Palynotaxonomy of Centauropsis (Compositae, Vernonieae) an endemic genus from Madagascar
Palynotaxonomy of Centauropsis (Compositae, Vernonieae) an endemic genus from Madagascar
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DOI：
10.1080/00173134.2024.2310605
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发表时间：
2023-11
期刊：
影响因子：
0.9
通讯作者：
Higor Antonio-Domingues;B. Loeuille;I. Larridon;Morgan R Gostel;A. R. G. Simões
中科院分区：
文献类型：
--
作者：
Higor Antonio-Domingues;B. Loeuille;I. Larridon;Morgan R Gostel;A. R. G. Simões
矢车菊属（Centauropsis）是菊科（Compositae）的一个属，共有8种，均为马达加斯加特有种。该属植物的花粉信息几乎没有，迄今为止只有一个种的花粉被描述，这阻碍了对该属及其近缘类群的系统研究。本研究对矢车菊属8种植物中的6种进行了花粉形态和超微结构的研究。Centauropsis的花粉具3孔沟，具近裂沟，六线微网。种间差异主要表现在中轴长度、沟孔内孔形态、刺的形状和大小等方面。利用主成分分析（PCA）和聚类分析（UPGMA法和欧氏距离法）探讨了种内和种间的孢粉学特征及其变异之间的相关性。完整的孢粉学描述，测量和扫描电子显微镜（SEM）和光学显微镜（LM）图像提供了所有检查的物种。
Abstract Centauropsis is a genus of eight species in the family Compositae, all of which are endemic to Madagascar. There is almost no information about the pollen of this genus, with only one species having its pollen described to date, which hinders systematic studies involving this genus and closely related taxa. In this study, we comprehensively characterise the pollen of Centauropsis, with details on morphology and ultrasculpture for six of the eight species of the genus. The pollen of Centauropsis is here characterised as 3-colporate, with sublophate ornamentation and nanoreticulate sexine. The species differ from each other mostly in length of the axis, morphology of the colporus endoaperture, and spine shape and size. The correlation between palynological characters and their variation within and between species was explored using principal component analyses (PCA) and cluster analyses (unweighted pair group method with arithmetic mean [UPGMA] and Euclidean distance). Full palynological descriptions, measurements and scanning electron microscopy (SEM) and light microscopy (LM) images are provided for all examined species.