Ombrophilous Forest.	
Resumo: 	ABSTRACT In ombrophilous forests, light stratification provokes different adjustments by plants for better use of the environmental conditions of each stratum. Among the morphological traits that vary with strata, the presence of bundle sheath extensions (BSEs) is related to water transport, photosynthesis, and leaf mechanical support and classifies leaves as homobaric or heterobaric. This study analyzed the proportion of these types of leaves in a Lowland Ombrophilous Dense Forest (LLODF) and a Mixed Ombrophilous Forest (MOF), and among the strata of each forest type. The morphological leaf traits of 89 LLODF tree species and 57 MOF tree species were examined. The proportion of homobaric and heterobaric leaves did not differ between forests. However, in both forest types, the distribution of species with heterobaric or homobaric leaves depended on strata, with heterobaric species occurring mainly in higher strata, and homobaric species in lower strata. Thus, light stratification acts as an ecological filter on the composition of the vegetation of these forests, favoring heterobaric species in places with higher light intensity and temperature, such as the highest strata of canopy. On the other hand, homobaric species are more frequent in lower strata, where light is less available and humidity higher.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062016000200304	
Editor: 	Sociedade Botânica do Brasil	
Relação: 	10.1590/0102-33062016abb0064	
Formato: 	text/html	
Fonte: 	Acta Botanica Brasilica  v.30 n.2 2016	
Fonte: 	info:eu-repo/semantics/openAccess