干旱区生态环境知识资源中心(Arid): Biophysically Informed Imaging Acquisition of Plant Water Status

Arid

DOI	10.3389/ffgc.2020.589493
	Biophysically Informed Imaging Acquisition of Plant Water Status
	Beverly, Daniel P.; Guadagno, Carmela R.; Ewers, Brent E.
通讯作者	Beverly, DP
来源期刊	FRONTIERS IN FORESTS AND GLOBAL CHANGE
EISSN	2624-893X
出版年	2020
卷号	3
英文摘要	Vegetation controls carbon and water fluxes because of the fundamental tradeoff between carbon dioxide uptake and water loss occurring when stomata are open. Quantifying the rates of this exchange typically requires either intensive gas exchange or destructive harvesting of tissues and mass spectrometry analyses. Recent developments in high-throughput methods have enhanced our capacity to empirically test plant-environmental interactions. The vast integration characterizing satellite remote sensing methods masks organ-level physiological mechanisms limiting the predictive capability of current process models. Hence, more ground truth studies are necessary to determine the amount of mechanistic information needed to improve our understanding of forest, crop, and land management. Imaging methodologies, such as thermal and chlorophyll a fluorescence, are currently used to collect information for relevant traits such as water use, growth, and stress response. We tested these techniques during progressive drought across species with different susceptibility in controlled greenhouse conditions. We chose two highly represented tree species in North America: the gymnosperm Pinus ponderosa and the angiosperm Populus tremuloides. To better explore the whole drought response parameter space, we also tested a crop (Brassica rapa) and desert shrub (Artemisia tridentata). Thermal and fluorescence images of the canopy were coupled with leaf-level measurements as we performed three tests to predict drought response using (1) leaf temperature, (2) chlorophyll a fluorescence, and (3) the combination of the two. At 5 days of drought, leaf temperature increased 7 and 10%, accounting for 63 and 73% of the variation in stomatal conductance for both tree species, respectively. The fluorescence signal from images decreased similar to 12% and similar to 83% in moderately and severely droughted leaves respectively, reaching zero at mortality. Leaf water status was then predicted using a Bayesian approach that incorporated measurements' uncertainty and parsimony in the analysis of the parameters. Changes in canopy temperature provided confident predictions for the reductions of daily evapotranspiration at the onset of drought. Empirically combining thermal and fluorescence measurements improved predictions (R-2 = 0.81) of midday leaf water potential compared to univariate models. Our results represent an important step toward quantifying plant water status during drought using first principles that do not require species-specific information.
英文关键词	aspen chlorophyll a fluorescence drought phenotyping leaf water potential ponderosa pine remote sensing thermal imaging
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000589354600001
WOS关键词	INDUCED TREE MORTALITY ; CHLOROPHYLL-A FLUORESCENCE ; VAPOR-PRESSURE DEFICIT ; CHAIN MONTE-CARLO ; GAS-EXCHANGE ; LEAF TEMPERATURE ; STOMATAL CONTROL ; QUANTIFYING UNCERTAINTY ; SPECTRAL REFLECTANCE ; ATMOSPHERIC DROUGHT
WOS类目	Ecology ; Forestry
WOS研究方向	Environmental Sciences & Ecology ; Forestry
Scopus学科分类	Univ Wyoming, Water Resources Environm Sci & Engn, Laramie, WY 82071 USA.
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/334735
作者单位	[Beverly, Daniel P.; Guadagno, Carmela R.; Ewers, Brent E.] Univ Wyoming, Dept Bot, Laramie, WY 82071 USA; [Beverly, Daniel P.] Univ Wyoming, Water Resources Environm Sci & Engn, Laramie, WY 82071 USA; [Ewers, Brent E.] Univ Wyoming, Program Ecol, Laramie, WY 82071 USA
推荐引用方式 GB/T 7714	Beverly, Daniel P.,Guadagno, Carmela R.,Ewers, Brent E.. Biophysically Informed Imaging Acquisition of Plant Water Status[J],2020,3.
APA	Beverly, Daniel P.,Guadagno, Carmela R.,&Ewers, Brent E..(2020).Biophysically Informed Imaging Acquisition of Plant Water Status.FRONTIERS IN FORESTS AND GLOBAL CHANGE,3.
MLA	Beverly, Daniel P.,et al."Biophysically Informed Imaging Acquisition of Plant Water Status".FRONTIERS IN FORESTS AND GLOBAL CHANGE 3(2020).