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Provedor de dados:  Acta Botanica
País:  Brazil
Título:  Effects of the parasitism of Struthanthus flexicaulis (Mart.) Mart. (Loranthaceae) on the fitness of Mimosa calodendron Mart. (Fabaceae), an endemic shrub from rupestrian fields over ironstone outcrops, Minas Gerais State, Brazil
Autores:  Mourão,Fabiana Alves
Jacobi,Claudia Maria
Figueira,José Eugênio Côrtes
Batista,Eugênia Kelly Luciano
Data:  2009-09-01
Ano:  2009
Palavras-chave:  Ironstone
Mimosa
Parasitism
Reproductive success
Struthanthus
Resumo:  Parasitic plants (mistletoes) may alter the growth, reproduction and physiology of their hosts. Mimosa calodendron (Fabaceae) is a legume abundant in rupestrian fields on ironstone outcrops, frequently attacked by the hemiparasite Struthanthus flexicaulis (Loranthaceae). The objective of this study was to evaluate the consequences of parasitism by S. flexicaulis on the fitness of M. calodendron. The intensity of parasitism and mortality on hosts of different sizes was evaluated, and foliage cover, fruit and seed set in parasitized and non-parasitized individuals were compared. More than 65% of a population of 1820 individuals was attacked. Host density positively influenced parasitism. The mortality and number of attacked hosts increased with their crown diameter. Heavily parasitized individuals showed 75 to 95% reduction of leaf cover and fruit production of 25% of those non-parasitized. Although no statistical difference was detected between the number of seeds per fruit, seed weight was lower in attacked plants. Parasitism by S. flexicaulis on M. calodendron may alter its population structure and dynamics, by reducing survival and fecundity rates.
Tipo:  Info:eu-repo/semantics/article
Idioma:  Inglês
Identificador:  http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062009000300023
Editor:  Sociedade Botânica do Brasil
Relação:  10.1590/S0102-33062009000300023
Formato:  text/html
Fonte:  Acta Botanica Brasilica v.23 n.3 2009
Direitos:  info:eu-repo/semantics/openAccess
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