From leaf to whole-plant water use efficiency (WUE) in complex canopies: Limitations of leaf WUE as a selection target

Medrano, H.; Tomás, Magdalena; Martorell, Sebastián; Flexas, Jaume; Hernández, E. S.; Rosselló, Joan; Pou, Alícia; Escalona, J.M.; Bota, Josefina

doi:10.1016/j.cj.2015.04.002

Cited by 392 publications

(256 citation statements)

References 28 publications

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“…Our observations are consistent with the results of previous studies on reactions of various plant species tested under hot and dry growth conditions (Gratani et al 2000, Guo et al 2006, Wikberg & Ogren 2007, Medrano et al 2015. It has been demonstrated that drought causes a significant increase, while high temperature causes a significant decrease, in the intrinsic water use efficiency (WUEi, A/gs) for several forest tree species, e.g., Populus spp.…”

Section: Discussionsupporting

confidence: 82%

“…Induced inhibition of photosynthesis and oxidative stress well reveal the effect of lack of water in the cell, reducing plant dry biomass accumulation and productivity (Griffin et al 2004, Wahid et al 2007. It has been demonstrated that the inhibition of photosynthesis and magnitude of oxidative stress strength largely depends on stomatal conductivity (Bacelar et al 2007, Medrano et al 2015. Initial response to the reduced amount of water in soil is stomatal closure, which decreases evaporation, gas exchange intensity and intercellular CO2 concentration, thus reducing photosynthetic productivity (Bacelar et al 2007, Song et al 2014.…”

Section: Introductionmentioning

confidence: 99%

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Response of juvenile progeny of seven forest tree species and their populations to simulated climate change-related stressors, heat, elevated humidity and drought

Pliūra¹,

Jankauskienė²,

Lygis³

et al. 2018

iForest

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Response of juvenile progeny of seven forest tree species and their populations to simulated climate change-related stressors, heat, elevated humidity and drought Alfas Pliūra The study aimed to evaluate response and phenotypic plasticity of juvenile progeny of seven forest tree species Pinus sylvestris, Picea abies, Quercus robur, Fraxinus excelsior, Alnus glutinosa, Betula pendula and Populus tremula and their populations to climate change-related stressors, simulated in a phytotron -heat and elevated humidity and heat and drought -in comparison to performance in ambient (control) conditions. Treatment effect on sapling morphometric, physiological and biochemical traits was significant except for health condition, transpiration and photosynthetic rates and water use efficiency (WUE). Species effect and species-by-treatment interaction were strongly significant in most traits studied, indicating a great inter-specific variability of responses to the applied treatments. Compared to control, stem diameter increment was lower for most species following both hot-wet and hotdry treatments, while treatment impact on height increment was less pronounced and sometimes even positive. Drought caused significant defoliation in P. tremula, A. glutinosa and B. pendula, while under hot-wet treatment the defoliation in most species was lower than in control. Following hot dry treatment, WUE in P. abies, P. sylvestris and B. pendula was lower than following both hot-wet treatment and control, while in P. tremula, A. glutinosa and Q. robur WUE was higher. This suggests that the latter species are able to maintain a balance between photosynthesis and transpiration. Photosynthetic rate was highest in P. tremula, B. pendula and A. glutinosa, however it was much more negatively affected by water deficit in these three species than in other tested species. In most cases, drought had a negative effect on production of pigments in deciduous tree species, which, together with increased amounts of malondialdehyde and hydrogen peroxide, indicated a presence of an oxidative stress. Significant population effect and population-by-treatment interactions found for most traits showed different plasticity and response of tree populations to the treatments. Although, only 19% of the populations showed significant ecovalencies. Some of the observed reactions may not be considered as adaptive acclimation as decreasing growth of some species and populations indicates deteriorating performance which may lead to changes in their competitiveness, thus compromising regeneration, persistence of natural successions and sustainability of forest ecosystems. Keywords: Climate Change, Stress, Growth, Physiology, Transpiration, Photosynthesis, Water Use Efficiency, Biochemical Parameters, Phenotypic Plasticity IntroductionOver the few last millennia forest tree species were subjected to conspicuous climatic and environmental changes and were forced to react to these changes by migration and genetic adaptation to new growing conditions (Huntley & Birks 1983)....

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Section: Discussionsupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Response of juvenile progeny of seven forest tree species and their populations to simulated climate change-related stressors, heat, elevated humidity and drought

Pliūra¹,

Jankauskienė²,

Lygis³

et al. 2018

iForest

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“…Only one QTL of TE was common to E d and growth (on LG 10), suggesting a dominating role of E n in determining the genetic variability of TE in the S×G population. A lot of genetic analyses of TE that are based on gas exchange in the daytime or δ 13 C may therefore miss important components that are unrelated to daytime physiology (40,41). In our study, this drawback was circumvented by using an integrated estimation of TE over several day-night cycles to reveal the effect of nighttime transpiration therein.…”

Section: Shared Genetic Determinisms For Nighttime Transpiration and Tementioning

confidence: 99%

Reduced nighttime transpiration is a relevant breeding target for high water-use efficiency in grapevine

Coupel‐Ledru

Lebon

Christophe

et al. 2016

Proc. Natl. Acad. Sci. U.S.A.

126

101

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Increasing water scarcity challenges crop sustainability in many regions. As a consequence, the enhancement of transpiration efficiency (TE)-that is, the biomass produced per unit of water transpired-has become crucial in breeding programs. This could be achieved by reducing plant transpiration through a better closure of the stomatal pores at the leaf surface. However, this strategy generally also lowers growth, as stomatal opening is necessary for the capture of atmospheric CO 2 that feeds daytime photosynthesis. Here, we considered the reduction in transpiration rate at night (E n ) as a possible strategy to limit water use without altering growth. For this purpose, we carried out a genetic analysis for E n and TE in grapevine, a major crop in drought-prone areas. Using recently developed phenotyping facilities, potted plants of a cross between Syrah and Grenache cultivars were screened for 2 y under well-watered and moderate soil water deficit scenarios. High genetic variability was found for E n under both scenarios and was primarily associated with residual diffusion through the stomata. Five quantitative trait loci (QTLs) were detected that underlay genetic variability in E n . Interestingly, four of them colocalized with QTLs for TE. Moreover, genotypes with favorable alleles on these common QTLs exhibited reduced E n without altered growth. These results demonstrate the interest of breeding grapevine for lower water loss at night and pave the way to breeding other crops with this underexploited trait for higher TE.night transpiration | transpiration efficiency | growth | stomata | QTL

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“…The Pearson correlation analysis showed that the response ratios of WUE to drought had a significant correlation with the air flow rate (Af), and a significant, negative relationship with CO 2 concentration and relative humidity (RH) among all plants (Table 2). Previous research has suggested that WUE is in part driven by changes in environmental conditions, such as relative humidity in the air and temperature [62], and the leaf position in the canopy can also have a marked effect on instantaneous leaf WUE [18].…”

Section: Relationship Of Gs Pn Tr and Wue With Environmental Factorsmentioning

confidence: 99%

“…It can be measured at different scales, ranging from instantaneous measurements on the leaf to more integrative measurements at the plant and crop level [18]. Most studies of WUE have used instantaneous measurements of leaf photosynthesis and transpiration to characterize environmental effects [6,19,20], although one study evaluated WUE at the whole-plant level and compared the instantaneous and whole-plant values [18]. In general, WUE has been reported to increase [5,12,21,22] and improve productivity and reduce water stress under drought conditions [7].…”

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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From leaf to whole-plant water use efficiency (WUE) in complex canopies: Limitations of leaf WUE as a selection target

Cited by 392 publications

References 28 publications

Response of juvenile progeny of seven forest tree species and their populations to simulated climate change-related stressors, heat, elevated humidity and drought

Response of juvenile progeny of seven forest tree species and their populations to simulated climate change-related stressors, heat, elevated humidity and drought

Reduced nighttime transpiration is a relevant breeding target for high water-use efficiency in grapevine

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

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