伊拉克北部金丝桃科特有种花粉形态的多样性

IF 1.6 Q3 PLANT SCIENCES Sabrao Journal of Breeding and Genetics Pub Date : 2023-10-31 DOI:10.54910/sabrao2023.55.5.12
AK ALANBARI, MA AL-HADEETHI, SS AL-SHAMI, NT SALMAN
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引用次数: 0

摘要

本文对伊拉克特有的金丝桃属植物的花粉形态进行了研究。研究揭示了极地和赤道视角花粉粒的表型特征及其定量和定性特征。结果表明:金丝桃属的花粉粒呈径向对称、等极性分布,除金丝桃属的花粉粒为四果酸花粉粒外,其余属的花粉粒均为简单的三孔花粉粒;根据花粉颗粒大小将所研究的物种分为两组。在赤道观上,小花粉粒的平均长度在10 ~ 16 μm之间。花粉粒大小中等,平均大小在17 ~ 26 μm之间,分别为:H. retusum、H. triquetrifolium、H. perforatum、H. lydium、H. tetrapterum、H. asperulium、H. scabrum和H. davisii。同样按市盈率划分,花粉粒主要分为两组。花粉粒呈近长圆形,扫描电镜观察花粉粒的外壁雕刻,可分为4个类群:1)微网状网状,包括asperulium、lydium和vermiculare; 2)穿孔,包括H. retusum、H. scabrum、H. tetrapterum和H. triquetrifolium; 3)穿孔,H. perforatum和H. davisii, 4)和lysimachioides的网状外壁雕刻。扫描电镜显示,外皮厚度在0.5 ~ 2 μm之间。该专题研究还增加了一种以前在伊拉克没有记录的新物种H. davisii。这项花粉研究为分类提供了有价值的数据,并建议在伊拉克进行首次登记。相关研究可为伊拉克金丝桃属植物分类提供线索。
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PALYNOLOGICAL DIVERSITY OF POLLEN MORPHOLOGY IN ENDEMIC NORTHERN IRAQI HYPERICUM SPECIES (HYPERICACEAE)
The presented research investigated the pollen morphology of endemic Iraqi Hypericum species. The study revealed phenotypic features of pollen grains in the polar and equatorial views and their quantitative and qualitative characteristics. The results showed that the pollen grains of the genus Hypericum were radially symmetrical and isopolar, and their apertures were simple and tricolporate, except the species H. davisii, distinguished as tetracolprate. Dividing the studied species based on pollen grain sizes comprised two groups. Small pollen grains with an average length of the equatorial view ranged between 10–16 μm in H. lysimachioides and H. vermiculare. Medium-sized pollen grains with an average extent between 17–26 μm emerged in the species, i.e., H. retusum, H. triquetrifolium, H. perforatum, H. lydium, H. tetrapterum, H. asperulium, H. scabrum, and H. davisii. Pollen grains, also divided according to the P/E ratio, had two main groups. The pollen grains were subprolate and spherical, with the exine sculpturing examined by a scanning electron microscope (SEM), and isolated into four groups: 1) microreticulate reticulum, including H. asperulium, H. lydium, and H. vermiculare, 2) perforate, i.e., H. retusum, H. scabrum, H. tetrapterum, and H. triquetrifolium, 3) psilate with H. perforatum and H. davisii, 4) and reticulate exine sculpturing in H. lysimachioides, all isolated from the rest of the species. SEM images showed the thickness of exine ranged from 0.5 to 2 μm. The topical study also added H. davisii as a new species with no previous records in Iraq. This pollen study added valuable data for taxonomy and suggested that it should proceed with its first-time registration in Iraq. The pertinent research could provide a taxonomical key for Hypericum species in Iraq.
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来源期刊
Sabrao Journal of Breeding and Genetics
Sabrao Journal of Breeding and Genetics 农林科学-奶制品与动物科学
CiteScore
1.90
自引率
50.00%
发文量
63
期刊介绍: The SABRAO Journal of Breeding and Genetics is an international journal of plant breeding and genetics research and was first published in 1969. It is the official publication of the Society for the Advancement of Breeding Research in Asia and Oceania (SABRAO). Its objectives are to: promote the international exchange of research information on plant breeding and genetics, by describing new research findings, or ideas of a basic or practical nature; and be a medium for the exchange of ideas and news regarding members of the Society. The Journal gives priority to articles that are of direct relevance to plant breeders and with emphasis on the Asian region. Invited for publication are research articles, short communications, methods, reviews, commentaries, and opinion articles. Scientific contributions are refereed and edited to international standards. The journal publishes articles for SABRAO members mainly. The Journal preferred strongly that at least one author should be a current member of the Society. Non-members may also publish in the journal.
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