干旱区生态环境知识资源中心(Arid): Disentangling evolutionary, environmental and morphological drivers of plant anatomical adaptations to drought and cold in Himalayan graminoids

Arid

DOI	10.1111/oik.06451
	Disentangling evolutionary, environmental and morphological drivers of plant anatomical adaptations to drought and cold in Himalayan graminoids
	Dolezal, Jiri 1,2; Klimes, Adam 1,3; Dvorsky, Miroslav 1; Riha, Pavel 1; Klimesova, Jitka 1,3; Schweingruber, Fritz 4
通讯作者	Dolezal, Jiri
来源期刊	OIKOS
ISSN	0030-1299
EISSN	1600-0706
出版年	2019
卷号	128 期号:11 页码:1576-1587
英文摘要	Understanding what determine plants ability to survive drought and cold is crucial for predicting how plants may respond to ongoing climate change. Plant survival strategies are usually characterized by morphological and physiological adaptations, while their underlying anatomical settings are largely unknown. Woody angiosperms and herbaceous dicots have repeatedly evolved small water transporting conduits and large storage parenchyma tissues at colder or drier places to cope with freezing- and drought-induced damages. However, whether these adaptations are also valid for graminoids remains unclear. Here we show that stem anatomical variations in grasses, sedges and rushes dominating in western Himalayan grasslands are driven by elevation and soil moisture via control over aboveground plant stature and belowground clonal growth, while phylogenetic constraints have only a weak effect. Phylogenetic comparative analyses controlling for confounding factors showed that the elevation-related cooling controls the conductive system through reduced vessel diameter and extended assimilatory and storage tissues with more chlorenchyma and less sclerenchyma around vessels. The soil moisture deficit, on the other hand, determines stabilization structures by promoting short-rhizomatous turf graminoids with hollow stems, thicker epidermis and deep adventitious roots in dry steppes and semi-deserts. Saline wetlands and moist alpine pastures promote long-rhizomatous short-stature plants with lower need for mechanical support (absence of hollow stem) and exposure to high evaporative forcing (thinner epidermis). Observed trends of decreasing vessel sizes and lignification rate with elevation supports the existing knowledge that narrower vessels and extensive parenchyma assist plants to grow in cold environments by avoiding freezing-induced cavitation. Our results bring novel information on ecological drivers influencing the evolution of anatomical adaptations in high mountain graminoids. Distinct grassland types, covering elevations from 2650 to 6150 m, harbor unrelated species with different evolutionary histories that have converged towards similar anatomical structures.
英文关键词	comparative plant anatomy evolutionary inertia gradient analysis grasses Himalaya parenchyma cells phylogeny sclerenchyma vessels
类型	Article
语种	英语
国家	Czech Republic ; USA ; Switzerland
收录类别	SCI-E
WOS记录号	WOS:000493574400005
WOS关键词	PHYLOGENETIC SIGNAL ; VASCULAR PLANTS ; XYLEM ; MODELS ; PARENCHYMA ; DIAMETER ; PATTERNS ; LADAKH ; SHAPE
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
EI主题词	2019-11-01
来源机构	University of Arizona
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310484
作者单位	1.Acad Sci Czech Republ, Inst Bot, Trebon, Czech Republic; 2.Univ Arizona, Lab Tree Ring Res, Tucson, AZ USA; 3.Charles Univ Prague, Fac Sci, Dept Bot, Prague, Czech Republic; 4.WSL, Swiss Fed Res Inst, Birmensdorf, Switzerland
推荐引用方式 GB/T 7714	Dolezal, Jiri,Klimes, Adam,Dvorsky, Miroslav,et al. Disentangling evolutionary, environmental and morphological drivers of plant anatomical adaptations to drought and cold in Himalayan graminoids[J]. University of Arizona,2019,128(11):1576-1587.
APA	Dolezal, Jiri,Klimes, Adam,Dvorsky, Miroslav,Riha, Pavel,Klimesova, Jitka,&Schweingruber, Fritz.(2019).Disentangling evolutionary, environmental and morphological drivers of plant anatomical adaptations to drought and cold in Himalayan graminoids.OIKOS,128(11),1576-1587.
MLA	Dolezal, Jiri,et al."Disentangling evolutionary, environmental and morphological drivers of plant anatomical adaptations to drought and cold in Himalayan graminoids".OIKOS 128.11(2019):1576-1587.