بررسي اثرات تنش شوري بر جوانه زني و رشد گياهچه ارقام جديد و پرمحصول كلزاي پاييزه

Study on the effects of salt stress in germination and embryo growth stages of the four prolific and new cultivars of winter rapeseed (Brassica napus L.)

Due to evaluation of tolerance to the salt stress of the four new and prolific varieties of winter rapeseed (Brassica napus L.)Cocktail, Parade, Okapi and the hybrid of Regent x Cobra in germination and embryo growth stages, a factorial experiment was carried out using Randomized Complete Block Design with three replicates in crop physiology laboratory of faculty of Agriculture of Urmia University. In this research some characters as percent of germination, germination rate, gemule length, radicle length, gemule weight and radicle weight were studied. Salt treatment were control 0, 4, 8, 10 and 12 mmoshlcm. The results of data analysis showed salt effect on studied cultivars and interaction of cultivar x salt on the studied characters were significant in I% level. With increasing of salt all evaluated characters decreased. The Regent x Cobra was superior cultivar in all attributes unless germination percentage, and Okapi was lower from other cultivars. study on the interaction of salinity and cultivar effects indicated germination percentage of Cocktail variety was higher from others until dose of 10 mmohs/cm but in salinity of 12 mmohs/cm the Parade cultivar was superior from other cultivars. The salt had a negative correlation with all evaluated characters. The most negative correlation was between salt and percent of germination and the most positive correlation was between percent of germination and germination rate characters and there was a positive correlation between percent of germination with gemule length.