Structure of monomerous diaspores of Pandanus (Pandanaceae): further steps for interpretation of their nature

Q3 Environmental Science

Botanica Pacifica Pub Date : 2023-01-01 DOI:10.17581/bp.2023.12s05

Nikita S. Zdravchev, Alexey V. F. Ch. Bobrov, Mikhail S. Romanov, Petr S. Iovlev, Anton S. Timchenko, Anna A. Mikhaylova, Natalia D. Vasekha, Kirill V. Kuptsov, Alexey N. Sorokin, Galina L. Kolomeitseva

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Abstract

In order to reveal the structure of the monomerous diaspores of Pandanus, to clarify the position of the ovary and to determine its morphogenetic fruit type the fruits of P. austrosinensis and P. conglomeratus were studied. The fruiting carpel is differentiated into the proximal part (zone of the locule) and the distal part (pileus). In the proximal part, the exocarp is single-layered or lacking in case of carpel fusion, the mesocarp includes numerous scattered vascular bundles comprising 3 circles and is differentiated into peripheral (parenchymatous) and inner (sclerenchymatous) zones. The inner mesocarp and the single-layered sclerenchymatous endocarp comprise a stout stone. Since the structural type of the gynoecium and the nature of the female fructifications of Pandanus are currently undetermined their diaspores the studied species could be treated as monomerous drupes of Prunus type or as a fruiting carpel of polymerous pyrenarium of Butia type.

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香豆科香豆属植物单胞孢子的结构及其性质的进一步解释

为了揭示香豆属植物单孢子体的结构，明确子房的位置，并确定其形态发生的果实类型，本文对austrosinensis和P. glomeratus的果实进行了研究。实心皮分为近端部(室区)和远端部(皮柄)。近端外果皮单层或缺少心皮融合，中果皮包括大量分散的维管束，共3圈，分为外周(薄壁)和内(厚壁)区。内中果皮和单层厚壁内果皮组成坚硬的石头。由于目前尚不清楚香豆属植物雌蕊的结构类型和雌果的性质，因此可以将其视为李子型的单体核果或Butia型多聚荚果的心皮。

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

Botanica Pacifica Environmental Science-Ecology

CiteScore

1.40

自引率

0.00%

发文量

期刊介绍： Botanica Pacifica (BP) publishes peer-reviewed, significant research of interest to a wide audience of plant scientists in all areas of plant biology (structure, function, development, diversity, genetics, evolution, systematics), all levels of organization (molecular to ecosystem), and all plant groups and allied organisms (cyanobacteria, fungi, and lichens). BP requires authors to frame their research questions and discuss their results in terms of contemporary problems of plant biology. While the geographic focus of the journal is the Pacific region, research submissions that demonstrate clear linkages with other regions are welcome. BP aims to foster the exchange of research ideas between countries with diverse cultures and languages.