Constraints and potentials of future irrigation water availability on agricultural production under climate change

Elliott, Joshua; Deryng, Delphine; Müller, Christoph; Frieler, Katja; Konzmann, Markus; Gerten, Dieter; Glotter, Michael; Flörke, Martina; Wada, Yoshihide; Best, Neil; Eisner, Stephanie; Fekete, B M; Folberth, Christian; Foster, Ian; Gosling, Simon N.; Haddeland, Ingjerd; Khabarov, Nikolay; Ludwig, Fulco; Masaki, Yoshimitsu; Olin, Stefan; Rosenzweig, Cynthia; Ruane, Alex C.; Satoh, Yusuke; Schmid, Erwin; Stacke, Tobias; Tang, Qiuhong; Wisser, Dominik

doi:10.1073/pnas.1222474110

Cited by 898 publications

(574 citation statements)

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“…The plants engineered for water productivity, however, would offer the advantage that no technical equipment is necessary for establishing enhanced WUE and saving soil-borne water to better withstand periods of drought. The identification of ABA receptors for providing water productivity will aid in breeding programs and biotechnical efforts to reduce unsustainable water withdrawal (40) and to generate "more crop per drop" (35,39,41).…”

Section: Discussionmentioning

confidence: 99%

Leveraging abscisic acid receptors for efficient water use in Arabidopsis

Yang

Liu

Tischer

et al. 2016

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

111

141

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Plant growth requires the influx of atmospheric CO 2 through stomatal pores, and this carbon uptake for photosynthesis is inherently associated with a large efflux of water vapor. Under water deficit, plants reduce transpiration and are able to improve carbon for water exchange leading to higher water use efficiency (WUE). Whether increased WUE can be achieved without trade-offs in plant growth is debated. The signals mediating the WUE response under water deficit are not fully elucidated but involve the phytohormone abscisic acid (ABA). ABA is perceived by a family of related receptors known to mediate acclimation responses and to reduce transpiration. We now show that enhanced stimulation of ABA signaling via distinct ABA receptors can result in plants constitutively growing at high WUE in the model species Arabidopsis. WUE was assessed by three independent approaches involving gravimetric analyses, 13 C discrimination studies of shoots and derived cellulose fractions, and by gas exchange measurements of whole plants and individual leaves. Plants expressing the ABA receptors RCAR6/PYL12 combined up to 40% increased WUE with high growth rates, i.e., are water productive. Water productivity was associated with maintenance of net carbon assimilation by compensatory increases of leaf CO 2 gradients, thereby sustaining biomass acquisition. Leaf surface temperatures and growth potentials of plants growing under well-watered conditions were found to be reliable indicators for water productivity. The study shows that ABA receptors can be explored to generate more plant biomass per water transpired, which is a prime goal for a more sustainable water use in agriculture.carbon assimilation | drought resistance | water deficit | water productivity | water use efficiency P lants are ferocious consumers of water, and plant transpiration is the dominant vector for water mobilization from terrestrial surfaces to the atmosphere (1). Plant transpiration is sustained by efficient water uptake through the root systems, which can comprise 500 m 2 of root surface and 500 km in combined length even in a single barley plant. Water is the major factor limiting crop productivity in the field (2). Thus, more than two-thirds of the fresh water resources used globally are channeled into agriculture, thereby contributing to potential social conflicts over water (3).Whereas the gas exchange of CO 2 and water vapor at the stomatal pore is a physical process controlled by both the ratio in partial pressure gradients and gas diffusivities (4, 5), terrestrial plants are able to capture carbon more efficiently under water deficit. Both short-term leaf gas exchange measurements and 13 C isotope discrimination analyses revealed increases of the instantaneous water use efficiency (insWUE) and intrinsic WUE (iWUE), respectively, by a factor of 1.5-2.5 in wheat and other species (6, 7). The underlying mechanisms, however, are not fully elucidated. Gains in WUE have been found to be associated with trade-offs in growth potential (8-10). WUE is control...

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Section: Discussionmentioning

confidence: 99%

Leveraging abscisic acid receptors for efficient water use in Arabidopsis

Yang

Liu

Tischer

et al. 2016

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

111

141

View full text Add to dashboard Cite

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“…Similarly, community phylogenetics has recently seen important advances by drawing information from climate models to understand community assembly on geographic scales (Hawkins et al, 2014). Also of current interest are climatechange-induced transformations on agricultural systems (Image Team, 2001;Ramirez-Villegas et al, 2013), not restricted to food supply (Parry et al, 2004;Elliott et al, 2014), but including conservation issues (Hannah et al, 2013;Zarco-González et al, 2013). Although not exhaustive, this list of research interests clearly exemplifies the relevance of ecoClimate to multiple studies in the natural sciences.…”

Section: Potentiality Applicability and Relevancementioning

confidence: 99%

EcoClimate: a database of climate data from multiple models for past, present, and future for macroecologists and biogeographers

Varela²,

et al. 2015

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Abstract.-Studies in biogeography and macroecology have been increasing massively since climate and biodiversity databases became easily accessible. Climate simulations for past, present, and future have enabled macroecologists and biogeographers to combine data on species' occurrences with detailed information on climatic conditions through time to predict biological responses across large spatial and temporal scales. Here we present and describe ecoClimate, a free and open data repository developed to serve useful climate data to macroecologists and biogeographers. ecoClimate arose from the need for climate layers with which to build ecological niche models and test macroecological and biogeographic hypotheses in the past, present, and future. ecoClimate offers a suite of processed, multi-temporal climate data sets from the most recent multi-model ensembles developed by the Coupled Modeling Intercomparison Projects (CMIP5) and Paleoclimate Modeling Intercomparison Projects (PMIP3) across past, present, and future time frames, at global extents and 0.5° spatial resolution, in convenient formats for analysis and manipulation. A priority of ecoClimate is consistency across these diverse data, but retaining information on uncertainties among model predictions. The ecoClimate research group intends to maintain the web repository updated continuously as new model outputs become available, as well as software that makes our workflows broadly accessible.

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“…The lack of available water for agricultural production, energy projects, other forms of anthropogenic water consumption, and ecological use is already a major issue in many parts of the world that is expected to grow more severe with increasing population, higher food demand, rising temperatures, and changing precipitation patterns (Elliott et al, 2014). Climate change is expected to have a significant impact on various economic sectors (IPCC, 2014) but especially on agriculture because crops are heavily influenced by weather conditions during their life cycles (Bernetti et al, 2012).…”

Section: Introductionmentioning

confidence: 99%