干旱区生态环境知识资源中心(Arid): Design of a unidirectional water valve in Tillandsia

Arid

DOI	10.1038/s41467-019-14236-5
	Design of a unidirectional water valve in Tillandsia
	Raux, Pascal S.; Gravelle, Simon; Dumais, Jacques
通讯作者	Dumais, Jacques
来源期刊	NATURE COMMUNICATIONS
ISSN	2041-1723
出版年	2020
卷号	11 期号:1
英文摘要	The bromeliad Tillandsia landbeckii thrives in the Atacama desert of Chile using the fog captured by specialized leaf trichomes to satisfy its water needs. However, it is still unclear how the trichome of T. landbeckii and other Tillandsia species is able to absorb fine water droplets during intermittent fog events while also preventing evaporation when the plant is exposed to the desert's hyperarid conditions. Here, we explain how a 5800-fold asymmetry in water conductance arises from a clever juxtaposition of a thick hygroscopic wall and a semipermeable membrane. While absorption is achieved by osmosis of liquid water, evaporation under dry external conditions shifts the liquid-gas interface forcing water to diffuse through the thick trichome wall in the vapor phase. We confirm this mechanism by fabricating artificial composite membranes mimicking the trichome structure. The reliance on intrinsic material properties instead of moving parts makes the trichome a promising basis for the development of microfluidics valves.
类型	Article
语种	英语
国家	Chile
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000512537400017
WOS关键词	RADIAL HYDRAULIC CONDUCTIVITY ; ROOTS ; BEHAVIOR ; DESERT
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315222
作者单位	Univ Adolfo Ibanez, Fac Ingn & Ciencias, Vina Del Mar, Chile
推荐引用方式 GB/T 7714	Raux, Pascal S.,Gravelle, Simon,Dumais, Jacques. Design of a unidirectional water valve in Tillandsia[J],2020,11(1).
APA	Raux, Pascal S.,Gravelle, Simon,&Dumais, Jacques.(2020).Design of a unidirectional water valve in Tillandsia.NATURE COMMUNICATIONS,11(1).
MLA	Raux, Pascal S.,et al."Design of a unidirectional water valve in Tillandsia".NATURE COMMUNICATIONS 11.1(2020).