Stomatal conductance and intrinsic water use efficiency in the drought year 2003: a case study of European beech

Hentschel, Rainer; Hommel, Robert; Poschenrieder, Werner; Grote, Rüdiger; Holst, Jutta; Biernath, Christian; Geßler, Arthur; Priesack, Eckart

doi:10.1007/s00468-015-1284-2

Cited by 38 publications

(23 citation statements)

References 162 publications

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“…According to previous studies, stomata not only control CO 2 flux, but also regulate water flux in plants to reduce water loss and, therefore, affect plant WUE [8][9][10][11][12]. The earliest leaf defense against desiccation is stomatal closure to avoid excessive water loss [13] since it is much quicker than changes in the root system, leaf area, and chloroplast ultrastructure.…”

Section: Introductionmentioning

confidence: 99%

The Responses of Plant Leaf CO2/H2O Exchange and Water Use Efficiency to Drought: A Meta-Analysis

et al. 2018

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Persistent drought severely inhibits plant growth and productivity, which negatively affects terrestrial primary productivity worldwide. Therefore, it is important to investigate the impacts of drought on plant leaf CO 2 /H 2 O exchange and water use efficiency. This study assessed the responses of net photosynthesis (Pn), stomatal conductance (Gs), transpiration (Tr), and instantaneous water use efficiency (WUE) to drought based on a worldwide meta-analysis of 112 published studies. The results demonstrated that drought decreased Pn, Tr, and Gs significantly and differently among different moderators. C 4 plants had smaller Pn reduction than C 3 plants, which gives C 4 plants an advantage in Pn. But their WUE decreased under drought conditions, indicating a great flexibility in C 4 WUE. Annual herbs sacrificed WUE (−6.2%) to maintain efficient Pn. Perennial herbs took a different strategy in response to drought with an increased WUE (25.1%). Deciduous tree species displayed a greater increase in WUE than conifers and evergreen species. Additionally, Gs had a significant correlation with Pn and Tr, but an insignificant correlation with WUE, which could be because WUE is affected by other factors (e.g., air flow, CO 2 concentration, and relative humidity). These findings have significant implications for understanding the worldwide effects of drought on plant leaf CO 2 /H 2 O exchange and water use efficiency.

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Section: Introductionmentioning

confidence: 99%

The Responses of Plant Leaf CO2/H2O Exchange and Water Use Efficiency to Drought: A Meta-Analysis

et al. 2018

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“…However, our results demonstrated that a reduction in g s and A caused a decrease in W g . This response reduces the intercellular partial pressure of CO 2 inside the leaf, consequently decreasing the flux of CO 2 to the carboxylation enzyme Rubisco and suppressing biomass production (Matteo et al 2014;Hentschel et al 2015). After rehydration, the recovery of gas exchange and Ѱ H₂Oleaf were incomplete.…”

Section: Discussionmentioning

confidence: 99%

Water deficit modifies the carbon isotopic composition of lipids, soluble sugars and leaves of Copaifera langsdorffii Desf. (Fabaceae)

et al. 2017

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Water defi cit is most frequent in forest physiognomies subjected to climate change. As a consequence, several tree species alter tissue water potential, gas exchange and production of carbon compounds to overcome damage caused by water defi ciency. Th e working hypothesis, that a reduction in gas exchange by plants experiencing water defi cit will aff ect the composition of carbon compounds in soluble sugars, lipids and vegetative structures, was tested on Copaifera langsdorffi i. Stomatal conductance, leaf water potential, and CO 2 assimilation rate declined after a period of water defi cit. After rehydration, leaf water potential and leaf gas exchange did not recover completely. Water defi cit resulted in 13 C enrichment in leaves, soluble sugars and root lipids. Furthermore, the amount of soluble sugars and root lipids decreased after water defi cit. In rehydration, the carbon isotopic composition and amount of root lipids returned to levels similar to the control. Under water defi cit, 13 C-enriched in root lipids assists in the adjustment of cellular membrane turgidity and avoids damage to the process of water absorption by roots. Th ese physiological adjustments permit a better understanding of the responses of Copaifera langsdorffi to water defi cit.

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“…Therefore, many researchers refer to the relative extractable soil water (REW) as a measure of soil water status (e.g., [4,23,[63][64][65][66]). To compare our Feddes parameters with critical REW values from the literature, we calculated the mean root-zone water contents corresponding to the reported critical REW according to the relations described by [64,66]:…”

Section: Relative Extractable Soil Water (Rew)mentioning

confidence: 99%

“…To be consistent with the literature [64,66], we chose θ at −300 cm pressure head (−0.03 MPa) for θ FC and θ at −16,300 cm pressure head (−1.6 MPa) for θ PWP .…”

Section: Relative Extractable Soil Water (Rew)mentioning

confidence: 99%

Using Sap Flow Data to Parameterize the Feddes Water Stress Model for Norway Spruce

Rabbel

Bogena

Neuwirth³

et al. 2018

Water

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Abstract:Tree water use is a key variable in forest eco-hydrological studies and is often monitored by sap flow measurements. Upscaling these point measurements to the stand or catchment level, however, is still challenging. Due to the spatio-temporal heterogeneity of stand structure and soil water supply, extensive measuring campaigns are needed to determine stand water use from sap flow measurements alone. Therefore, many researchers apply water balance models to estimate stand transpiration. To account for the effects of limited soil water supply on stand transpiration, models commonly refer to plant water stress functions, which have rarely been parameterized for forest trees. The aim of this study was to parameterize the Feddes water stress model for Norway spruce (Picea abies [L.] Karst.). After successful calibration and validation of the soil hydrological model HYDRUS-1D, we combined root-zone water potential simulations with a new plant water stress factor derived from sap flow measurements at two plots of contrasting soil moisture regimes. By calibrating HYDRUS-1D against our sap flow data, we determined the critical limits of soil water supply. Drought stress reduced the transpiration activity of mature Norway spruce at root-zone pressure heads <−4100 cm, while aeration stress was not observed. Using the recalibrated Feddes parameters in HYDRUS-1D also improved our water balance simulations. We conclude that the consideration of sap flow information in soil hydrological modeling is a promising way towards more realistic water balance simulations in forest ecosystems.

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Stomatal conductance and intrinsic water use efficiency in the drought year 2003: a case study of European beech

Cited by 38 publications

References 162 publications

The Responses of Plant Leaf CO2/H2O Exchange and Water Use Efficiency to Drought: A Meta-Analysis

The Responses of Plant Leaf CO2/H2O Exchange and Water Use Efficiency to Drought: A Meta-Analysis

Water deficit modifies the carbon isotopic composition of lipids, soluble sugars and leaves of Copaifera langsdorffii Desf. (Fabaceae)

Using Sap Flow Data to Parameterize the Feddes Water Stress Model for Norway Spruce

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