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| Mendonça,Claudia B. F.; Gonçalves-Esteves,Vania; Esteves,Roberto L.; Nunes,Alessandra D.. |
| The present work studied the pollinic characteristics of 22 species of Vernonanthura from Southeast Brazil. The pollen grains were acetolysed, measured, described and ilustrated under light, scanning and transmission electron microscopy. Based on the results, Vernonanthura was considered an euripolinic genus as pollen grains presented distinctive characteristics, mainly related to the ornamentation, the size and apertures of the pollen grains, which may serve as a further tool in the delimitation of the species. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Asteraceae; Palinology; Southeast Brazil; Vernonanthura; Vernoniinae. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042009000400004 |
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| Pio,Leila Aparecida Salles; Ramos,José Darlan; Pasqual,Moacir; Santos,Flavia Carvalho; Junqueira,Keize Pereira. |
| The study was carried out in order to evaluate the effect of temperature and in vitor stigma receptivity on regeneration of orange cultivar (Valência, Pêra and Natal) pollen. Two experiments were carried out, in the first the ideal temperature of germination was assessed. Pollen was obtained from flowers at the balloon stage and inoculated in culture medium with 10 g L-1 agar, 200 mg L-1 boric acid, 100 g L-1 sucrose, 800 mg L-1 calcium nitrate, pH adjusted to 6,5 and incubated in a BOD chamber at temperatures of 23, 24, 25, 26 and 27ºC during a 24-hour photoperiod. After 12 hours of incubation, the best temperature for pollen grain germination was 25ºC for all varieties. In a second experiment, in order to test the receptivity of the stigma, flowers were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Citrus sinensis; Palinology; Tissue culture. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542004000500016 |
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