期刊
BOTANICAL JOURNAL OF THE LINNEAN SOCIETY
卷 171, 期 4, 页码 764-772出版社
OXFORD UNIV PRESS
DOI: 10.1111/boj.12024
关键词
Atlantic Rainforest; callus; glands; histochemistry; labellum; lip; nectar; orchid; pollination; secretion
资金
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico [131934/2009-0, 302452/2008-7]
- Consejo Nacional de Investigaciones Cientificas y Tecnicas (CONICET)
- SECyT (UNC)
- State of Sao Paulo Research Foundation as part of the Thematic Project Functional Gradient within the BIOTA/FAPESP Program - The Biodiversity Virtual Institute [03/12595-7]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [03/12595-7] Funding Source: FAPESP
Orchidaceae show enormous floral diversity. However, anatomical studies of nectary tissues relative to nectar composition and pollinators are scarce. This work aims to present a detailed anatomical study of the labellar nectary of Elleanthusbrasiliensis, analyse the chemical composition of its nectar and relate these findings to pollination biology. Basally, the labellum bears a pair of fleshy, whitish, ovoid calli on its adaxial surface. Nectariferous callus tissue consists of a papillate epidermis and enlarged subepidermal parenchyma cells with thin walls, large nuclei and dense cytoplasm which stained positively for hydrophilic substances, interpreted as pre-nectar. The paired calli lack vascular tissues, but at the point of callus insertion, the diameters of vascular bundles supplying the lip are larger. Nectar is secreted as droplets on the adaxial callus surface. It is produced in small quantities, c. 4L per flower. Callus cell contents tested negative for polysaccharides, lipids and phenolic compounds. The nectar is sucrose-dominant, as in other hummingbird-pollinated species. It is suggested that other ornithophilous species of Sobralieae have anatomically similar nectaries.(c) 2013 The Linnean Society of London, Botanical Journal of the Linnean Society, 2013, 171, 764772.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据