干旱区生态环境知识资源中心(Arid): High Air Humidity Causes Atmospheric Water Absorption via Assimilating Branches in the Deep-Rooted Tree Haloxylon ammodendron in an Arid Desert Region of Northwest China

Arid

DOI	10.3389/fpls.2019.00573
	High Air Humidity Causes Atmospheric Water Absorption via Assimilating Branches in the Deep-Rooted Tree Haloxylon ammodendron in an Arid Desert Region of Northwest China
	Gong, Xue-Wei 1,2; Lu, Guang-Hui 1,2,3; He, Xue-Min 1,2,3; Sarkar, Binoy 4,5; Yang, Xiao-Dong 1,2
通讯作者	Lu, Guang-Hui ; Yang, Xiao-Dong
来源期刊	FRONTIERS IN PLANT SCIENCE
ISSN	1664-462X
出版年	2019
卷号	10
英文摘要	Atmospheric water is one of the main water resources for plants in arid ecosystems. However, whether deep-rooted, tomentum-less desert trees can absorb atmospheric water via aerial organs and transport the water into their bodies remains poorly understood. In the present study, a woody, deep-rooted, tomentum-less plant, Haloxylon ammodendron (C.A. Mey.) Bunge, was selected as the experimental object to investigate the preconditions for and consequences of foliar water uptake. Plant water status, gas exchange, and O-18 isotopic signatures of the plant were investigated following a typical rainfall pulse and a high-humidity exposure experiment. The results showed that a high content of atmospheric water was the prerequisite for foliar water uptake by H. ammodendron in the arid desert region. After atmospheric water was absorbed via the assimilating branches, which perform the function of leaves due to leaf degeneration, the plant transported the water to the secondary branches and trunk stems, but not to the taproot xylem or the soil, based on the O-18 isotopic signatures of the specimen. Foliar water uptake altered the plant water status and gas exchange-related traits, i.e., water potential, stomatal conductance, transpiration rate, and instantaneous water use efficiency. Our results suggest that atmospheric water might be a subsidiary water resource for sustaining the survival and growth of deep-rooted plants in arid desert regions. These findings contribute to the knowledge of plant water physiology and restoration of desert plants in the arid regions of the planet.
英文关键词	foliar water uptake rainfall pulse deep-rooted woody plant air relative humidity O-18 isotopic signatures
类型	Article
语种	英语
国家	Peoples R China ; England ; Australia
开放获取类型	Green Accepted, Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000467284600001
WOS关键词	FOLIAR UPTAKE ; SUCCESSIVE CAMBIA ; SEED-GERMINATION ; TALL TREES ; PLANT ; DROUGHT ; DEW ; FOG ; FOREST ; LEAF
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
来源机构	新疆大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215827
作者单位	1.Xinjiang Univ, Key Lab Oasis Ecol, Urumqi, Peoples R China; 2.Xinjiang Univ, Coll Resources & Environm Sci, Urumqi, Peoples R China; 3.Xinjiang Univ, Inst Arid Ecol & Environm, Urumqi, Peoples R China; 4.Univ Sheffield, Dept Anim & Plant Sci, Sheffield, S Yorkshire, England; 5.Univ South Australia, Future Ind Inst, Mawson Lakes, SA, Australia
推荐引用方式 GB/T 7714	Gong, Xue-Wei,Lu, Guang-Hui,He, Xue-Min,et al. High Air Humidity Causes Atmospheric Water Absorption via Assimilating Branches in the Deep-Rooted Tree Haloxylon ammodendron in an Arid Desert Region of Northwest China[J]. 新疆大学,2019,10.
APA	Gong, Xue-Wei,Lu, Guang-Hui,He, Xue-Min,Sarkar, Binoy,&Yang, Xiao-Dong.(2019).High Air Humidity Causes Atmospheric Water Absorption via Assimilating Branches in the Deep-Rooted Tree Haloxylon ammodendron in an Arid Desert Region of Northwest China.FRONTIERS IN PLANT SCIENCE,10.
MLA	Gong, Xue-Wei,et al."High Air Humidity Causes Atmospheric Water Absorption via Assimilating Branches in the Deep-Rooted Tree Haloxylon ammodendron in an Arid Desert Region of Northwest China".FRONTIERS IN PLANT SCIENCE 10(2019).