Ontogeny, allometry and architecture of Psychotria tenuinervis (Rubiaceae)
AUTOR(ES)
Rosseto, Vanessa, Carneiro, Magda Silva, Ramos, Flavio Nunes, Santos, Flavio Antonio Maës dos
FONTE
Acta Bot. Bras.
DATA DE PUBLICAÇÃO
2013-12
RESUMO
We evaluated the ontogeny of the understory shrub Psychotria tenuinervis Müll.Arg., considering morphological and morphometric characters. Four ontogenetic stages were identified: seedling, juvenile, immature and adult (vegetative and reproductive phases). Size measurements and allometric relationships of the stem and crown were compared between the immature and adult stages. Diameter and total height of the stem, as well as crown depth and width, increased throughout the ontogenetic stages and differed among immature, vegetative adult and reproductive adult individuals. The number of branches was lower in immature individuals than in vegetative and reproductive adult individuals but did not differ between the last two. The bifurcation ratio did not vary during ontogenetic development. In general, allometric relationships between the stem and the crown were similar among the ontogenetic stages. Although there was a progressive increase in size during ontogenetic development, there was no change in the allometric relationships between the size variables and architecture of P. tenuinervis, indicating that the form of individuals does not change over the course of ontogeny.
Documentos Relacionados
- Biologia floral e sistema reprodutivo de Psychotria tenuinervis Muell. Arg. (Rubiaceae) na Floresta Atlântica, SE Brasil
- Phytochemical study of leaves of Psychotria prunifolia (Kunth) Steyerm (Rubiaceae)
- Estudo Fitoquímico das Folhas da Espécie Psychotria prunifolia (Kunth) Steyerm (Rubiaceae)
- Development and Structure of Bacterial Leaf Nodules in Psychotria bacteriophila Val. (Rubiaceae)
- Evidence for Cytokinin in Bacterial Leaf Nodules of Psychotria punctata (Rubiaceae)