伊朗芸苔科芸苔科、堇科、紫苔科和斜花科若干种花粉形态及其分类意义

IF 1.4 4区 地球科学 Q3 PALEONTOLOGY
M. Ranjbar, Somayeh Karami
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引用次数: 2

摘要

摘要:采用光镜和扫描电镜对芸苔科(brassicae)、金缕科(Conringieae)、紫堇科(isatidae)和斜花科(Plagiolobeae) 12个属的花粉形态进行了研究。结果表明,极径、花粉外壁纹饰、中果皮宽度和外壁厚度具有重要的系统意义。花粉粒呈三轴形,形状从长形到过长形不等,极轴长度为30.28 ~ 41.05µm,赤道轴长度为17.21 ~ 23.36µm。然而,细微的细节可以用来区分属内不同物种的花粉粒。外壁纹饰在部落内属间和同一属内种间均有差异。根据管腔大小可以区分出三种花粉类型。各种群花粉具有网状、微网状(Conringia orientalis, Plagioloba derakii)或大网状(Moricandia sinaica)的异质性。外壁厚度范围为0.75 ~ 2.60µm。花粉特征支持:(1)在所有4个部落中存在2种明显的花粉类型(即Conringia austria和Iljinskaea planisiliqua类型);(ii)苔科与芸苔科花粉形态的相似性;(3) crenulata从Zuvanda转移到Plagioloba, planisiliqua从Conringia转移到iljinskae。斜刀藻花粉形态特征差异较大,有待进一步研究。并给出了该属的种键。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Pollen Morphology of Some Selected Species of the Tribes Brassiceae, Conringieae, Isatideae, and Plagiolobeae (Brassicaceae) in Iran, and Its Taxonomic Significance
ABSTRACT Pollen morphology of 12 species, representing genera of the tribes Brassiceae, Conringieae, Isatideae and Plagiolobeae were studied using light microscopy (LM) and scanning electron microscopy (SEM). The results demonstrated that the polar diameter, pollen exine ornamentation, mesocolpium width, and exine thickness have important systematic significance. Pollen grains in these genera were tricolpate and their shapes varied from prolate to perprolate, with the polar axis length ranging from 30.28 to 41.05 µm and the equatorial axis length ranging from 17.21 to 23.36 µm. However, fine details can be used to distinguish pollen grains of the different species within the genera. The exine ornamentation varied among genera within the tribes and among species within the same genus. Three pollen types are distinguished based on lumen size. All the studied tribes' pollen were heterogeneous, with reticulate, microreticulate (Conringia orientalis, Plagioloba derakii), or macroreticulate (Moricandia sinaica) ornamentation. The exine thickness ranged from 0.75 to 2.60 µm. Pollen characteristics support: (i) two distinct pollen types (viz. Conringia austriaca and Iljinskaea planisiliqua types) in all four tribes; (ii) the similarity of the pollen shape between tribes Isatideae and Brassiceae; (iii) the transfer of P. crenulata from Zuvanda to Plagioloba, and of I. planisiliqua from Conringia to Iljinskaea. Plagioloba clavata displays great variation in pollen morphological characters and needs to be further studied. A key to the species of the genera was also provided.
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来源期刊
Palynology
Palynology 地学-古生物学
CiteScore
3.40
自引率
26.70%
发文量
48
审稿时长
>12 weeks
期刊介绍: Palynology is an international journal, and covers all aspects of the science. We accept papers on both pre-Quaternary and Quaternary palynology and palaeobotany. Contributions on novel uses of palynology, review articles, book reviews, taxonomic studies and papers on methodology are all actively encouraged.
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