Effect of Nano-TiO2 on Strength of Naturally Aged Seeds and Growth of Spinach

Authors: Zheng, Lei; Hong, Fashui; Lu, Shipeng; Liu, Chao

Source: Biological Trace Element Research, Volume 104, Number 1, April 2005 , pp. 83-92(10)

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Abstract:

The effects of nano-TiO2 (rutile) and non-nano-TiO2 on the germination and growth of naturally aged spinach seeds were studied by measuring the germination rate and the germination and vigor indexes of aged spinach seeds. An increase of these factors was observed at 0.25–4 permil

nano-TiO2 treatment. During the growth stage, the plant dry weight was increased, as was the chlorophyll formation, the ribulosebisphosphate carboxylase/oxygenase activity, and the photosynthetic rate. The best results were found at 2.5 permil

nano-TiO2. The effects of non-nano-TiO2 are not significant. It is shown that the physiological effects are related to the nanometer-size particles, but the mechanism by which nano-TiO2 improves the growth of spinach seeds still needs further study.

Keywords: Nano-TiO2; spinach; aged seed; seed vigor; photo synthesis

Document Type: Miscellaneous

Publication date: 2005-04-01