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Evaluating the resistance mechanism of Atriplex leucoclada (Orache) to salt and water stress; a potential crop for biosaline agriculture


Alam, H and Zamin, M and Adnan, M and Ahmad, N and Nawaz, T and Saud, S and Basir, A and Liu, K and Harrison, MT and Hassan, S and Alharby, HF and Alzahrani, YM and Alghamdi, SA and Majrashi, A and Alharbi, BM and Alabdallah, NM and Fahad, S, Evaluating the resistance mechanism of Atriplex leucoclada (Orache) to salt and water stress; a potential crop for biosaline agriculture, Frontiers in Plant Science, 13 Article 948736. ISSN 1664-462X (In Press) [Refereed Article]

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2022 Alam, Zamin, Adnan, Ahmad, Nawaz, Saud, Basir, Liu, Harrison, Hassan, Alharby, Alzahrani, Alghamdi, Majrashi, Alharbi, Alabdallah and Fahad. This is an open-access article distributed under the terms of the Creative Commons Attribution 4.0 International (CC BY 4.0) License ( The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

DOI: doi:10.3389/fpls.2022.948736


The development of food and forage crops that flourish under saline conditions may be a prospective avenue for mitigating the impacts of climate change, both allowing biomass production under conditions of water-deficit and potentially expanding land-use to hitherto non-arable zones. Here, we examine responses of the native halophytic shrub Atriplex leucoclada to salt and drought stress using a factorial design, with four levels of salinity and four drought intensities under the arid conditions. A. leucoclada plants exhibited morphological and physiological adaptation to salt and water stress which had little effect on survival or growth. Under low salinity stress, water stress decreased the root length of A. leucoclada; in contrast, under highly saline conditions root length increased. Plant tissue total nitrogen, phosphorus and potassium content decreased with increasing water stress under low salinity. As salt stress increased, detrimental effects of water deficit diminished. We found that both salt and water stress had increased Na+ and Cl- uptake, with both stresses having an additive and beneficial role in increasing ABA and proline content. We conclude that A. leucoclada accumulates high salt concentrations in its cellular vacuoles as a salinity resistance mechanism; this salt accumulation then becomes conducive to mitigation of water stress. Application of these mechanisms to other crops may improve tolerance and productivity under salt and water stress, potentially improving food security.

Item Details

Item Type:Refereed Article
Keywords:A. leucoclada, alternate crops, saline agriculture, salt stess, water stress
Research Division:Agricultural, Veterinary and Food Sciences
Research Group:Agriculture, land and farm management
Research Field:Sustainable agricultural development
Objective Division:Environmental Management
Objective Group:Fresh, ground and surface water systems and management
Objective Field:Rehabilitation or conservation of fresh, ground and surface water environments
UTAS Author:Liu, K (Mr Ke Liu)
UTAS Author:Harrison, MT (Associate Professor Matthew Harrison)
ID Code:150259
Year Published:In Press
Deposited By:TIA - Research Institute
Deposited On:2022-06-06
Last Modified:2022-08-12
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