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Authors Hussain, MI; El-Keblawy, A; Tsombou, FM
Author Full Name Hussain, M. Iftikhar; El-Keblawy, Ali; Mitterand Tsombou, Francois
Title Leaf Age, Canopy Position, and Habitat Affect the Carbon Isotope Discrimination and Water-Use Efficiency in Three C-3 Leguminous Prosopis Species from a Hyper-Arid Climate
Source PLANTS-BASEL
Language English
Document Type Article
Author Keywords carbon isotope composition; leaf C; leaf N; intrinsic water-use efficiency; canopy position; leaf age
Keywords Plus RESPIRED CO2; GRASSLAND; STRESS; GROWTH
Abstract The present study involved measurements of the stable carbon isotope composition (delta C-13) and intrinsic water-use efficiency (iWUE) of three C-3 leguminous Prosopis spp. (P. juliflora, P. cineraria, and P. pallida) foliage at different canopy positions (east and west) from saline (SLH) and non-saline habitats (NSH). Integrated measurements of the stable carbon isotope composition (delta C-13) of plant tissue were broadly used to study iWUE, taking into consideration the effect of leaf age and canopy position on C isotope discrimination. Mature foliage of P. pallida from an SLH with a west canopy position had significantly higher delta C-13 (less negative) than that from NSH. On the west side, Delta C-13 values ranged from 17.8 parts per thousand (P. pallida) to 22.31 parts per thousand (P. juliflora) for a west canopy position, while they varied from 18.05 parts per thousand (P. pallida) to 22.4 parts per thousand (P. cineraria) on the east canopy side. Because the patterns are similar for the three Prosopis species, the difference in carbon isotope discrimination (Delta C-13) between the canopy position (west and east) is relatively consistent among species and sites, ranging between 17.8 +/- 4.43 parts per thousand for the young foliage in the west and 18.05 +/- 4.35 parts per thousand for the east canopy position. The iWUE of P. pallida was twice that of P. cineraria. The iWUE of P. juliflora was higher from NSH than SLH. Mature leaves possessed a higher iWUE than the young leaves. We concluded that exotic P. juliflora and P. pallida have higher iWUE values than the native P. cineraria, which might be due to the rapid below-ground development of plant roots in the Arabian deserts of the United Arab Emirates (UAE). This could enable the alien species access to deeper humid soil layers or water resources.
Author Address [Hussain, M. Iftikhar; El-Keblawy, Ali] Univ Sharjah, RISE, Sharjah 27272, U Arab Emirates; [El-Keblawy, Ali; Mitterand Tsombou, Francois] Univ Sharjah, Fac Sci, Dept Appl Biol, Sharjah 27272, U Arab Emirates; [Mitterand Tsombou, Francois] Univ Malaga, Dept Biol Vegetal, Malaga 29016, Spain
Reprint Address Hussain, MI (corresponding author), Univ Sharjah, RISE, Sharjah 27272, U Arab Emirates.
E-mail Address mih786@gmail.com; akeblawy@sharjah.ac.ae; fmitternanatsombou@sharjah.ac.ae
ResearcherID Number ; Hussain, M. Iftikhar/Y-3575-2018
ORCID Number El-Keblawy, Ali/0000-0003-4448-6236; Hussain, M. Iftikhar/0000-0002-9710-3801
Funding Agency and Grant Number Sharjah Research Academy and Research Office of the University of Sharjah [150428]
Funding Text This study was supported by a research project (ID: 150428) funded by both the Sharjah Research Academy and Research Office of the University of Sharjah.
Times Cited 4
Total Times Cited Count (WoS, BCI, and CSCD) 4
Publisher MDPI
Publisher City BASEL
Publisher Address ST ALBAN-ANLAGE 66, CH-4052 BASEL, SWITZERLAND
29-Character Source Abbreviation PLANTS-BASEL
ISO Source Abbreviation Plants-Basel
Publication Date OCT
Year Published 2019
Volume 8
Issue 10
Article Number 402
Digital Object Identifier (DOI) 10.3390/plants8100402
Page Count 11
Web of Science Category Plant Sciences
Subject Category Plant Sciences
Document Delivery Number JP4XQ
Unique Article Identifier WOS:000498270000048
Plants associated with this reference

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