Long-Term Gamma Radiation Effect on Functional Traits of Tradescantia Flumnensis L.
Fei Li 1,2
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Applied Nuclear Techniques in Geosciences Key Laboratory of Sichuan, Chengdu University of Technology, Chengdu 610059, China
College of Nuclear Technology and Automation Engineering, Chengdu University of Technology, Chengdu 610059, China
Minzu University of China, Beijing 100083, China
Submission date: 2021-04-01
Final revision date: 2021-05-28
Acceptance date: 2021-09-10
Online publication date: 2022-01-18
Publication date: 2022-02-16
Pol. J. Environ. Stud. 2022;31(2):1153–1160
The effect of radioactivity on the environment, especially on plants, has always been one of the vital researches of radio-ecology. However, long-term irradiated ecosystems are very rare. Occasionally, one special miniature ecological environment object consisted of thorium mineral (Th-232) and Tradescantia flumnensis L. over 10 years is carried out to evaluate the effect of long-term low-radioactivity gamma radiation on herbaceous plant. Several functional features of Tradescantia flumnensis L. are selected and measured with physical measurement (PM), HPGe portable gamma-ray spectrometer (HPGe PGS), wavelength dispersion X-ray fluorescence (WDXRF), and advantage isotope ratio mass spectrometer (AIR-MS). The results show that functional traits varied with the increasing of radiation dose rate. These results also indicate that the plants can adapt to low-intensity gamma radiation (<332.6 nGy•h-1) through adjustment of physical properties. In addition, low-intensity gamma radiation has positive influence on plant’s water use efficiency, growth and nutrition acquisition of roots. Restrictions on plant phosphorus demand have also been eased. However, high-intensity gamma radiation (>528.7 nGy•h-1) has exceeded the tolerance of plants, making most functional traits unhealthy or abnormal. This rare case is of great reference significance of setting biological indicators of long-term radiation system.