Osmotic adjustment in wheat in relation to foliar application of selenium timing under water deficit stress

Field experiment was conducted at the Ahwaz Research Center for improvement of wheat (Triticum aestivum L.) yield to ascertain the role of selenium foliar application in two times (Floral initiation and the end of flowering) and cellular membrane stability (CMS) in sustaining grain yield and its stability under water deficit conditions. Under simulated water deficit conditions of the field, the selenium foliar timing differed considerably regarding CMS,ranging from 899.877 mmohs/cm at floral initiation and from 1156.298 mmohs/cm at the end of flowering. When the mean values of chemical markers [Malon di aldehyde (MDA) and Tirosine (TY)] were low, regressed against cellular membrane destruction, the correlation coefficient value increased with the increase in moisture stress, protect cellular with grain yield at the highest line source water deficit level. CMS, markers rate and grain yield were measured in the simulated water deficit condition in the field. Besides, high CMS maintained yield stability through maintenance of turgor under water deficit during reproductive period of crop growth. The results indicated that low rate of markers such as MDA and TY caused yield improvment with CMS regulated.