Hydraulic Conductivity Characteristics of Desert Plant Organs: Coping with Drought Tolerance Strategy
文献类型：期刊论文
| 作者 | Li, Shanjia1,2; Su, Peixi2; Zhang, Haina3,4; Zhou, Zijuan2; Shi, Rui2; Gou, Wei1 |
| 刊名 | WATER
 |
| 出版日期 | 2018-08-01 |
| 卷号 | 10期号:8页码:11 |
| ISSN号 | 2073-4441 |
| 关键词 | desert plant hydraulic conductivity high-pressure flowmeter plant functional traits drought tolerance |
| DOI | 10.3390/w10081036 |
| 通讯作者 | Li, Shanjia(lsjlut@163.com) |
| 英文摘要 | Plant hydraulic conductivity (K) refers to the rate of water flow (kg s(-1)) per unit pressure drop (MPa), which drives flow through the plant organ system. It is an important eco-physiology index for measuring plant water absorption and transport capacity. A field study was conducted in the arid region of the Heihe River Basin in northwestern China, plant hydraulic conductivity was measured by high-pressure flowmeter (HPFM) to investigate the characteristics of hydraulic conductivity of typical dominant desert plants (Reaumuria soongarica M., Nitraria sphaerocarpa M., and Sympegma regelii B.) and their relationship with functional traits of leaves, stems, and roots, and explaining their adaptation strategies to desert environment from the perspective of plant organs hydraulic conductivity. The results showed that the hydraulic conductivity of the leaves and stems of R. soongarica and N. sphaerocarpa (K-LA, leaf hydraulic conductivity per unit leaf area; K-LW, leaf hydraulic conductivity per unit leaf weight; K-SLA, stem hydraulic conductivity per unit leaf area; K-SLW, stem hydraulic conductivity per unit leaf weight) were significantly lower than those of S. regelii, while their fine root (K-RL, root hydraulic conductivity per unit leaf length; K-RSA, root hydraulic conductivity per unit root surface area) and whole root (K-TRW, whole root hydraulic conductivity per unit root weight) of hydraulic conductivity were significantly higher than those of S. regelii. In addition, K-LA and K-LW, K-SLA and K-SLW, and K-RL and K-RSA in three desert plants all exhibited consistent trends. Correlation analysis illustrated that the hydraulic conductivity of leaves and stems had a significantly positive correlation, but they had no significant negative correlation with the specific leaf weight (SLW, specific leaf weight). The hydraulic conductivity of fine root weight (K-RW, root hydraulic conductivity per unit root weight) and specific root surface area (SRSA, specific root surface area) showed significantly positive correlation (r = 0.727, P < 0.05). The results demonstrated that the R. soongarica and N. sphaerocarpa preserved their water content through the strong leaf absorption capacity of soil water and the low water dispersion rates of leaves to adapt to the harsher arid habitat, which is more drought tolerant than S. regelii. |
| 收录类别 | SCI |
| WOS关键词 | HIGH-PRESSURE FLOWMETER ; WATER TRANSPORT ; ROOT ; CONDUCTANCE ; FIELD ; PHOTOSYNTHESIS ; RESISTANCE ; TRAITS ; LEAF ; L. |
| WOS研究方向 | Water Resources |
| WOS类目 | Water Resources |
| 语种 | 英语 |
| 出版者 | MDPI |
| WOS记录号 | WOS:000448462700070 |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2558273 |
| 专题 | 寒区旱区环境与工程研究所 |
| 通讯作者 | Li, Shanjia |
| 作者单位 | 1.Lanzhou Univ Technol, Sch Life Sci & Engn, Lanzhou 730050, Gansu, Peoples R China 2.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Key Lab Land Surface Proc & Climate Change Cold &, Lanzhou 730000, Gansu, Peoples R China 3.Minist Water Resources Peoples Republ China, Res Ctr Water Resources & Ecol Environm Poyang La, Nanchang 330029, Jiangxi, Peoples R China 4.Nanchang Inst Technol, Sch Water Resources & Ecol Engn, Nanchang 330099, Jiangxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Shanjia,Su, Peixi,Zhang, Haina,et al. Hydraulic Conductivity Characteristics of Desert Plant Organs: Coping with Drought Tolerance Strategy[J]. WATER,2018,10(8):11. |
| APA | Li, Shanjia,Su, Peixi,Zhang, Haina,Zhou, Zijuan,Shi, Rui,&Gou, Wei.(2018).Hydraulic Conductivity Characteristics of Desert Plant Organs: Coping with Drought Tolerance Strategy.WATER,10(8),11. |
| MLA | Li, Shanjia,et al."Hydraulic Conductivity Characteristics of Desert Plant Organs: Coping with Drought Tolerance Strategy".WATER 10.8(2018):11. |
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来源：寒区旱区环境与工程研究所
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