干旱区生态环境知识资源中心(Arid): Non-structural carbohydrate dynamics associated with antecedent stem water potential and air temperature in a dominant desert shrub

Arid

DOI	10.1111/pce.13749
	Non-structural carbohydrate dynamics associated with antecedent stem water potential and air temperature in a dominant desert shrub
	Guo, Jessica S.1,2; Gear, Linnea 3; Hultine, Kevin R.4; Koch, George W.1,2; Ogle, Kiona 1,2,5
通讯作者	Guo, Jessica S.
来源期刊	PLANT CELL AND ENVIRONMENT
ISSN	0140-7791
EISSN	1365-3040
出版年	2020
卷号	43 期号:6 页码:1467-1483
英文摘要	Non-structural carbohydrates (NSCs) are necessary for plant growth and affected by plant water status, but the temporal dynamics of water stress impacts on NSC are not well understood. We evaluated how seasonal NSC concentrations varied with plant water status (predawn xylem water potential, psi) and air temperature (T) in the evergreen desert shrub Larrea tridentata. Aboveground sugar and starch concentrations were measured weekly or monthly for ~1.5 years on 6-12 shrubs simultaneously instrumented with automated stem psychrometers; leaf photosynthesis (A(net)) was measured monthly for 1 year. Leaf sugar increased during the dry, premonsoon period, associated with lower psi (greater water stress) and high T. Leaf sugar accumulation coincided with declines in leaf starch and stem sugar, suggesting the prioritization of leaf sugar during low photosynthetic uptake. Leaf starch was strongly correlated with A(net) and peaked during the spring and monsoon seasons, while stem starch remained relatively constant except for depletion during the monsoon. Recent photosynthate appeared sufficient to support spring growth, while monsoon growth required the remobilization of stem starch reserves. The coordinated responses of different NSC fractions to water status, photosynthesis, and growth demands suggest that NSCs serve multiple functions under extreme environmental conditions, including severe drought.
英文关键词	antecedent conditions carbon-water relations creosote bush plant water potential starch sugar
类型	Article
语种	英语
国家	USA
收录类别	SCI-E
WOS记录号	WOS:000535850500010
WOS关键词	MEDITERRANEAN SUB-SHRUBS ; TROPICAL TREE SEEDLINGS ; OSMOTIC ADJUSTMENT ; SEASONAL DYNAMICS ; LARREA-DIVARICATA ; PHLOEM TRANSPORT ; STRESS TOLERANCE ; WOODY-PLANTS ; GROWTH-RATE ; DIE-OFF
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/2XILL650/318703
作者单位	1.No Arizona Univ, Dept Biol Sci, Box 5640he, Flagstaff, AZ 86011 USA; 2.No Arizona Univ, Ctr Ecosyst Sci & Soc, Flagstaff, AZ 86011 USA; 3.No Arizona Univ, Dept Chem & Biochem, Flagstaff, AZ 86011 USA; 4.Desert Bot Garden, Dept Res Conservat & Collect, Phoenix, AZ USA; 5.No Arizona Univ, Sch Informat Comp & Cyber Syst, Flagstaff, AZ 86011 USA
推荐引用方式 GB/T 7714	Guo, Jessica S.,Gear, Linnea,Hultine, Kevin R.,et al. Non-structural carbohydrate dynamics associated with antecedent stem water potential and air temperature in a dominant desert shrub[J],2020,43(6):1467-1483.
APA	Guo, Jessica S.,Gear, Linnea,Hultine, Kevin R.,Koch, George W.,&Ogle, Kiona.(2020).Non-structural carbohydrate dynamics associated with antecedent stem water potential and air temperature in a dominant desert shrub.PLANT CELL AND ENVIRONMENT,43(6),1467-1483.
MLA	Guo, Jessica S.,et al."Non-structural carbohydrate dynamics associated with antecedent stem water potential and air temperature in a dominant desert shrub".PLANT CELL AND ENVIRONMENT 43.6(2020):1467-1483.