Abstract：
Studies of reproductive biology and resources availability to floral visitors by plant species are important to understand the plant-pollinator interactions that drive species adaptation. We aim to understand the relationship between reproduction mechanisms of Deuterocohnia meziana (Bromeliaceae) and pollinators. The species occurs in Bolivia and Paraguay, and it is the only species of the genus found in Brazil, where it is restricted to ironstone outcrops. These areas are currently threatened by the iron mining industry. Additionally, they face risks from fire occurrence and grazing by cattle. We analyzed the floral biology, reproductive system, phenology, and pollination ecology of a natural population of Deuterocohnia meziana, from ironstone outcrops in Brazil. The species exhibits diurnal anthesis, with stigma receptive throughout anthesis, and 77% of pollen viability. Deuterocohnia meziana produces relatively large amounts of nectar, especially early in the morning (32.8 ± 9.4 μl), with a mean sugar concentration of 23.5 (± 3.2) ºBrix. It is self-incompatible with a peak flowering occurring in August (dry season), although flowers are observed continuously throughout the year. The species exhibits two types of inflorescences, young and mature, among which an average of 13.1 and 3.6 flowers open per day, respectively. Hummingbirds and bees are the effective pollinators, although butterflies and ants also visit D. meziana flowers. The species is reliant on exogenous pollen and pollinators for fruit set. The continuous conservation of D. meziana populations and their communities is essential for preserving plant-pollinator mutualism and the floral community adapted to ironstone outcrops.
摘要：
研究植物物种对花卉游客的生殖生物学和资源可用性对于了解驱动物种适应的植物-传粉者相互作用非常重要。我们的目的是了解Deuterocohniameziana（凤梨科）的繁殖机制与传粉者之间的关系。该物种发生在玻利维亚和巴拉圭，它是在巴西发现的该属的唯一物种，仅限于铁矿露头。这些地区目前正受到铁矿业的威胁。此外,他们面临着火灾和牛放牧的风险。我们分析了花卉生物学，生殖系统,物候学,和黄牛自然种群的授粉生态学，来自巴西的铁石露头。该物种表现出昼夜的花期，在整个花期都有污名接受，和77％的花粉活力。Deuterocohniameziana产生相对大量的花蜜，特别是清晨（32.8±9.4μl），平均糖浓度为23.5(±3.2)º白利糖度。它与8月（旱季）的开花高峰不相容，尽管一年四季都在不断观察花朵。该物种表现出两种类型的花序，年轻而成熟,其中平均每天开放13.1和3.6朵花，分别。蜂鸟和蜜蜂是有效的传粉者，虽然蝴蝶和蚂蚁也参观D.meziana花。该物种依赖于外源花粉和传粉媒介来坐果。D.meziana种群及其群落的持续保护对于保持植物传粉者的共生和适应铁石露头的花卉群落至关重要。
