Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2018WR022656 |
Plant Growth-Promoting Rhizobacteria (PGPR) Reduce Evaporation and Increase Soil Water Retention | |
Zheng, Wenjuan1; Zeng, Saiqi1; Bais, Harsh1; LaManna, Jacob M.2; Hussey, Daniel S.2; Jacobson, David L.2; Jin, Yan1 | |
2018-05-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2018 |
卷号 | 54期号:5页码:3673-3687 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Enhancement of plant drought stress tolerance by plant growth-promoting rhizobacteria (PGPR) has been increasingly documented in the literature. However, most studies to date have focused on PGPR-root/plant interactions; very little is known about PGPR's role in mediating physiochemical and hydrological changes in the rhizospheric soil that may impact plant drought stress tolerance. Our study aimed to advance mechanistic understanding of PGPR-mediated biophysical changes in the rhizospheric soil that may contribute to plant drought stress tolerance in addition to plant responses. We measured soil water retention characteristics, hydraulic conductivity, and water evaporation in soils with various textures (i.e., pure sand, sandy soil, and clay) as influenced by a representative PGPR (Bacillus subtilis strain UD1022) using the HYPROP system. We found that all PGPR-treated soils held more water and had reduced hydraulic conductivity and accumulative evaporation, compared to their corresponding controls. We discuss three mechanisms, due to B. subtilis incubation or production of extracellular polymeric substances (EPS), that are potentially responsible for the changes in hydraulic properties and soil evaporation: (i) EPS have a large water holding capacity; (ii) EPS alter soil matrix structure and connectivity of pore space; (iii) EPS modify the physicochemical properties of water (surface tension and viscosity). These results clearly demonstrate PGPR's ability to increase water availability to plants by slowing down evaporation and by increasing the time available for plants to make metabolic adjustments to drought stress. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000442351300023 |
WOS关键词 | HYDRAULIC CONDUCTIVITY ; POROUS-MEDIA ; PHYSICAL-PROPERTIES ; DROUGHT TOLERANCE ; BIOFILM ; BACILLUS ; FLOW ; RESISTANCE ; MUCILAGE ; STRESS |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/21039 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Delaware, Dept Plant & Soil Sci, Newark, DE 19717 USA; 2.NIST, Gaithersburg, MD 20899 USA |
推荐引用方式 GB/T 7714 | Zheng, Wenjuan,Zeng, Saiqi,Bais, Harsh,et al. Plant Growth-Promoting Rhizobacteria (PGPR) Reduce Evaporation and Increase Soil Water Retention[J]. WATER RESOURCES RESEARCH,2018,54(5):3673-3687. |
APA | Zheng, Wenjuan.,Zeng, Saiqi.,Bais, Harsh.,LaManna, Jacob M..,Hussey, Daniel S..,...&Jin, Yan.(2018).Plant Growth-Promoting Rhizobacteria (PGPR) Reduce Evaporation and Increase Soil Water Retention.WATER RESOURCES RESEARCH,54(5),3673-3687. |
MLA | Zheng, Wenjuan,et al."Plant Growth-Promoting Rhizobacteria (PGPR) Reduce Evaporation and Increase Soil Water Retention".WATER RESOURCES RESEARCH 54.5(2018):3673-3687. |
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