干旱区生态环境知识资源中心(Arid): Is Pteropyrum a pathway to C-4 evolution in Polygonaceae? An integrative approach to the taxonomy and anatomy of Pteropyrum (C-3), an immediate relative of Calligonum (C-4)

Arid

DOI	10.1093/botlinnean/boz079
	Is Pteropyrum a pathway to C-4 evolution in Polygonaceae? An integrative approach to the taxonomy and anatomy of Pteropyrum (C-3), an immediate relative of Calligonum (C-4)
	Doostmohammadi, Moslem; Malekmohammadi, Maryam; Djamali, Morteza; Akhani, Hossein
通讯作者	Akhani, H
来源期刊	BOTANICAL JOURNAL OF THE LINNEAN SOCIETY
ISSN	0024-4074
EISSN	1095-8339
出版年	2020
卷号	192 期号:2 页码:369-400
英文摘要	Pteropyrum is a small genus of Polygonaceae with four species from the arid regions of Iran and adjacent countries. Pteropyrum spp. are not precisely delimitated and are difficult to identify because of their high plasticity in morphological characters. Pteropyrum (C-3) has a close affinity to Calligonum (C-4) and is therefore a suitable case for C-4 evolutionary studies. We investigated the morphology and micromorphology (including pollen morphology) of Pteropyrum and elucidated the phylogenetic relationships with Atraphaxis and Calligonum using nuclear ITS sequences. Characteristics of the photosynthetic tissues such as volume and number of layers of primary carbon assimilation tissues (PCA) and photosynthetic carbon reduction tissue (PCR) were studied. In addition, the leaf and cotyledon anatomical characters of Pteropyrum (C-3), Atraphaxis (C-3) and Calligonum (C-4), and their delta C-13 values were compared to look for evolutionary changes in assimilating organs. The molecular phylogenetic tree identifies two strongly supported clades in Pteropyrum and its close relationship with Calligonum, confirming previous studies. Some morphologically similar species belong to different clades, which is probably due to convergent evolution and homoplasy. Leaf anatomical studies show that Atraphaxis has a multilayered mesophyll tissue, whereas Calligonum has one-layered mesophyll cells. The volume and layer number of mesophyll tissue cells decreases, whereas water storage tissue area significantly increases from Atraphaxis to Pteropyrum and Calligonum. This phenomenon confirms previous studies in other lineages with C-4 salsoloid anatomy that have evolved through increasing of water storage tissue and succulence of assimilating organs. In the taxonomic part of the paper, a key to identification of accepted taxa of Pteropyrum, description of species and distribution maps are presented based on numerous herbarium specimens and our own rich collections from the field. Four new species are described based on a combination of morphology of seedlings and mature plants, pollen morphology and molecular data. A subspecific classification is suggested to show morpho-geographical variation of Pteropyrum aucheri s.l.
英文关键词	Atraphaxis C-4 photosynthesis Caryophyllales cryptic speciation desert flora Irano-Turanian flora molecular phylogeny pollen morphology proto-Kranz anatomy
类型	Article
语种	英语
开放获取类型	Green Published
收录类别	SCI-E
WOS记录号	WOS:000565905800004
WOS关键词	POLYGONOIDEAE POLYGONACEAE ; GENERA POLYGONACEAE ; KRANZ ANATOMY ; PHOTOSYNTHESIS ; CHENOPODIACEAE ; PHYLOGENY ; POLLEN ; PLANTS ; DIVERSITY ; ULTRASTRUCTURE
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
来源机构	French National Research Institute for Sustainable Development
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326034
作者单位	[Doostmohammadi, Moslem; Malekmohammadi, Maryam; Akhani, Hossein] Univ Tehran, Coll Sci, Sch Biol, Halophytes & C4 Plants Res Lab,Dept Plant Sci, POB 14155-6455, Tehran, Iran; [Djamali, Morteza] Avignon Univ, Aix Marseille Univ, Inst Mediterranden Biodiversite & Ecol IMBE, UMR7263,CNRS,IRD,IMBE, Technopole Arbois Mediterranee,Bat Villemin,BP 80, F-13545 Aix En Provence 04, France
推荐引用方式 GB/T 7714	Doostmohammadi, Moslem,Malekmohammadi, Maryam,Djamali, Morteza,et al. Is Pteropyrum a pathway to C-4 evolution in Polygonaceae? An integrative approach to the taxonomy and anatomy of Pteropyrum (C-3), an immediate relative of Calligonum (C-4)[J]. French National Research Institute for Sustainable Development,2020,192(2):369-400.
APA	Doostmohammadi, Moslem,Malekmohammadi, Maryam,Djamali, Morteza,&Akhani, Hossein.(2020).Is Pteropyrum a pathway to C-4 evolution in Polygonaceae? An integrative approach to the taxonomy and anatomy of Pteropyrum (C-3), an immediate relative of Calligonum (C-4).BOTANICAL JOURNAL OF THE LINNEAN SOCIETY,192(2),369-400.
MLA	Doostmohammadi, Moslem,et al."Is Pteropyrum a pathway to C-4 evolution in Polygonaceae? An integrative approach to the taxonomy and anatomy of Pteropyrum (C-3), an immediate relative of Calligonum (C-4)".BOTANICAL JOURNAL OF THE LINNEAN SOCIETY 192.2(2020):369-400.