International network for natural sciences – research journal
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Germination characters as affected by seed priming of some sunflower cultivars under salinity stress

By: A. A. Kandil, A. E. Sharief, Amira A. Mamoon

Key Words: Sunflower cultivars, Seed priming, Salinity concentrations, Germination parameters

Int. J. Agr. Agri. Res. 9(2), 100-116, August 2016.

Abstract

To study the effect of seed priming in 1% NaCl or 0.3% KNO3 of some sunflower cultivars i.e. Sakha 53, Giza 102, Line S 102 and Line S 1 on critical stage of germination under salinity concentrations i.e. 0, 5, 10, 15, 20, 25, 30, 35 dSm-1 NaCl. Germination characters i.e. final germination percentage, germination rate, germination index, energy of germination and seedling vigor index were estimated. Highest averages of final germination percentage, germination rate, germination index, energy of germination, seedling vigor index were produced from primed seed in NaCl or KNO3. Line S 102 surpassed other studied cultivars in final germination percentage, germination rate and germination index, energy of germination and seedling vigor index. Increasing salinity levels from 0 to 5, 10, 15, 20, 25, 30, 35 dSm-1 NaCl significantly decreased all studied characters. Final germination percentage, germination rate, germination index, energy of germination and seedling vigor index significantly affected by the interaction between seed priming and cultivars, by the interaction between cultivars and salinity concentrations and by the interaction between seed priming and salinity concentrations. Moreover, final germination percentage, germination rate, germination index, energy of germination and seedling vigor index significantly affected by the interaction among seed priming, cultivars and salinity concentrations. It could be concluded that priming Line S 102 in NaCl or KNO3 was more tolerant to salinity stress, which must be put in breeding program of sunflower for enhancing cultivars productivity under salinity conditions and to increase its cultivation in newly reclaimed soil in Egypt.

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