干旱区生态环境知识资源中心(Arid): Pollen morphology of the Ephedra (Ephedraceae) species distributed in Mexico

Arid

DOI	10.21829/abm130.2023.2244
	Pollen morphology of the Ephedra (Ephedraceae) species distributed in Mexico
	Escobedo, Iris Grisel Galvan; Mata, Lauro Lopez; Rodriguez, Armando Zepeda; Najera, Francisco Pasos; Perez, Irma Rosas
通讯作者	Escobedo, IGG
来源期刊	ACTA BOTANICA MEXICANA
EISSN	2448-7589
出版年	2023
卷号	130
英文摘要	Background and Aims: The Ephedra genus contains nearly 50 species distributed in semi-arid regions of the world. Mexico contains eight of these species: Ephedra anti-syphilitica, E. aspera, E. californica, E. compacta, E. nevadensis, E. pedunculata, E. torreyana and E. trifurca. The botanical affinities of Ephedripites fossil pollen are difficult to assign due to lack of detailed data on pollen morphology of extant Ephedra species distributed in Mexico. The objective of this work was to characterize the pollen morphology of the eight Ephedra species distributed in Mexico as well as to detect the distinctive morphological variables of each species.Methods: Pollen grains were taken from herbarium specimens and processed with the acetolysis technique. Eight morphological variables were reviewed with both pho-tonic microscopy and scanning electron microscopy. All variables were analyzed with univariate and multivariate statistical techniques.Key results: The variables of morphological importance were number of plicae and distance among plicae, and plica form and pseudosulcus form. Of these, the distance among plicae is not a variable commonly considered relevant in studies of pollen morphology of Ephedra. The pseudosulcus form accounted for the most pollen variation provided it is linked to presence or absence of pseudosulcus ramifications. Ephedra species were grouped into four classes: I) E. aspera, E. compacta and E. pedunculata; II) E. californica and E. trifurca; III) E. antisyphilitica and E. torreyana; and IV) E. nevadensis.Conclusions: Multivariate statistical methods allowed us to jointly analyze qualitative and quantitative characters of the pollen of the Ephedra species from Mexico and group them into classes based on their pollen morphology. This serves as a reference to assign botanical affinities with current species that have typical Ephedroid pollen recorded in some paleobasins of Mexico.
英文关键词	Ephedrales fossil pollen Gnetidae plicae pseudosulcus
类型	Article
语种	英语
开放获取类型	Green Submitted, gold
收录类别	SCI-E
WOS记录号	WOS:001127053100001
WOS关键词	PHYLOGENETIC-RELATIONSHIPS ; AERODYNAMICS ; CHLOROPLAST ; SEQUENCE ; GNETALES ; NUCLEAR ; GRAINS
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/394946
推荐引用方式 GB/T 7714	Escobedo, Iris Grisel Galvan,Mata, Lauro Lopez,Rodriguez, Armando Zepeda,et al. Pollen morphology of the Ephedra (Ephedraceae) species distributed in Mexico[J],2023,130.
APA	Escobedo, Iris Grisel Galvan,Mata, Lauro Lopez,Rodriguez, Armando Zepeda,Najera, Francisco Pasos,&Perez, Irma Rosas.(2023).Pollen morphology of the Ephedra (Ephedraceae) species distributed in Mexico.ACTA BOTANICA MEXICANA,130.
MLA	Escobedo, Iris Grisel Galvan,et al."Pollen morphology of the Ephedra (Ephedraceae) species distributed in Mexico".ACTA BOTANICA MEXICANA 130(2023).