The response of spring rapeseed genotypes (Brassica napus L.) under salinity stress
Paper Details
The response of spring rapeseed genotypes (Brassica napus L.) under salinity stress
Abstract
Abiotic stresses such as salinity, are factors that severely affects agricultural production. To evaluate the effect of salt stress on some morphological and physiological traits related to salt tolerance, 22 spring type genotypes of rapeseed (Brassica napus L.) in the vegetative growth stage an experiment was conducted as a split plot form based on Randomized Complete Blocks Design using levels of salinity: zero (control), 150 and 300mM sodium chloride with three replications were done in the research greenhouse of Tabriz university. In present study, the Na+ contents of leaves and roots and electrolyte leakage were significantly increased. Also the K+ contents of leaves and roots, K+/Na+ ratios in shoot and root, shoot height and root length were measured significantly in response to salinity stress. Significant differences between genotyps in all traits except Na+ contents of root were observed. Cluster analysis led to the separation of genotypes in to four groups. Results showed identified Safi-7, Safi-3, Hyola308, SAN-17 and SAN-2 in most traits has higher means and ranked as tolerant genotypes. The genotypes Sarigol, Safi-5, Option500, SAN-3, SAN-13, Zafar, Goliath, SAN-8 and Heros in most traits has lower means and ranked as sensitive genotypes to salinity stress. So can be used this genotypes to understanding the mechanisms involved in salt tolerance and salt tolerance genes involved in this process.
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