Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.3389/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
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ISSN | 1664-462X |
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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