Welcome to Bulletin of Botanical Research! Today is Share:

Bulletin of Botanical Research ›› 2011, Vol. 31 ›› Issue (1): 34-39.doi: 10.7525/j.issn.1673-5102.2011.01.007

Previous Articles     Next Articles

Effects of Exogenous Nitric Oxide on Seed Germination and Physiological Characteristics of Wheat Seedlings under Lead Stress

WEI Xue-Ling;SHI Ru-Xia;JIA Ling-Yun;LIU Yan;ZHANG Hui;JIANG Yu;YANG Ying-Li*   

  1. College of Life Science,Northwest Normal University,Lanzhou 730070
  • Received:1900-01-01 Revised:1900-01-01 Online:2011-01-20 Published:2011-01-20
  • Contact: YANG Ying-Li

Abstract: By the method of solution culture, wheat was used to investigate the effects of exogenous NO donor SNP on seed germination and seedlings physiological characteristics under Pb2+ stress. The results showed that Pb2+ treatment resulted in significant decreases in seed germination and seedling growth of wheat,and notable reduction in the levels of chlorophyll a, chlorophyll b and chlorophyll fluorescence, 25 μmol·L-1 SNP could alleviate the inhibition of Pb2+ on these indexes. No significant changes in the activities of CAT and POD were observed in comparison with the control under Pb2+ stress. However, the application of SNP induced increases of CAT activity and soluble protein content in wheat seedlings under Pb2+ treatment. Therefore, exogenous NO could alleviate the poison of Pb2+ and enhance the adaptation of wheat seedlings to Pb2+ stress.

Key words: Pb2+ stress, seed germination, chlorophyll, soluble protein, wheat

CLC Number: