干旱区生态环境知识资源中心(Arid): Effects of Water Availability on Leaf Trichome Density and Plant Growth and Development of Shepherdia xutahensis

Arid

DOI	10.3389/fpls.2022.855858
	Effects of Water Availability on Leaf Trichome Density and Plant Growth and Development of Shepherdia xutahensis
	Chen, Ji-Jhong; Sun, Youping; Kopp, Kelly; Oki, Lorence; Jones, Scott B.; Hipps, Lawrence
通讯作者	Chen, JJ ; Sun, YP
来源期刊	FRONTIERS IN PLANT SCIENCE
ISSN	1664-462X
出版年	2022
卷号	13
英文摘要	Many arid lands across the globe are experiencing more frequent and extreme droughts due to warmer temperatures resulting from climate change, less predictable precipitation patterns, and decreased soil moisture. Approximately 60-90% of household water is used for urban landscape irrigation in the western United States, necessitating the establishment of landscapes using drought-tolerant plants that conserve water. Shepherdia xutahensis (hybrid buffaloberry) is a drought-tolerant plant with dense leaf trichomes (epidermal appendages) that may limit excessive water loss by transpiration. However, little is known about how S. xutahensis regulates leaf heat balance when transpirational cooling is limited. The objective of this research was to investigate the effects of substrate water availability on plant growth and development and trichome density of S. xutahensis. Ninety-six clonally propagated plants were grown using an automated irrigation system, and their substrate volumetric water contents were controlled at 0.05-0.40 m(3)center dot m(-3) for 2 months. Results showed that water stress impaired plant growth and increased the proportion of visibly wilted leaves. Shepherdia xutahensis acclimates to drought by reducing cell dehydration and canopy overheating, which may be accomplished through decreased stomatal conductance, smaller leaf development, leaf curling, increased leaf thickness, and greater root-to-shoot ratio. Leaf trichome density increased when stem water potential decreased, resulting in greater leaf reflectance of visible light. Cell and leaf expansion were restricted under water stress, and negative correlations were exhibited between epidermal cell size and trichome density. According to our results, plasticity in leaves and roots aids plants in tolerating abiotic stresses associated with drought. Acclimation of S. xutahensis to water stress was associated with increased trichome density due to plasticity in cell size. Dense trichomes on leaves reflected more lights which appeared to facilitate leaf temperature regulation.
英文关键词	drought tolerance leaf reflectance pubescence xeric plant water potential
类型	Article
语种	英语
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000806141500001
WOS关键词	DROUGHT STRESS ; STOMATAL CONDUCTANCE ; VERBASCUM-THAPSUS ; ABSCISIC-ACID ; RESPONSES ; TEMPERATURE ; HAIRS ; PHOTOSYNTHESIS ; MORPHOLOGY ; ECOPHYSIOLOGY
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392832
推荐引用方式 GB/T 7714	Chen, Ji-Jhong,Sun, Youping,Kopp, Kelly,et al. Effects of Water Availability on Leaf Trichome Density and Plant Growth and Development of Shepherdia xutahensis[J],2022,13.
APA	Chen, Ji-Jhong,Sun, Youping,Kopp, Kelly,Oki, Lorence,Jones, Scott B.,&Hipps, Lawrence.(2022).Effects of Water Availability on Leaf Trichome Density and Plant Growth and Development of Shepherdia xutahensis.FRONTIERS IN PLANT SCIENCE,13.
MLA	Chen, Ji-Jhong,et al."Effects of Water Availability on Leaf Trichome Density and Plant Growth and Development of Shepherdia xutahensis".FRONTIERS IN PLANT SCIENCE 13(2022).