Seedling parameters of some sunflower cultivars as affected by seed priming and salinity stress
By: A. A. Kandil, A. E. Sharief, Amira A. Mamoon
Key Words: Sunflower cultivars, Salinity levels, Seed priming, Seedling parameters.
Int. J. Agr. Agri. Res. 9(2), 117-136, August 2016.
In order to study the effect of priming and non-priming seed of some sunflower cultivars i.e. Sakha 53, Giza 102, Line S 102 and Line S 1 under different salinity concentrations i.e. 0, 5, 10, 15, 20, 25, 30, 35 dSm-1 NaCl on early seedling parameters. Seedling parameters i.e. shoot and root lengths, shoot and root fresh weights, shoot and root dry weights, seedling height reduction, relative dry weight and relative dry weight were determined. Priming seed in NaCl 1% or KNO3 0.3% enhanced seedling parameters compared without seed primed. Line S 102 surpassed of Sakha 53, Giza 102 and Line S 1 in shoot length, root length, root fresh and dry weight, and shoot fresh and dry weight. Line S 1 surpassed studied genotypes in seedling height reduction. Cumulative salinity levels from 0 to 35 dSm-1 NaCl significantly decreased all studied characters, except seedling height reduction percentage which was increased. The uppermost averages of studied characters were obtained from seed priming under the control treatment of salinity, while the lowest averages of these characters were produced from non-priming under highest salinity level i.e. 35 dSm-1 NaCl. It could be summarized that priming seeds of Line S 102 recorded highest seedling parameter under salinity stress that could be put in breeding program for improving sunflower production under newly reclaimed soils.