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Updated: Aug 17, 2026

Repeatable Stair-step Assay to Access the Allelopathic Potential of Weedy Rice (Oryza sativa ssp.)
Published on: January 28, 2020
[Eco-toxicological effects of selenium and its critical value on Oryza sativa]
Kuangfei Lin1, Xiaoqing Xu, Xia Jin
1Research Center of Risk Assessment and Management on Hazardous Chemicals, East China University of Science and Technology, Shanghai 200237, China. kflin@ecust.edu.cn
Abstract:
In a pot experiment with brown-yellow soil, this paper studied the effects of different concentration selenium on the growth and activated oxygen- scavenging system of Oryza sativa. The results showed that low concentration Se (< 8 mg x kg(-1)) had a promoting effect on the wheat biomass, chlorophyll a, chlorophyll a/b, and activated oxygen- scavenging system, while high concentration Se (> 16 mg x kg(-1)) was in adverse. Soil Se concentration had a significant correlation with root biomass, shoot biomass, chlorophyll a/b, MDA, SOD, CAT, POD. It was defined by the pot experiment that 10% inhibition rate of root or shoot biomass could be regarded as critical value, and the critical content of soil Se was estimated to be 21 mg x kg(-1).
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