Anatomy of the floral nectaries of selected species of Gardenieae (Rubiaceae)

Q4 Agricultural and Biological Sciences
M. D. Judkevich, R. M. Salas, Ana Maria Gonzalez
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引用次数: 0

Abstract

Abstract Rubiaceae is one of the five most species-rich families of Angiosperm, its flowers are characterized by a nectariferous disc surrounding the base of the style; however, there are almost no studies on anatomy of these structures in the family. The aim of this study was to describe for the first time the anatomy of the floral nectaries in the tribe Gardenieae (Rubiaceae). Flowers from Cordiera concolor, Genipa americana, Randia calycina, Randia ferox, Randia heteromera, Randia micracantha, and Tocoyena formosawere collected, photographed, and processed using conventional techniques for observation with optical and scanning electron microscopies. In all species the nectary is differentiated histologically into epidermis, nectary and sub-nectary parenchyma, and vascular bundles. Nectar is exuded via nectarostomata. The nectaries have reproductive function, and are structural and mesenchymal during the floral stage. Whereas after corolla has fallen they are persistent nectaries, with post-floral secretion and extranuptial function. In addition, floral visitors that appeared on open flowers and after corolla fall were recorded.
栀子科部分植物花蜜的解剖研究
茜草科(Rubiaceae)是被子植物中物种最丰富的五个科之一,其花的特征是花柱基部周围有一个花蜜盘;然而,几乎没有关于这些结构在家庭中的解剖研究。本文首次对栀子科(Rubiaceae)属植物的花蜜解剖结构进行了描述。收集了堇青花、美洲堇、花萼花、黄堇花、异花堇花、小红花花和台湾花等植物的花,用常规的光学和扫描电子显微镜进行了观察、拍照和处理。所有种的蜜腺在组织学上都分化为表皮、蜜腺和亚蜜腺薄壁组织和维管束。花蜜通过蜜腺口分泌。花期蜜腺具有生殖功能,是结构性的和间充质的。而在花冠掉落后,它们是持久的蜜腺,具有花后分泌和外露功能。此外,还记录了花冠凋落后和开放花上出现的访花现象。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Rodriguesia
Rodriguesia Agricultural and Biological Sciences-Horticulture
CiteScore
1.00
自引率
0.00%
发文量
55
审稿时长
13 weeks
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