000863326 001__ 863326
000863326 005__ 20190919112504.0
000863326 0247_ $$2doi$$a10.3389/fpls.2019.00330
000863326 037__ $$aFZJ-2019-03406
000863326 082__ $$a570
000863326 1001_ $$0P:(DE-Juel1)178995$$aGöbel, Leonie$$b0$$ufzj
000863326 245__ $$aThe Role of Low Soil Temperature for Photosynthesis and Stomatal Conductance of Three Graminoids From Different Elevations
000863326 260__ $$aLausanne$$bFrontiers Media88991$$c2019
000863326 3367_ $$2DRIVER$$aarticle
000863326 3367_ $$2DataCite$$aOutput Types/Journal article
000863326 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article$$bjournal$$mjournal$$s1568885087_22608
000863326 3367_ $$2BibTeX$$aARTICLE
000863326 3367_ $$2ORCID$$aJOURNAL_ARTICLE
000863326 3367_ $$00$$2EndNote$$aJournal Article
000863326 520__ $$aIn high-elevation grasslands, plants can encounter periods with high air temperature while the soil remains cold, which may lead to a temporary mismatch in the physiological activity of leaves and roots. In a climate chamber experiment with graminoid species from three elevations (4400, 2400, and 250 m a.s.l.), we tested the hypothesis that soil temperature can influence photosynthesis and stomatal conductance independently of air temperature. Soil monoliths with swards of Kobresia pygmaea (high alpine), Nardus stricta (lower alpine), and Deschampsia flexuosa (upper lowland) were exposed to soil temperatures of 25, 15, 5, and -2∘C and air temperatures of 20 and 10∘C for examining the effect of independent soil and air temperature variation on photosynthesis, leaf dark respiration, and stomatal conductance and transpiration. Soil frost (-2∘C) had a strong negative effect on gas exchange and stomatal conductance in all three species, independent of the elevation of origin. Leaf dark respiration was stimulated by soil frost in D. flexuosa, but not in K. pygmaea, which also had a lower temperature optimum of photosynthesis. Soil cooling from 15 to 5∘C did not significantly reduce stomatal conductance and gas exchange in any of the species. We conclude that all three graminoids are able to maintain a relatively high root water uptake in cold, non-frozen soil, but the high-alpine K. pygmaea seems to be especially well adapted to warm shoot – cold root episodes, as it has a higher photosynthetic activity at 10 than 20∘C air temperature and does not up-regulate leaf dark respiration upon soil freezing, as was observed in the grasses from warmer climates.
000863326 588__ $$aDataset connected to CrossRef
000863326 7001_ $$0P:(DE-HGF)0$$aConers, Heinz$$b1
000863326 7001_ $$0P:(DE-HGF)0$$aHertel, Dietrich$$b2
000863326 7001_ $$0P:(DE-HGF)0$$aWillinghöfer, Sandra$$b3
000863326 7001_ $$0P:(DE-HGF)0$$aLeuschner, Christoph$$b4$$eCorresponding author
000863326 773__ $$0PERI:(DE-600)2711035-7$$a10.3389/fpls.2019.00330$$gVol. 10, p. 330$$p330$$tFrontiers in Functional Plant Ecology$$v10$$x1664-462X$$y2019
000863326 909CO $$ooai:juser.fz-juelich.de:863326$$pextern4vita
000863326 9101_ $$0I:(DE-588b)5008462-8$$6P:(DE-Juel1)178995$$aForschungszentrum Jülich$$b0$$kFZJ
000863326 915__ $$0StatID:(DE-HGF)0040$$2StatID$$aPeer Review unknown
000863326 915__ $$0StatID:(DE-HGF)0300$$2StatID$$aDBCoverage$$bMedline
000863326 915__ $$0StatID:(DE-HGF)0310$$2StatID$$aDBCoverage$$bNCBI Molecular Biology Database
000863326 920__ $$lno
000863326 9801_ $$aEXTERN4VITA
000863326 980__ $$ajournal
000863326 980__ $$aUSER
000863326 980__ $$aI:(DE-Juel1)IBG-2-20101118
000863326 980__ $$aI:(DE-Juel1)ZB-20090406