Data/hora: 09/06/2024 09:37:25

Provedor de dados: 	39	
País: 	Brazil	
Título: 	Fluctuating asymmetry of and herbivory on Poincianella pyramidalis (Tul.) L.P. Queiroz (Fabaceae) in pasture and secondary tropical dry forest	
Autores: 	Ribeiro,Viviane Andrade; Silva,Rosineide Nascimento da; Sousa-Souto,Leandro; Neves,Frederico de Siqueira.	
Data: 	2013-03-01	
Ano: 	2013	
Palavras-chave: 	Caatinga; Forest regeneration; Leaf miners; Plant-insect interactions; Tropical dry forests.	
Resumo: 	Plants subjected to stressful environments tend to be more asymmetric with reduced defenses and are therefore more vulnerable to herbivory. This study investigates the relationship between herbivory and fluctuating asymmetry (FA) in Poincianella pyramidalis in two contrasting habitat types in the Brazilian caatinga (shrublands). We tested the following hypotheses: that FA occurs in P. pyramidalis; that FA of P. pyramidalis leaves is greater in individuals located in pasture than in those located in secondary tropical dry forest; that herbivory by insects (leaf chewers and leaf miners) increases in parallel with increases in the level of FA; and that herbivory is more common in pasture than in secondary tropical dry forest. In each of the two environments, we sampled 20 plants and evaluated 400 leaflets. We submitted FA data to the Shapiro-Wilk test of normality, and we investigated the other variables using generalized linear models. We found that FA was present in all P. pyramidalis individuals evaluated but was greater in those located in the more degraded habitat (pasture). In addition, although herbivory was similar between the two habitats, there was positive relationship between FA and herbivory. This indicates that herbivores select plants that are more asymmetric, regardless of the type of habitat involved, which might be attributable to the mechanisms posited in the plant stress hypothesis.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062013000100003	
Editor: 	Sociedade Botânica do Brasil	
Relação: 	10.1590/S0102-33062013000100003	
Formato: 	text/html	
Fonte: 	Acta Botanica Brasilica  v.27 n.1 2013	
Fonte: 	info:eu-repo/semantics/openAccess