Journal of Radiation Research and Radiation Proces ›› 2017, Vol. 35 ›› Issue (5): 50501-050501.doi: 10.11889/j.1000-3436.2017.rrj.35.050501

• RADIATION PROTECTION • Previous Articles    

Resistance of Tillandsia usneoides to natural radioactive radon gas

GU Mintian, ZHANG Ruiwen, LI Peng, ZHENG Guiling   

  1. College of Resource and Environment, Qingdao Agricultural University, Qingdao 266000, China
  • Received:2017-06-14 Revised:2017-09-15 Online:2017-10-20 Published:2017-10-20
  • Supported by:

    Supported by National Nature Science Found (41475132)

Abstract:

Physiological changes to Tillandsia usneoides were tested after fumigation with different concentrations of radon in a standard radon chamber. The results showed that the leaf relative electrical conductivity increased at concentration of 2 000 Bq/m3, though not significantly different from that of the control group, which increased remarkably at concentration of 4 000 Bq/m3. Moreover, soluble proteins and malondialdehyde contents didn't change much with increasing radon concentrations, i.e., no significant physiological damage induced, indicating that Tillandsia usneoides was relatively strongly resistant to radon, which was probably related to the existence of foliar trichomes on the leaf surface. In addition, superoxide dismutase content increased greatly with increasing radon concentrations, suggesting scavenging system of reactive oxygen species played a role in reducing the damage of plants exposed to radon.

Key words: Tillandsia usneoides, Air pollution, Oxidative stress, Radiation

CLC Number: 

  • TL71