Reproductive biology of Abolboda pulchella and A. poarchon (Xyridaceae: Poales)

Oriani, Aline; Scatena, Vera Lúcia

doi:10.1093/aob/mcr008

Cited by 13 publications

(9 citation statements)

References 48 publications

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“…Within the xyrids clade, there is empirical evidence of animal pollination in genera Abolboda and Xyris (Xyridaceae). The two Abolboda species studied in a Brazilian savanna are self-compatible and pollinated by bees, which forage for nectar and pollen (Oriani & Scatena 2011). While the two Xyris species offer only pollen as reward for bees and syrphids in high altitude grasslands vegetation within the Atlantic Forest domain (Freitas & Sazima 2006).…”

Section: Resultsmentioning

confidence: 99%

An overview on pollination of the Neotropical Poales

Wolowski

Freitas

2015

Rodriguésia

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Current phylogenetic hypotheses support that ancestral Poales were animal-pollinated and that subsequent shifts to wind pollination have occurred. Ten of the 16 Poales families are widely distributed in the Neotropics, however a comprehensive understanding of their pollination systems' diversity is still lacking. Here we surveyed studies on pollination biology of Neotropical species of Poales. Poaceae, Cyperaceae and Juncaceae are predominantly wind-pollinated but insect pollination also occurs. Thurniaceae and Thyphaceae fit on anemophily but empirical data are missing. Pollen flowers with poricidal anthers have evolved independently in Mayacaeae and Rapateaceae. Pollen-and nectar-flowers occur in Xyridaceae, which are mainly pollinated by bees. Eriocaulaceae flowers secrete minute quantity of nectar and are pollinated by "diverse small insects". Pollination of Bromeliaceae is carried out by a great variety of animal groups, mainly hummingbirds, and includes anemophily. The diversity in floral forms is very high within the order but more constant within the families. This trend indicates that many events of species diversification may have occurred without divergence in the pollination mode. Still, parallel shifts in pollination modes are found, including possible reversals to wind-or animal-pollination, changes in the type of pollinators (e.g. from hummingbirds to bee or bats) and the arising of ambophily.

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Section: Resultsmentioning

confidence: 99%

An overview on pollination of the Neotropical Poales

Wolowski

Freitas

2015

Rodriguésia

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“…Studies on the floral anatomy of Xyridaceae have been performed with a taxonomic focus only for Xyris (Sajo et al 1997;Rudall and Sajo 1999). The reproductive biology of Abolboda species has been studied by Oriani and Scatena (2011), who first demonstrated the production of nectar by stylar appendages in Xyridaceae and anatomically characterized these nectariferous structures. Within the Xyridaceae, stylar appendages also occur in Aratitiyopea and Orectanthe (Kral 1992(Kral , 1998 and constitute one of the characteristics that support the circumscription of the subfamily Abolbodoideae (Stevens 2011).…”

Section: Introductionmentioning

confidence: 99%

“…For this purpose, we used data already published about representatives of Xyridaceae, Eriocaulaceae, and Mayacaceae (Sajo et al 1997;Rudall and Sajo 1999;Rosa andScatena 2003, 2007;Carvalho et al 2009;Oriani and Scatena 2011), as well as original data obtained in this study.…”

Section: Introductionmentioning

confidence: 99%

Floral Anatomy of Xyrids (Poales): Contributions to Their Reproductive Biology, Taxonomy, and Phylogeny

Oriani

Scatena

2012

International Journal of Plant Sciences

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JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org.. Xyridaceae, Eriocaulaceae, and Mayacaceae form the xyrid clade, which is weakly supported in Poales. The floral anatomy of xyrid species was studied, to contribute to the understanding of the relationships within the group. Both Eriocaulaceae and Xyridaceae have petals with elongated epidermal cells with straight walls, epipetalous stamens, staminodes, anthers with longitudinal dehiscence, an endothecium with band-like thickenings, and a style vascularized by the dorsal carpellary bundles; these characteristics thus corroborate the close relationship of these groups indicated by phylogenetic analyses. Mayacaceae is distinguished by the presence of papillose epidermal cells in the petals, a reduced inner whorl of stamens, poricidal anthers, an endothecium lacking thickenings, a style and stigma vascularized by the dorsal and ventral carpellary bundles, and the presence of an obturator in the ovary wall. A reduction in the inner whorl of fertile stamens also occurs in Juncaceae and Cyperaceae, linking Mayacaceae to the cyperids. The stylar appendages of Orectanthe (Xyridaceae) have been shown to be nectariferous and anatomically similar to those of Abolboda, differentiating these two genera from Xyris (Xyridoideae) and confirming their placement in Abolbodoideae. Stylar appendages also occur in Eriocaulaceae, with the same function, position, and vascularization, and are therefore homologous structures, reinforcing the phylogenetic proximity between Eriocaulaceae and Xyridaceae.

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“…Videos and photographs were taken as archived records from these observations. We classified floral visitors according to their behaviour as: (i) ‘pollinators’ (when they contact anthers and stigmas, with a high frequency of visits); (ii) ‘occasional pollinators’ (when they carried pollen grains and contacted stigmas, but with a low frequency of visits); and (iii) ‘thieves’ (when they did not contact reproductive structures of flowers, but only collected nectar and/or pollen (Inouye ; Oriani & Scatena ). When none of these activities were observed, they were merely classified as ‘visitors’.…”

Section: Methodsmentioning

confidence: 99%

Reproductive biology and pollination ecology of Triplaris gardneriana (Polygonaceae): a case of ambophily in the Brazilian Chaco

2017

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Triplaris gardneriana (Polygonaceae) is a dioecious pioneer tree reported as insect-pollinated, despite possessing traits related to anemophily. Here, we analyse the possible roles of insects and wind on the pollination of this species to establish whether the species is ambophilous. We carried out observations of floral biology, as well as on the frequency and behaviour of pollinators visiting flowers in a population of T. gardneriana in the Chaco vegetation of Brazil. We conducted experimental pollinations to determine the maternal fertility of female plants and whether they were pollen-limited, and we also conducted aerobiological experiments to provide evidence of how environmental factors influence atmospheric pollen dispersal. The population comprised an area of approximately 152.000 m and was composed of 603 female and 426 male plants (sex ratio = 0.59:0.41). We observed 48 species of insects visiting flowers of T. gardneriana, of which the bees Scaptotrigona depilis and Apis mellifera scutellata were the most effective pollinators. We recorded pollen grains dispersed by wind on 74% of the glass slides placed on females, located at different distances (1-10 m) from male plants. Airborne pollen concentration was negatively correlated with relative humidity and positively correlated with temperature. Our observations and experimental results provide the first evidence that T. gardneriana is an ambophilous species, with pollen dispersal resulting from both animal and wind pollination. This mixed pollination strategy may be adaptive in T. gardneriana providing reproductive assurance during colonisation of sites with different biotic and abiotic conditions.

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Reproductive biology of Abolboda pulchella and A. poarchon (Xyridaceae: Poales)

Cited by 13 publications

References 48 publications

An overview on pollination of the Neotropical Poales

An overview on pollination of the Neotropical Poales

Floral Anatomy of Xyrids (Poales): Contributions to Their Reproductive Biology, Taxonomy, and Phylogeny

Reproductive biology and pollination ecology of Triplaris gardneriana (Polygonaceae): a case of ambophily in the Brazilian Chaco

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