Effect of nano titanium dioxide on growth characteristics and antioxidant enzymes of Camelina (Camelina sativa) seedlings under the influence of sodium nitroprusside in salinity conditions

The effects of nano-TiO۲ on growth indices and antioxidant enzyme activity of camelina seedlings under sodium nitroprusside and salinity stress was investigated in a factorial experiment with four replications in the crop physiology research laboratory of Bu-Ali Sina University. Nano Titanium Dioxide was studied at ۵۰۰, ۱۰۰۰, and ۲۰۰۰ mg/L under ۵۰ and ۱۰۰ Mm sodium chloride salinity with ۱۰۰ μM sodium nitroprusside and control. Salinity stress declined the growth characteristics and germination indices such as, germination percentage, germination rate, mean germination time, vigor index, radicle length, plumule length and the membrane electrolyte leakage increased. In the presence of nano-TiO۲, most of germination indices improved and activity of CAT, APX and SOD enzymes increased. Sodium nitroprusside decreased the adverse effects of salinity stress and adjusted the membrane electrolyte leakage. Also the interaction effect of sodium nitroprusside and nano-TiO۲ was significant on the most studied traits. Nano-TiO۲ (۱۰۰۰ mg/L) with ۱۰۰ μM SNP improved SOD, APX and CAT enzyme activities under ۱۰۰ Mm salinity stress. According to the results, it seems that sodium nitroprusside diminished the adverse effects of salinity stress and impressed the nano-TiO۲ performance on barley germination indices and antioxidant enzymes content.

کلیدواژه ها:

seed vigor ، sodium chloride ، germination indices ، electrolyte leakage