Pollen Morphology in Sorbus L. (Rosaceae) and Its Taxonomic Implications.
Pollen Morphology in Sorbus L. (Rosaceae) and Its Taxonomic Implications.
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DOI：
10.3390/plants12183318
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发表时间：
2023-09-20
期刊：
影响因子：
--
通讯作者：
Wang XR
中科院分区：
文献类型：
--
作者：
Li M;Tian CF;Idrees M;Pathak M;Xiong XH;Gao XF;Wang XR
花楸属Sorbus L.由于其形态变异、多倍性和种间杂交，蔷薇科中的植物在分类学上具有挑战性。本研究利用扫描电子显微镜（SEM）对花楸属6个亚属80种植物的花粉形态进行了观察，以探讨花楸属内的差异及其花粉特征。我们对三个定性和四个定量特征进行了聚类分析。结果表明，所研究的花楸属植物花粉为等极三孔沟。我们确定了五种类型的花粉形状：近扁球形，球形，近长球形，长球形和全长球形。研究种的花粉定向可分为5种类型：条纹状、条纹状、无条纹状、无条纹状和蜂窝状。有趣的是，在相同的亚属，不同的物种表现出多种类型的字符。聚类分析结果表明，80种花楸可分为6个类群，其中B类群仅由花楸亚属种组成。虽然花粉微形态本身不能提供足够的证据来建立花楸属内亚属的分类关系，但它们确实为种级分类处理提供了有价值的信息。
The genus Sorbus L. in the Rosaceae family is taxonomically challenging due to its morphological variation, polyploidy, and interspecific hybridization. In this study, we used scanning electron microscopy (SEM) to observe the pollen morphology of eighty species, representing six subgenera, in order to assess the differences within the genus Sorbus and its pollen characteristics. We conducted a cluster analysis on three qualitative and four quantitative characteristics. The results demonstrated that the pollen grains of the studied Sorbus species are isopolar and tricolporate. We identified five types of pollen shapes: suboblate, spheroidal, subprolate, prolate, and perprolate. The pollen ornamentation of the investigated species could be classified into five types: striate-perforate, striate, cerebroid-perforate, cerebroid, and foveolate. Interestingly, within the same subgenera, different species exhibited multiple types of characters. The cluster analysis indicated that all 80 species could be divided into six groups, with group B consisting exclusively of species from the subgenus Sorbus. Although pollen micro-morphologies alone do not provide sufficient evidence to establish the taxonomic relationships of the subgenera within Sorbus, they do offer valuable information for species-level taxonomic treatment.
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影响因子：
2.1
作者：
Nemeth, Csaba;Papp, Nora;Hoehn, Maria
通讯作者：
Hoehn, Maria
影响因子：
4.1
作者：
Lo, Eugenia Y. Y.;Donoghue, Michael J.
通讯作者：
Donoghue, Michael J.
影响因子：
2.5
作者：
Liao, Min;Ullah, Fazal;Gao, Xin-Fen
通讯作者：
Gao, Xin-Fen
影响因子：
0.9
作者：
HEBDA, RJ;CHINNAPPA, CC;SMITH, BM
通讯作者：
SMITH, BM
影响因子：
0.9
作者：
EIDE F
通讯作者：
EIDE F