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[SANET-MG] food irradiation improves gm rice



Title: Effect of gamma irradiation on nutritional components and Cry1Ab
protein in the transgenic rice with a synthetic cry1Ab gene from
Bacillus thuringiensis
Author(s): D. Wu1; Q. Ye ; Z. Wang ; Y. Xia
Source: Radiation Physics and Chemistry      Volume: 69 Number: 1 Page:
79 -- 83
DOI: 10.1016/S0969-806X(03)00346-3

Abstract:
The effects of gamma irradiation on the transgenic rice containing a
synthetic cry1Ab gene from Bacillus thuringiensis were investigated.
There was almost no difference in the content of the major nutritional
components, i.e. crude protein, crude lipid, eight essential amino acids
and total ash between the irradiated grains and the non-irradiated
transgenic rice. However, the amounts of Cry1Ab protein and apparent
amylose in the irradiated transgenic rice were reduced significantly by
the doses higher than 200Gy. In vivo observation showed that Cry1Ab
protein contents also decreased in the fresh leaf tissues of survival
seedlings after irradiation with 200Gy or higher doses and showed
inhibition of seedling growth. The results indicate that gamma
irradiation might improve the quality of transgenic rice due to removal
of the toxic Cry1Ab protein.

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