BEZERRA NETO Egídio1, BARRETO Levy Paes1, BURITY Hélio Almeida2, STAMFORD Newton Pereira1, SILVA Jaime Hallison Bezerra da1
(1) Universidade Federal Rural de Pernambuco, Recife-PE, 52171-030,
Brazil
(2) IPA, Av. Gal. San Martin, 1371 - Bonji. Recife-PE. 50761-000, Brazil
An experiment was performed in a green house aiming to evaluate the effect of NaCl on the soluble carbohydrate and the proline content of three genotypes of forage sorghum with different tolerances to salt stress. The plants were grown in Hoagland and Arnon nutrient solutions with and without sodium chloride, according to treatments. Sorghum genotypes were IPA 322-1-3(5), IPA 02-03-01 and IPA 78-Ca84. The treatments were 0, 50 and 100 mol.m-3 of NaCl. Soluble carbohydrate content increased in all genotypes by the addition of 100 mol.m-3 of NaCl while sugar content was not affected by 50 mol. m-3 of NaCl. Proline content increased only in the IPA 02-03-01 genotype growth in 100 mol.m-3 of NaCl.
Key words: osmotic adjustment, compatible solutes, sugar