Resumo

ARGENTEL, L; FONSECA, I; GONZALEZ, L. M  e  LOPEZ, D. R. Content of proline, glycine betaine and soluble protein 12 TOTAL Cuban varieties of wheat in saline conditions. cultrop [online]. 2010, vol.31, n.4, pp. 00-00. ISSN 0258-5936.

Proline, glicine betaíne and total soluble protein contents were determined in 12 Cuban wheat varieties, of T. aestivum and T. durum species, growing under saline conditions. Thus, two experimental variants were conducted based on a concentrated nutrient solution. The first treatment became salty with NaCl to an electric conductivity of 8 dS.m-1 and the control treatment without applying NaCl. This test was performed under hidropony conditions and treatments were applied from sowing time until 45 days after seed germination, when determinations were recorded. Data obtained in the control and stress treatments were compared by t-student test for 5 and 1 % significant levels. As a result, an important increment of proline content was obtained in most varieties, the accumulation in foliage being bigger than in roots. Glicine betaíne content was highly significant just in wheat varieties of T. durum species. Total soluble protein content showed a rather variable behaviour, even among varieties from the same species; that is why it was not considered an efficient indicator of salinity tolerance. The varieties Cuba-C-204, INIFAT RM-36, INIFAT RM-37 and INIFAT RM-26 showed the highest proline accumulation.

Palavras-chave : proline; glicine betaíne; total soluble proteins; wheat; salinity.

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