干旱区生态环境知识资源中心(Arid): Anatomy and dendrochronological potential of Moringa peregrina from the hyper-arid desert in Egypt

Arid

DOI	10.1016/j.dendro.2019.125606
	Anatomy and dendrochronological potential of Moringa peregrina from the hyper-arid desert in Egypt
	Farahat, Emad 1; Gaertner, Holger 2
通讯作者	Farahat, Emad
来源期刊	DENDROCHRONOLOGIA
ISSN	1125-7865
EISSN	1612-0051
出版年	2019
卷号	56
英文摘要	The annual growth and wood characteristics of tree species at southern Mediterranean countries, and its relationship with climate variables are recently two important topics for the researchers in this region. Although Moringa peregrina (Forssk.) Fiori is a key species in Africa due to its medicinal and economic values (e.g. as fuel, food and water purifier), little is known about its annual growth or its response to climate variables. In this study, we analyze its dendrochronological potential, macroscopic and microscopic wood structure, and correlation with climate. Wood discs were collected from two desert sites in Egypt Saint Catherine (SC) and Hurghada (HG). Wood discs and micro-slides were prepared, and the distinctness and pattern of rings, vessels, and ray structure were examined microscopically. The ring boundaries of M. peregrina were distinct and marked by thick-walled and flattened fibers. For the HG site, the resulting ring-width chronology spans 16 years, from 2001 to 2016. A significant positive relationship was found between tree growth at HG and precipitation prior to the vegetation period (January-March). April temperature of the year prior to growth had a significant positive relationship with M. peregrina growth. In contrast, April and May-August temperatures of the current growing season had a significant negative relationship with tree growth. We could not develop a chronology for M. peregrina at SC site due to the presence of growth anomalies in the collected wood discs from the site. Consequently, we did not get a clear picture on the climate- annual growth relationship for M. peregrina trees at this site. At SC, M. peregrina trees respond to stressful environmental conditions by adjusting their anatomical structure to produce a high number of small vessels. Moreover, there was spatial variability in the architecture of ray parenchyma that reflected the degree of stress in both sites. The results of this study improve our understanding of the growth-climate relationship in sub-tropical trees and the potential role of ray parenchyma in stressed environments.
英文关键词	Moringa peregrina Drought Tree-rings Ray parenchyma Xylem vessels Dendrochronology
类型	Article
语种	英语
国家	Egypt ; Switzerland
收录类别	SCI-E
WOS记录号	WOS:000476626800011
WOS关键词	HYDRAULIC ARCHITECTURE ; TROPICAL FOREST ; WOOD ANATOMY ; TREE-RINGS ; CLIMATE ; GROWTH ; VARIABILITY ; RESPONSES ; PRECIPITATION ; TEMPERATURE
WOS类目	Forestry ; Geography, Physical
WOS研究方向	Forestry ; Physical Geography
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215029
作者单位	1.Helwan Univ, Bot & Microbiol Dept, Fac Sci, PO 11790, Cairo, Egypt; 2.Swiss Fed Res Inst Forest Snow & Landscape Res WS, Zurcherstr 111, CH-8903 Birmensdorf, Switzerland
推荐引用方式 GB/T 7714	Farahat, Emad,Gaertner, Holger. Anatomy and dendrochronological potential of Moringa peregrina from the hyper-arid desert in Egypt[J],2019,56.
APA	Farahat, Emad,&Gaertner, Holger.(2019).Anatomy and dendrochronological potential of Moringa peregrina from the hyper-arid desert in Egypt.DENDROCHRONOLOGIA,56.
MLA	Farahat, Emad,et al."Anatomy and dendrochronological potential of Moringa peregrina from the hyper-arid desert in Egypt".DENDROCHRONOLOGIA 56(2019).