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First report on generalized pollination systems in Melastomataceae for the Andean páramos
Plant Species Biology ( IF 1.1 ) Pub Date : 2022-01-16 , DOI: 10.1111/1442-1984.12364
Naisla Manrique Valderrama 1, 2 , Isabela Galarda Varassin 3, 4 , Luan Salles Passos 3, 4 , María Eugenia Morales Puentes 2
Affiliation  

Melastomataceae is a megadiverse family with records of transitions from specialized to generalized pollination systems for several species. These transitions are associated with the colonization of new, unpredictable and/or impoverished pollinator habitats or habitats where specialized pollinators are scarce (e.g., in highland environments). The bee species diversity is low in highlands. Therefore, autonomous breeding systems such as apomixis and self-pollination emerge in these environments. In this paper, we studied the floral traits associated with the generalization of pollination systems and registered the floral visitors of two species in the Colombian Andes: Miconia cataractae and M. elaeoides. We investigated the breeding system of M. elaeoides. Both species presented small flowers, short anthers of medium pore size, and nectar-producing stomata on the base of the anthers. Miconia cataractae produced an average of 1.62 μl nectar/flower, a sugar concentration of 6.78%, whereas M. elaeoides produced 0.09 μl nectar/flower, a sugar concentration of 6.13%. We recorded a wide diversity of pollinators for both species, mainly insects from the orders Hymenoptera and Diptera. Miconia elaeoides presented a mixed breeding system and was also capable of setting fruits by apomixis. We conclude that flower and anther morphology, combined with nectar production, thus represent convergent traits resulting in a generalist pollination system shared by M. cataractae and M. elaeoides. Here, we presented the first generalist pollination system recorded for Miconia (and the Melastomataceae) in the Andes, the first report for a species from the small-pored section Amblyarrhena, and the first report for a species from the large-pored section Cremanium in Colombia.

中文翻译:

关于安第斯帕拉莫斯山松属植物广义授粉系统的第一份报告

Melastomataceae 是一个巨大的多样性家族,记录了几个物种从专门授粉系统到广义授粉系统的转变。这些转变与新的、不可预测的和/或贫困的传粉媒介栖息地或专门传粉媒介稀缺的栖息地(例如,在高地环境中)的殖民化有关。高地的蜜蜂物种多样性很低。因此,在这些环境中出现了自主育种系统,如无融合生殖和自花授粉。在本文中,我们研究了与授粉系统泛化相关的花卉特征,并登记了哥伦比亚安第斯山脉两个物种的花卉访客:Miconia cataractaeM. elaeoides。我们调查了M. elaeoides的繁殖系统. 两个品种都开出小花,中等孔径的短花药,在花药基部有产生花蜜的气孔。Miconia cataractae平均产生 1.62 μl 花蜜/花,糖浓度为 6.78%,而M. elaeoides产生 0.09 μl 花蜜/花,糖浓度为 6.13%。我们记录了这两个物种的广泛多样性的传粉媒介,主要是膜翅目和双翅目昆虫。Miconia elaeoides呈现出一个混合育种系统,也能够通过无融合生殖结果。我们得出结论,花和花药形态与花蜜生产相结合,因此代表了趋同性状,从而形成了由M. cataractaeM. elaeoides。在这里,我们介绍了安第斯山脉Miconia (和 Melastomataceae)记录的第一个通才授粉系统,第一个报告来自小孔部分Amblyarrhena的物种,以及第一个报告来自大孔部分Cremanium的物种哥伦比亚。
更新日期:2022-01-16
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