Arid
DOI10.3389/fpls.2018.01678
Sodium-Related Adaptations to Drought: New Insights From the Xerophyte Plant Zygophyllum xanthoxylum
Xi, Jie-Jun1; Chen, Hong-Yu1; Bai, Wan-Peng1; Yang, Rong-Chen1; Yang, Pei-Zhi1; Chen, Ru-Jin2; Hu, Tian-Ming1; Wang, Suo-Min3
通讯作者Hu, Tian-Ming ; Wang, Suo-Min
来源期刊FRONTIERS IN PLANT SCIENCE
ISSN1664-462X
出版年2018
卷号9
英文摘要

Understanding the unusual physiological mechanisms that enable drought tolerance in xerophytes will be of considerable benefit because of the potential to identify novel and key genetic elements for future crop improvements. These plants are interesting because they are well-adapted for life in arid zones; Zygophyllum xanthoxylum, for example, is a typical xerophytic shrub that inhabits central Asian deserts, accumulating substantial levels of sodium (Na+) in its succulent leaves while growing in soils that contain very low levels of this ion. The physiological importance of this unusual trait to drought adaptations remains poorly understood, however. Thus, 2-week-old Z. xanthoxylum plants were treated with 50 mM NaCl (Na) for 7 days in this study in order to investigate their drought tolerance, leaf osmotic potential (Psi(s)) related parameters, anatomical characteristics, and transpiration traits. The results demonstrated that NaCl treatment significantly enhanced both the survivability and durability of Z. xanthoxylum plants under extreme drought conditions. The bulk of the Na+ ions encapsulated in plants was overwhelmingly allocated to leaves rather than roots or stems under drought conditions; thus, compared to the control, significantly more Na+ compared to other solutes such as K+, Ca2+, Cl-, sugars, and proline accumulated in the leaves of NaCI-treated plants and led to a marked decrease (31%) in leaf Psi(s). In addition, the accumulation of Na+ ions also resulted in mesophyll cell enlargement and leaf succulence, enabling the additional storage of water; Na+ ions also reduced the rate of water loss by decreasing stomatal density and down-regulating stomatal aperture size. The results of this study demonstrate that Z. xanthoxylum has evolved a notable ability to utilize Na+ ions to lower Psi(s), swell its leaves, and decrease stomatal aperture sizes, in order to enable the additional uptake and storage of water and mitigate losses. These distinctive drought adaption characteristics mean that the xerophytic plant Z. xanthoxylum presents a fascinating case study for the potential identification of important and novel genetic elements that could improve crops. This report provides insights on the eco-physiological role of sodium accumulation in xerophytes adapted to extremely arid habitats.


英文关键词drought leaf succulence sodium xerophyte Zygophyllum xanthoxylum
类型Article
语种英语
国家Peoples R China ; USA
收录类别SCI-E
WOS记录号WOS:000450656600002
WOS关键词HALOPHYTE SUAEDA-MARITIMA ; STOMATAL GUARD-CELLS ; ASTER-TRIPOLIUM ; WATER RELATIONS ; SALT TOLERANCE ; SUPEROXIDE-DISMUTASE ; OSMOTIC ADJUSTMENT ; HYDROGEN-PEROXIDE ; FREE PROLINE ; DRYING SOIL
WOS类目Plant Sciences
WOS研究方向Plant Sciences
来源机构兰州大学 ; 西北农林科技大学
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/209483
作者单位1.Northwest A&F Univ, Coll Grassland Agr, Xianyang, Peoples R China;
2.Noble Res Inst, Ardmore, OK USA;
3.Lanzhou Univ, Coll Pastoral Agr Sci & Technol, State Key Lab Grassland Agroecosyst, Lanzhou, Gansu, Peoples R China
推荐引用方式
GB/T 7714
Xi, Jie-Jun,Chen, Hong-Yu,Bai, Wan-Peng,et al. Sodium-Related Adaptations to Drought: New Insights From the Xerophyte Plant Zygophyllum xanthoxylum[J]. 兰州大学, 西北农林科技大学,2018,9.
APA Xi, Jie-Jun.,Chen, Hong-Yu.,Bai, Wan-Peng.,Yang, Rong-Chen.,Yang, Pei-Zhi.,...&Wang, Suo-Min.(2018).Sodium-Related Adaptations to Drought: New Insights From the Xerophyte Plant Zygophyllum xanthoxylum.FRONTIERS IN PLANT SCIENCE,9.
MLA Xi, Jie-Jun,et al."Sodium-Related Adaptations to Drought: New Insights From the Xerophyte Plant Zygophyllum xanthoxylum".FRONTIERS IN PLANT SCIENCE 9(2018).
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