01868naa a2200193 a 450000100080000000500110000800800410001910000160006024501490007626000090022552012860023465000120152065000130153270000180154570000200156370000180158370000240160177300490162520959962018-09-27       2018    bl uuuu     u00u1 u    #d1 aCRUZ, J. L.  aElevated CO2 reduces whole transpiration and substantially improves root production of cassava grown under water deficit.h[electronic resource]  c2018  aWeevaluated the possibility of elevated CO2 concentration ([CO2]) to reduce the negative effect of drought on growth and physiological parameters of cassava (Manihot esculenta Crantz). Plants were grown with 390 ppm or750 ppm of CO2, under well-watered or under water deficit conditions. The study was conducted in a climate-controlled greenhouse using 14 L pots, for 100 days. For any value of fraction of transpirable soil water (FTSW) the carbon assimilation was always higher for plants grown under elevated [CO2]. Still, elevated [CO2] reduced the negative effect of drought on transpiration, water use efficiency, all growth measures and harvest index. Elevated [CO2] increased the dry matter of tuber roots (DMTR) of wellwatered plants by 17.4%. The DMTR of plants grown under water were 124.4 g and 58.9 g, respectively, for plants under elevated and ambient CO2, an increase of 112%. Thus, the CO2 effect was relatively stronger to the production of tuberous roots when cassava were subjected to water-deficit. Our results suggest that cassava tuber production might be resilient to changes in precipitation that will accompany higher atmospheric CO2 and reinforce cassava as a specie that can significantly contribute to mitigate hunger in a changing climate environment.  aCassava  aMandioca1 aLECAIN, D. R.1 aALVES, A. A. C.1 aCOELHO, E. F.1 aCOELHO FILHO, M. A.  tArchives of Agronomy and Soil Science, 2018.