Photosynthetica 2014, 52(2):211-216 | DOI: 10.1007/s11099-014-0022-0

Does elevated CO2 protect photosynthesis from damage by high temperature via modifying leaf water status in maize seedlings?

M. N. Qu1,2,*, J. A. Bunce2, Z. S. Shi1
1 Department of Agronomy, Shenyang Agricultural University, Shenyang, China
2 Crop Systems and Global Change Laboratory, USDA ARS, Beltsville, USA

We hypothesized that decreased stomatal conductance (g s) at elevated CO2 might decrease transpiration (E), increase leaf water potential (ΨW), and thereby protect net photosynthesis rate (P N) from heat damage in maize (Zea mays L) seedlings. To separate long-term effects of elevated CO2, plants grew at either ambient CO2 or elevated CO2. During high-temperature treatment (HT) at 45°C for 15 min, leaves were exposed either to ambient CO2 (380 μmol mol-1) or to elevated CO2 (560 μmol mol-1). HT reduced P N by 25 to 38% across four CO2 combinations. However, the g s and E did not differ among all CO2 treatments during HT. After returning the leaf temperature to 35°C within 30 min, g s and E were the same or higher than the initial values. Leaf water potential (ΨW) was slightly lower at ambient CO2, but not at elevated CO2. This study highlighted that elevated CO2 failed in protecting P N from 45°C via decreasing g s and ΨW.

Keywords: heat stress, leaf water potential; net photosynthesis; stomatal conductance; vapor pressure deficit

Received: March 12, 2013; Accepted: August 28, 2013; Published: June 1, 2014Show citation

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Qu, M.N., Bunce, J.A., & Shi, Z.S. (2014). Does elevated CO2 protect photosynthesis from damage by high temperature via modifying leaf water status in maize seedlings? Photosynthetica, 52(2), 211-216. doi: 10.1007/s11099-014-0022-0.
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    References

    1. Ameye, M., Wertin, T.M., Bauweraerts, I., et al.: The effect of induced heat waves on Pinus taeda and Quercus rubra seedings in ambient and elevated CO2 atmospheres. - New Phytol. 196: 448-46, 2012. Go to original source...
    2. Barnaby, J.Y., Sicher. R.C: Impact of carbon dioxide enrichment on the responses of maize leaf transcripts and metabolites to water stress. - Physiol. Plantarum 144: 238-253, 2012.
    3. Bunce, J. A.: Acclimation of photosynthesis to temperature in eight cool and warm climate herbaceous C3 species: temperature dependence of parameters of a biochemical photosynthesis model. - Photosynth. Res. 63: 59-67, 2000a. Go to original source...
    4. Bunce, J.A.: Responses of stomatal conductance to light, humidity and temperature in winter wheat and barley grown at three concentrations of carbon dioxide in the field. - Glob. Change Biol. 6: 371-382, 2000b. Go to original source...
    5. Bunce, J. A.: Effects of water vapor pressure difference on leaf gas exchange in potato and sorghum at ambient and elevated carbon dioxide under field conditions. - Field Crop Res. 82: 37-47, 2003. Go to original source...
    6. Bunce, J.A.: How do leaf hydraulics limit stomatal conductance at high water vapour pressure deficits? - Plant Cell Environ. 29: 1644-1650, 2006. Go to original source...
    7. Dai, Z., Ku, M.S.B., Edwards, G.E.: Control of photosynthesis and leaf conductance in Ricinus communis L. (castor bean) by leaf to air vapor pressure deficit. - Plant Physiol. 99: 1426-1434, 1992. Go to original source...
    8. Groisman, P.Y., Knight, R.W.: Prolonged dry episodes over the conterminous United States: new tendencies emerging during the last 40 years - J. Climate 21: 1850-1862, 2008.
    9. Gutiérrez, D., Gutiérrez, E., Pérez, P., et al.: Acclimation to future atmospheric CO2 levels increases photochemical efficiency and mitigates photochemistry inhibition by warm temperatures in wheat under field chambers. - Physiol. Plantarum 137: 86-100, 2009. Go to original source...
    10. Hamilton, E.W, Heckathorn, S.A., Joshi, P., Wang, D., Barua, D.: Interactive effects of elevated CO2 and growth temperature on the tolerance of photosynthesis to acute heat stress in C3 and C4 species. - J. Integr. Plant Biol. 50: 1375-1387, 2008. Go to original source...
    11. Hay, R.K.M., Walker, A.J.: An Introduction to the Physiology of Crop Yield. Pp. 292. Longman Scientific & Technical, New York 1989.
    12. Kim S.H., Gitz D.C., Sicherb R.C., et al.: Temperature dependence of growth, development, and photosynthesis in maize under elevated CO2. - Environ. Exp. Bot. 61: 224-236, 2007. Go to original source...
    13. Luo, H.B., Ma, L., Xi, H.F., et al.: Photosynthetic responses to heat treatments at different temperatures and following recovery in Grapevine (Vitis amurensis L.) leaves. - PLOS ONE: doi:10.1371/journal.pone.0023033, 2011. Go to original source...
    14. Maherali, H., Johnson, H.B., Jackson, R.B.: Stomatal sensitivity to vapour pressure difference over a subambient to elevated CO2 gradient in a C3/C4 grassland. - Plant Cell Environ. 26: 1297-1306, 2003. Go to original source...
    15. Mearns, L.O., Katz, R.W., Schneider, S.H.: Extreme high temperature events: changes in their probabilities with changes in mean temperature. - J. Clim. Appl. Meteorol. 23, 1601-1613, 1984. Go to original source...
    16. Orbovic V., Poff, K.L.: Effect of temperature on growth and phototropism of Arabidopsis thaliana seedlings. - J. Plant Growth Regul. 26: 222-228, 2007. Go to original source...
    17. Ranney, T.G., Peet, M.M.: Heat tolerance of five taxa of birch (Betula): physiological responses to supraoptimal leaf temperatures - J. Am. Soc. Hortic. Sci. 119: 243-248, 1994. Go to original source...
    18. Sicher, R.C., Barnaby, J.Y.: Impact of carbon dioxide enrichment on the responses of maize leaf transcripts and metabolites to water stress. - Physiol. Plantarum 144: 238-253, 2012. Go to original source...
    19. Taub, D.R., Seemann, J.R., Coleman, J.S.: Growth in elevated CO2 protects photosynthesis against high-temperature damage. - Plant Cell Environ. 23: 649-656, 2000. Go to original source...
    20. Wang, D., Heckathorn, S.A., Barua, D., et al.: Effects of elevated CO2 on the tolerance of photosynthesis to acute heat stress in C3, C4, and CAM species. - Am. J. Bot. 95: 165-176, 2008. Go to original source...
    21. Warren, G.R., Marin, M.A., Teutonico, R.: Isolation of mutations affecting the development of freezing tolerance in Arabidopsis thaliana (L.). Heynh. - Plant Physiol. 111: 1011-1019, 1996. Go to original source...
    22. Xu, Z.Z, Zhou, G.S., Han, G.X., Li, Y.J.: Photosynthetic potential and its association with lipid peroxidation in response to high temperature at different leaf ages in maize. - J. Plant Growth Regul. 30: 41-50, 2011. Go to original source...

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