Cytology of SW Asian Chenopodiaceae: new data from Iran and a review of previous records and correlations with life forms and C4 photosynthesis
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- 作者：Seyed Mahmood Ghaffari ; Zhila Balaei ; Targol Chatrenoor…
- 关键词：Amaranthaceae ; Chenopodiaceae ; Cytology ; Desert ecosystems ; Iran–Turanian region ; Karyotype ; Polyploidy
- 刊名：Plant Systematics and Evolution
- 出版年：2015
- 出版时间：February 2015
- 年：2015
- 卷：301
- 期：2
- 页码：501-521
- 全文大小：781 KB
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Zhila Balaei (2)
Targol Chatrenoor (3)
Hossein Akhani (3)
1. Institute of Biochemistry and Biophysics, University of Tehran, PO Box 13145-1384, Tehran, Iran
2. East Azarbaijan, Agricultural and Natural Resources Research Center, Tabriz, Iran
3. Department of Plant Sciences, School of Biology and Center of Excellence in Phylogeny of Living Organisms, University of Tehran, P.O. Box 14155-6455, Tehran, Iran - 刊物类别：Biomedical and Life Sciences
- 刊物主题：Life Sciences
Plant Sciences
Plant Ecology
Plant Anatomy and Development
Plant Systematics/Taxonomy/ Biogeography - 出版者：Springer Wien
- ISSN：1615-6110
文摘
The mitotic chromosome numbers of 35 species belonging to 25 genera from East Azerbaijan Province of Iran and meiotic numbers of five species of Salicornia from different parts of Iran of family Chenopodiaceae are reported. Some of them are first reports and some are first counts from Iran. Based on a review of previously published reports, 145 species and 46 genera occurring in SW Asia have been cytologically studied either based on populations within or surrounding regions. The nomenclature and generic position of all these species are updated based on recent phylogenetic and taxonomic studies. The polyploidy percentage of 26.2?% is beyond the average known in flowering plants, which is surprising for dominant plants of saline and desert ecosystems. The polyploidy of annual plants is only 16?% and that of perennials 19?%, respectively. It was found that C4 plants represent lower polyploidy levels than C3 plants. This is correlated by the fact that large number of annuals in the area is C4 and secondly, polyploidy may constrain niche advantageous in C4 plants. However, presence of different cytotypes in the widespread species is advantageous as they can occupy different niches. The basic chromosome numbers in chenopods is x?=?9 with few derived exceptions in Spinacia (x?=?6), Camphorosma (x?=?6) and some species of Petrosimonia (x?=?8).