Data/hora: 08/06/2024 17:49:55

Provedor de dados: 	39	
País: 	Brazil	
Título: 	Effects of sex and altitude on nutrient, and carbon and nitrogen stable isotope composition of the endangered shrub Baccharis concinna G.M. Barroso (Asteraceae)	
Autores: 	Fernandes,G. Wilson; Duarte,Heitor Monteiro; Silveira,Fernando A. O.; Broetto,Fernando; Lüttge,Ulrich; Rennenberg,Heinz.	
Data: 	2017-06-01	
Ano: 	2017	
Palavras-chave: 	Cerrado; Campos rupestres; Dioecy; Plant sex; Resource allocation; Rupestrian grasslands; Serra do Cipó.	
Resumo: 	ABSTRACT Previous ecological studies of dioecious plant species have found that female plants preferentially occur at lower altitudes where there are typically better nutritional conditions, while male plants often occur in less favorable sites. We compared the ecophysiological performance of male and female plants in three populations of the dioecious Baccharis concinna, an endemic species of rupestrian grasslands of Serra do Cipó, in southeastern Brazil. We hypothesized that physiological differences between the sexes would explain the distribution patterns of the populations. Analyses of the tissue content of phosphorus (P), calcium (Ca), potassium (K) and sodium (Na), and carbon and nitrogen stable isotopes, were used to assess nutritional status and water use efficiency (WUE) in plant leaves, stems and roots of male and female plants in three populations located along an elevational gradient. Differences among populations were related to decreased nutrient levels and WUE at higher elevations, but an effect of sex was found only for %C, with male plants having slightly higher values. In conclusion, the sex ratios in the studied populations of B. concinna could not be attributed to differences in nutrient acquisition and WUE.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062017000200229	
Editor: 	Sociedade Botânica do Brasil	
Relação: 	10.1590/0102-33062017abb0020	
Formato: 	text/html	
Fonte: 	Acta Botanica Brasilica  v.31 n.2 2017	
Fonte: 	info:eu-repo/semantics/openAccess