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http://hdl.handle.net/1843/47809| Type: | Artigo de Periódico |
| Title: | Reproductive system of diplopterys pubipetala (malpighiaceae) plants from a savanna ecosystem |
| Authors: | Clivia Carolina Fiorilo Possobom Silvia Rodrigues Machado Elza Guimarães |
| Abstract: | Diplopterys pubipetala is a Neotropical Malpighiaceae species widely distributed in savanna and tropical semideciduous forests of Brazil. Its flowers are zygomorphic and show glands on calyx, corolla and androecium, which have been related with the attraction, orientation and reward to neotropical oil collecting bees. Nevertheless, previous studies showed differences in the behavior of floral visitors, acting as pollinators or as oil robbers. Additionally, plants from distinct populations may show functional hermaphrodites or male-sterile flowers, the last producing seeds by agamospermy. These data suggest a variation in the reproductive system among populations of D. pubipetala. So, the aims of this study were to determine the reproductive system of D. pubipetala plants from savanna population in order to confirm the existence of flexibility in the breeding system of this species and to identify the importance of floral visitors for seed set. For this we determined the pollen viability and stigma receptivity using conventional techniques in floral biology research; we also evaluated the morphology and size of pollen grains by anatomical sections of the anthers and the stigma surface by SEM; we performed field experiments to determine the mating system. In the studied area all the individuals of D. pubipetala showed flowers with high pollen viability and capability to develop seeds from outcrossing. The stigma receptivity was conditioned to the rupture of stigmatic cuticle, which depended on the bee activity.We also verified the efficiency of Monoeca bees in the pollen transportation and depositionon receptive surface of stigma. Our results indicated a predominance of allogamy with a strong dependence on biotic pollen vectors in D. pubipetala, although one plant in the study population showed mixed mating system, with seeds produced by agamospermy, self-pollination and cross-pollination. Our data confirm the existence of flexibility in the breeding system of Diplopterys pubipetala, with intra and interpopulational variation. |
| Subject: | Plantas -- Reprodução Polinização por abelhas Abelha -- Inseminação artificial |
| language: | eng |
| metadata.dc.publisher.country: | Brasil |
| Publisher: | Universidade Federal de Minas Gerais |
| Publisher Initials: | UFMG |
| metadata.dc.publisher.department: | ICA - INSTITUTO DE CIÊNCIAS AGRÁRIAS |
| Rights: | Acesso Aberto |
| URI: | http://hdl.handle.net/1843/47809 |
| Issue Date: | 2016 |
| metadata.dc.url.externa: | http://ijprb.com/journal%20%20vol%208-1.htm |
| metadata.dc.relation.ispartof: | The International Journal of Plant Reproductive Biology |
| Appears in Collections: | Artigo de Periódico |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| Reproductive system of diplopterys pubipetala (malpighiaceae) plants from a savanna ecosystem.pdf | 451.01 kB | Adobe PDF | View/Open |
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