SciELO - Scientific Electronic Library Online

 
vol.21 issue3As espécies de Machaerium Pers. (Leguminosae - Papilionoideae - Dalbergieae) ocorrentes no estado de São PauloFungal succession on leaves of Alchornea triplinervia (Spreng.) Muell. Arg. submerged in a stream of an Atlantic Rainforest in the state of São Paulo, Brazil author indexsubject indexarticles search
Home Pagealphabetic serial listing  

Services on Demand

Journal

Article

Indicators

Related links

Share


Brazilian Journal of Botany

Print version ISSN 0100-8404On-line version ISSN 1806-9959

Abstract

MALUF, Angela Maria  and  WIZENTIER, Betina. Aspectos fenológicos e germinação de sementes de quatro populações de Eupatorium vauthierianum DC. (Asteraceae). Revta. brasil. Bot. [online]. 1998, vol.21, n.3, pp.-. ISSN 1806-9959.  http://dx.doi.org/10.1590/S0100-84041998000300002.

Observations of flowering, fruit development and seed germination of four populations of E. vauthierianum in Paranapiacaba region showed a discrepancy of about 20 days in the time of flowering. In May, the earliest populations presented heads with flowers in different stages of development and frutification occurred in mid-June. The complete development from flower buds to ripe fruits lasted approximately 55 days. The number of fruits per head varied from 10 to 26 and the percentage of fertile fruits from 5.5 to 100%. Seed germination assays showed variations in the germination capability both within and among populations. Germination was shown to be greater at 20°C than 25°C and 30°C. Moreover, 12 hour photoperiod was shown to be more effective than full darkness for seed germination.

Keywords : Flowering; fruit development.

        · abstract in Portuguese     · text in Portuguese

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License