02027naa a2200301 a 450000100080000000500110000800800410001902200140006002400500007410000180012424501270014226000090026952011020027865000160138065000190139665000160141565000140143165000180144565000150146365000200147865000210149865300190151970000180153870000200155670000200157670000220159677301070161820880092018-05-02       2018    bl uuuu     u00u1 u    #d  a1807-19297 a10.1590/1807-1929/agriambi.v22n4p231-2362DOI1 aCOELHO, D. S.  aGas exchange and organic solutes in forage sorghum genotypes grown under different salinity levels.h[electronic resource]  c2018  aAdaptation of plants to saline environments depends on the activation of mechanisms that minimize the effects of excess ions on vital processes, such as photosynthesis. The objective of this study was to evaluate the leaf gas exchange, chlorophyll, and organic solute in ten genotypes of forage sorghum irrigated with solutions of different salinity levels. The experiment was conducted in a randomized block design, in a 10 x 6 factorial arrangement, with three replications, using ten genotypes - F305, BRS-655, BRS-610, Volumax, 1.015.045, 1.016.005, 1.016.009, 1.016.013, 1.016.015 and 1.016.031 - and six saline solutions, with electrical conductivity (ECw) of 0, 2.5, 5.0, 7.5, 10 and 12.5 dS m-1. The photosynthetic activity in forage sorghum plants reduces with increasing salinity, and this response was found in the ten genotypes evaluated. The chlorophyll and protein contents were not affected by salinity, whereas carbohydrates and amino acid contents increased with increasing EC w. Soluble sugars are essential for osmoregulation of forage sorghum due to its high content in leaves.  aChlorophyll  aPhotosynthesis  aSalt stress  aClorofila  aFotossíntese  aSalinidade  aSorghum Bicolor  aSorgo forrageiro  aForage sorghum1 aSIMOES, W. L.1 aSALVIANO, A. M.1 aMESQUITA, A. C.1 aALBERTO, K. da C.  tRevista Brasileira de Engenharia Agrícola e Ambiental, Campina Grandegv. 22, n. 4, p. 231-236, 2018.