
	Asian Journal of Plant Sciences
	Year: 2006 \| Volume: 5 \| Issue: 6 \| Page No.: 932-939 DOI: 10.3923/ajps.2006.932.939

Transgenic Tobacco Plants Over-expressing Arabidopsis Transcriptional Factor CBF1 Show Morphological and Biochemical Characteristics Associated with Cold Tolerance

Shanjun Wei , Zhenyuan Sun , Lei Han and Longjiang Yu

Abstract: Transcriptional factor CBFs (C-repeat/dehydration responsive element binding factors) play important roles in plants` adaptation to low temperature and are prospective to be used in the engineering of cold-tolerant crops. Arabidopsis CBF1 was expressed in tobacco plants in the present study to investigate the effects of CBF1 on growth performance and cold tolerance in cold sensitive plants. Tobacco plants over expressing CBF1 had shorter stature, thicker stems, thicker and glossier leaves, higher chlorophyll content, weaker apical dominance and longer time to flowering than control tobacco plants. Over expression of Arabidopsis CBF1 in tobacco plants dose-dependently promoted surviving low temperature by increasing photochemical efficiency (Fv/Fm), soluble sugar content and proline content and decreasing malondiadehyde (MDA) content under low temperature stress. These results indicated that Over expression of CBF1 could conferred elevated tolerance to low temperature upon cold sensitive plants.

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How to cite this article:

Shanjun Wei , Zhenyuan Sun , Lei Han and Longjiang Yu , 2006. Transgenic Tobacco Plants Over-expressing Arabidopsis Transcriptional Factor CBF1 Show Morphological and Biochemical Characteristics Associated with Cold Tolerance. Asian Journal of Plant Sciences, 5: 932-939.

DOI: 10.3923/ajps.2006.932.939

URL: https://scialert.net/abstract/?doi=ajps.2006.932.939

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