干旱区生态环境知识资源中心(Arid): Pollen morphological variability correlates with a large-scale gradient of aridity

Arid

DOI	10.5194/we-20-19-2020
	Pollen morphological variability correlates with a large-scale gradient of aridity
	Fatmi, Hindel 1; Maalem, Souhail 1; Harsa, Bouchra 1,2,3; Dekak, Ahmed 1; Chenchouni, Haroun 1,4
通讯作者	Chenchouni, Haroun
来源期刊	WEB ECOLOGY
ISSN	2193-3081
EISSN	1399-1183
出版年	2020
卷号	20 期号:1 页码:19-32
英文摘要	The study of the morphology of living organisms is essential to understand their evolution and diversity. This study aims to determine the importance of climatic gradients in the diversity of pollen morphotypes using Atriplex halimus L. (Amaranthaceae) as a model species. Atriplex halimus is a perennial shrubby plant, polymorphic and very resistant to severe environmental conditions. In seven bioclimatic zones, ranging from mesic conditions in the north to hot-hyperarid in the south, pollen samples were collected from 49 sites, with seven accessions per bioclimate. Under a light microscope, pollen grains were selected and analyzed from three anthers of different flowers. Besides the usual pollen grain types, some previously unknown morphotypes, such as sulcate, triangular, and ovoid, were observed and described at the different climatic zones. A total of 10 pollen grain shapes were quantified and discussed following their specific occurrences within different climatic zones. Occurrence frequencies of different pollen shapes ranged between 0% and 85.7 %, where the pantoporate spheroidal was the most widespread in all climatic zones, especially in the desert climate (85.7 %). Five pollen types occurred exclusively once per climate zone. The pantoporate prolate spheroidal in mesomediterranean climate with a long dry season (28.6 %), sulcate in the xerothermomediterranean climate (14.3%), pantoporate subtriangular in the subdesert climate with a short dry season (14.3 %), and pantoporate subprolate and boat-shaped in a subdesert climate with a long dry season with 14.3% for each. Our findings help to understand the evolutionary effects of climate gradients on pollen morphology and variability in arid and desert areas and point towards a high degree of specialization in order to maximize trade-offs between pollination efficiency and protection of pollen grains from dehydration.
类型	Article
语种	英语
国家	Algeria
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000535177300001
WOS关键词	ATRIPLEX-HALIMUS L. ; CUCURBITA-PEPO ; EVOLUTION ; DIVERSITY ; SIZE ; POLYMORPHISM ; PERFORMANCE ; ANGIOSPERMS ; ALLOCATION ; SELECTION
WOS类目	Ecology ; Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/318634
作者单位	1.Univ Larbi Tebessi Tebessa, Fac Exact Sci & Nat & Life Sci, Dept Nat & Life Sci, Tebessa 12002, Algeria; 2.Univ Badji Mokhtar Annaba, Dept Biol, Annaba 23000, Algeria; 3.Univ Badji Mokhtar Annaba, Fac Sci, Lab Plant Biol & Environm LBVE, Axis Med Plants & Nat Subst, Annaba 23000, Algeria; 4.Univ Larbi Ben Mhidi, Lab Nat Resources & Management Sensit Environm RN, Oum El Bouaghi 04000, Algeria
推荐引用方式 GB/T 7714	Fatmi, Hindel,Maalem, Souhail,Harsa, Bouchra,et al. Pollen morphological variability correlates with a large-scale gradient of aridity[J],2020,20(1):19-32.
APA	Fatmi, Hindel,Maalem, Souhail,Harsa, Bouchra,Dekak, Ahmed,&Chenchouni, Haroun.(2020).Pollen morphological variability correlates with a large-scale gradient of aridity.WEB ECOLOGY,20(1),19-32.
MLA	Fatmi, Hindel,et al."Pollen morphological variability correlates with a large-scale gradient of aridity".WEB ECOLOGY 20.1(2020):19-32.