%0 Journal Article
%A MAN Xiu-Ling
%A ZHANG Li-Xia
%A ZHAO Xiao-Ju
%T Effects of Exogenous NO on Seed Germination and Physiological Metabolism in Catharanthus roseus Seedling under NaCl Stress
%D 2018
%R 10.7525/j.issn.1673-5102.2018.05.005
%J Bulletin of Botanical Research
%P 669-674
%V 38
%N 5
%X Under 50 mmol·L-1 NaCl stress condition, we studied the relaxation effects of sodium nitroprusside(SNP, an exogenous nitric oxide donor) at the contents of 0.05, 0.1, 0.5, 1.0 and 2.0 mmol·L-1 on germination and physiological metabolism in Catharanthus roseus seedlings. The results showed that NaCl stress inhibited the germination of C.roseus and SNP could alleviate its stress effect. At the 0.1 mmol·L-1 of SNP the seed germination, germination and vitality index, and contents of proline in leaves were increased significantly, while malondialdehyde(MDA) content in leaves were decreased dramatically. Nitrate reductase(NR) activities in 0.1-0.5 mmol·L-1 SNP groups reached to higher levels compared to that of control group. However, more than 0.5 mmol·L-1 SNP enhanced the stress effect of NaCl. Therefore, the 0.1 mmol·L-1 was the most appropriate content for SNP to alleviate NaCl stress. In conclusion, appropriate contents of exogenous NO could alleviate NaCl stress on C.roseus seeds and seedlings effectively.
%U https://bbr.nefu.edu.cn/EN/10.7525/j.issn.1673-5102.2018.05.005