Departamento de Botânica, Instituto de Biociências, São Paulo State University, Rio Claro, SP, Brazil.
Ann Bot. 2011 Apr;107(4):611-9. doi: 10.1093/aob/mcr008. Epub 2011 Feb 2.
Abolboda (Xyridaceae) belongs to the Poales, a predominantly wind-pollinated order whose phylogeny has been widely studied in recent years. The reproductive biology of Abolboda pulchella and A. poarchon was studied to determine the main pollination system of these species, providing the first experimental data on reproduction in the Xyridaceae.
A field study was conducted, including observations on the morphology and biology of the flowers, insect visits and pollinator behaviour. Experimental pollination treatments were performed to assess agamospermy, spontaneous self-pollination and self-compatibility. Pollination success was determined by pollen tube growth, and reproductive success was assessed by fruit- and seed-set.
Abolboda pulchella and A. poarchon were pollinated by Apidae, Megachilidae and Halictidae bees. The floral resources were pollen and nectar that was produced by stylar appendages, an uncommon nectary type for monocotyledons. The species were self-compatible, and pollen tube growth from self-pollen was similar to that of cross-pollen. However, herkogamy prevented spontaneous selfing, rendering the plants dependent on the pollinator's activity. There was no production of seeds by agamospermy.
Melittophily is the main pollination system of these two Abolboda species. Nectar production was first recorded here for Xyridaceae, and along with self-compatibility, herkogamy and bee pollination, is an informative characteristic that can be used in future phylogenetic analyses of the family as well as Poales.
Abolboda（禾本科）属于禾本目，禾本目主要是风媒传粉植物，近年来对其系统发育进行了广泛研究。本研究旨在研究 Abolboda pulchella 和 A. poarchon 的生殖生物学，以确定这些物种的主要传粉系统，为禾本科的生殖生物学提供了第一个实验数据。
进行了野外研究，包括观察花的形态和生物学、昆虫访问和传粉者行为。进行了实验授粉处理，以评估无融合生殖、自发自交和自交亲和性。通过花粉管生长来确定授粉成功，通过果实和种子设置来评估生殖成功。
Abolboda pulchella 和 A. poarchon 由 Apidae、Megachilidae 和 Halictidae 蜜蜂授粉。花的资源是花粉和由花柱附属物产生的花蜜，这是单子叶植物中不常见的花蜜类型。这些物种是自交亲和的，自花粉的花粉管生长与异交花粉相似。然而，雌雄蕊异长阻止了自发自交，使植物依赖传粉者的活动。无融合生殖没有产生种子。
花蜜传粉是这两个 Abolboda 物种的主要传粉系统。这里首次记录了禾本科的花蜜产生，以及自交亲和性、雌雄蕊异长和蜜蜂传粉，这些特征是一个信息丰富的特征，可用于未来禾本科和禾本目系统发育分析。
