02336naa a2200325 a 450000100080000000500110000800800410001910000220006024501200008226000090020230000140021152013010022565000260152665000240155265000100157665000150158665000240160165000100162565300250163565300370166065300220169765300250171970000210174470000200176570000250178570000170181070000200182770000230184777301400187021354002021-10-18       2021    bl uuuu     u00u1 u    #d1 aSIMEONE, M. L. F.  aEcophysiological characterization of sorghum genotypes submitted to water deficit tolerance.h[electronic resource]  c2021  ap. 69-83.  aSorghum [Sorghum bicolor (L.)] is one of the most drought tolerant cereal and many studies have been done to understand the mechanisms involved in this process. In this work, we evaluated in the greenhouse the effects of different levels of water stress on the ecophysiological characteristics and accumulation of soluble sugars in two contrasting sorghum [Sorghum bicolor (L.) Moench] inbred lines for drought tolerance: 9910032 (tolerant) and 9618158 (sensitive). Water stress was imposed in both genotypes at pre-flowering growth stage for two different time exposure: mild (6 days of drought); severe (12 days). Recovery treatments for each drought treatment were also done at six days after the stress. Sensitive and tolerant genotypes showed lower stomatal conductance and leaf water potential for all types of stress when compared to irrigated treatments. An increase in total soluble sugar content was observed in leafs of the two sorghum genotypes however higher in the tolerant line. Overall, the genotype 9910032 presented higher photosynthetic rate and grain yield in relation to the sensitive genotype 9615818, in the same water condition. These results indicated that sugar content is modified under water deficit conditions indicating that if might be involved in plant protection.  aDeficiência Hídrica  aEvapotranspiração  aGrão  aRendimento  aResistência a Seca  aSorgo  aAçúcares solúveis  aCaracterização ecofisiológica  aDéficit hídrico  aTaxa fotossintética1 aMAGALHAES, P. C.1 aCARNEIRO, N. P.1 aGOMES JÚNIOR, C. C.1 aAVILA, R. G.1 aSOUZA, T. C. de1 aOLIVEIRA, A. C. de  tIn: GOES, R. J. (org.). Cadeias produtivas e novas tecnologias: aspectos econômicos, ecológicos e sociais. Ponta Grossa: Atena, 2021.