SciELO - Scientific Electronic Library Online

 
vol.31 número1Diversidade e estrutura genética de populações em cajazeira (spondias mombin l.) no nordeste do BrasilSeleção genética em progênies híbridas de coqueiro índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Revista Brasileira de Fruticultura

versão impressa ISSN 0100-2945versão On-line ISSN 1806-9967

Resumo

DAMASCENO JUNIOR, Pedro Corrêa et al. Preferential reproduction mode of hermaphrodite papaya plant (Carica papaya L; Caricaceae). Rev. Bras. Frutic. [online]. 2009, vol.31, n.1, pp.182-189. ISSN 0100-2945.  http://dx.doi.org/10.1590/S0100-29452009000100025.

This research was done to study the reproductive system of papaya hermaphrodite plant based on the histochemical nature of pollen grain, stigma receptivity, in vivo pollen grain germination and pollen:ovule ratio. In the histochemical analysis, pollen grains were stained by using Sudan IV and I2KI solution ; the stigma receptivity was assessed by alpha-naphthtyl acetate solution in closed and opened flowers. Pollen germination and pollen tube growing were examined in flower buds near anthesis with 0.1% aniline blue. To estimate the pollen:ovule ratio , anthers from each flower bud were dissected and all pollen grains were counted; ovules were dissected from ovaries and were counted under stereomicroscope. The results indicated that papaya pollen grains are of lipidic nature; the stigmas were receptive before the opening and until 48 hours after opening; the pollen grains germinated and emitted polinic tube before flower opening and the pollen:ovule ratio indicated the predominance of autogamous reproductive system. These results indicate that hermaphrodite papaya trees is preferentially of optional autogamous with cleistogamy.

Palavras-chave : Carica papaya; cleistogamy; autogamy; pollen grain histochemistry; P:O ratio; stigma receptivity.

        · resumo em Português     · texto em Inglês     · Inglês ( pdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons