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Studies on oxygen transportation of roots in anaerobic media with polarography

Wu Zhenbin, He Feng, Cheng Wangyuan, Cheng Shuiping, Darwent M J, Armstrong B, Armstrong J

State Key Laboratory of Freshwater Ecology and Biotechnology,Institute of Hydrobiology,Chinese Academy of Sciences.Wuhan 430072,Hubei；China；College of Life Sciences,University of Hull.UK

Abstract

The result indicated that the apical regions (about 0-5 mm from the tip) have the highest ODR and the most active oxidising activities. ODR decreased from the apical region to the base roots, near the base, ODR was almost negligible. For the same species, oxygen diffusion rate of new roots was higher than that of old olnes. For the roots of different species of the same length, ODR of Typha angustifolia Linn. was the highest, Eichhornia crassipes Solm. was the lowest.

Key words: Polarography;Anaerobic media;Oxygen diffusion rate (ODR)

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Citing This Article：

Wu Zhenbin, He Feng, Cheng Wangyuan, Cheng Shuiping, Darwent M J, Armstrong B, Armstrong J. Studies on oxygen transportation of roots in anaerobic media with polarography. Acta Physiol Sin 2000; 52 (3): (in Chinese with English abstract).