Floral anatomy of Pseudartabotrys Pellegrin (Annonaceae), a monospecific genus endemic to Gabon
Floral anatomy of Pseudartabotrys Pellegrin (Annonaceae), a monospecific genus endemic to Gabon
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DOI：
10.5252/a2017n2a2
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发表时间：
2017-12-29
期刊：
影响因子：
0.8
通讯作者：
Bidault, Ehoarn
中科院分区：
文献类型：
--
作者：
Deroin, Thierry;Bidault, Ehoarn
本文对加蓬单型植物pseudarabotrys Pellegrin的花解剖进行了研究，以期更好地了解pseudosyncarpy的起源及其形态背景。花托维管系统中等发达，有部分花被皮层维管系统，但远不如番麻发达。花药组织复杂，背面有厚的皮下厚壁组织，使人联想到以前在乌瓦里亚（Uvaria scabrida Oliver）中发现的，其果实类似假合果。雌蕊花萼，1(2)-卵生心皮和一个外部合心器预示假合心果。雄蕊和雌蕊的血管系统是自由的，三分体和五分体都是自由的，这可能是木兰属植物的基础状况。摘要简述了一种新的核桃科食物体，它位于内花瓣的正面凹基部，起源于表皮，具有脂质海绵状框架，与脉脉无直接联系。我们强调了经典方法在地方性和可能濒临灭绝的分类群研究中的重要性，这些分类群往往是理解生物进化的关键，无论是通过获得的原始数据，还是通过他们进一步提出的实地和实验研究，与更广泛分布的分类群相比。
Floral anatomy of the monotypic Gabonese genus Pseudartabotrys Pellegrin was studied, in order to get a better understanding of the origin of pseudosyncarpy and its morphological context. Receptacle vasculature is moderately advanced with a partial perianth cortical vascular system, however much less developed than that of Annona L. Anther histology is complex, with a thick hypodermal sclerenchyma on the abaxial side, reminiscent of that previously recognized in Uvaria scabrida Oliver, whose fruit resembles a pseudosyncarp. Gynoecial anthotaxy, 1 (2)-ovulate carpels and an outer compitum foreshadow the pseudosyncarpous fruit. Androecial and gynoecial vasculatures are free and both trimerous and pentamerous, following the likely basal condition in Magnoliales. A new kind of food body for the Annonaceae, found at the adaxial concave base of the inner petals, epidermal in origin with a lipidic spongy frame and showing no direct connection with venation, is briefly described. We emphasized the significance of classical approaches in the study of endemic and possibly endangered taxa, which are often revealed to be critical in the understanding of biological evolution, both by the primary data obtained and by the field and experimental researches they further suggest, in comparison with more widely distributed taxa.