A full-length cDNA encoding a dehydrin was cloned from the living fossil plant Ginkgo biloba by rapid amplification of cDNA ends (RACE). The cDNA, designated as GbDHN, was 813 bp long containing an open reading frame of 489 bp. The deduced GbDHN protein had 163 amino acid residues, which formed a 17 kDa polypeptide with a predicted isoelectric point (pI) of 5.75. GbDHN had an S-segment and a K-segment, indicative of dehydrins, but no Y-segments. Homology analysis indicated that the S-segment and K-segment of GbDHN shared identity with those of other reported dehydrins, indicating that GbDHN belonged to dehydrin superfamily. Genomic sequence of GbDHN was also cloned using genomic walker technology. By comparing genomic DNA with the cDNA, it was found that there was a 257-bp intron in this gene. Promoter analysis indicated that it contained six CAAT boxes, one TATA box, one ABRE box and one GC-motif in the 5′-flanking region. Southern blot analysis revealed that GbDHN belonged to a single copy gene family. RT-PCR analysis revealed that GbDHN constitutively expressed in stems and roots. The increased expression of GbDHN was detected when G. biloba seedlings were treated with exogenous abscisic acid (ABA), salt stress and drought stress. These results indicate that the GbDHN has the potential to play a role in response to ABA and environmental stresses that can cause plant dehydration.
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Review Article|
August 18 2006
Molecular Cloning and Characterization of a Novel Dehydrin Gene from Ginkgo biloba
Zhongxiang Deng;
Zhongxiang Deng
1State Key Laboratory of Genetic Engineering, School of Life Sciences, Morgan-Tan International Center for Life Sciences, Fudan-SJTU-Nottingham Plant Biotechnology R&D Center, Fudan University, Shanghai, 200433, China
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Yiding Wang;
Yiding Wang
1State Key Laboratory of Genetic Engineering, School of Life Sciences, Morgan-Tan International Center for Life Sciences, Fudan-SJTU-Nottingham Plant Biotechnology R&D Center, Fudan University, Shanghai, 200433, China
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Keji Jiang;
Keji Jiang
1State Key Laboratory of Genetic Engineering, School of Life Sciences, Morgan-Tan International Center for Life Sciences, Fudan-SJTU-Nottingham Plant Biotechnology R&D Center, Fudan University, Shanghai, 200433, China
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Xuefen Liu;
Xuefen Liu
1State Key Laboratory of Genetic Engineering, School of Life Sciences, Morgan-Tan International Center for Life Sciences, Fudan-SJTU-Nottingham Plant Biotechnology R&D Center, Fudan University, Shanghai, 200433, China
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Weisheng Wu;
Weisheng Wu
1State Key Laboratory of Genetic Engineering, School of Life Sciences, Morgan-Tan International Center for Life Sciences, Fudan-SJTU-Nottingham Plant Biotechnology R&D Center, Fudan University, Shanghai, 200433, China
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Shi Gao;
Shi Gao
1State Key Laboratory of Genetic Engineering, School of Life Sciences, Morgan-Tan International Center for Life Sciences, Fudan-SJTU-Nottingham Plant Biotechnology R&D Center, Fudan University, Shanghai, 200433, China
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Juan Lin;
Juan Lin
1State Key Laboratory of Genetic Engineering, School of Life Sciences, Morgan-Tan International Center for Life Sciences, Fudan-SJTU-Nottingham Plant Biotechnology R&D Center, Fudan University, Shanghai, 200433, China
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Xiaofen Sun;
Xiaofen Sun
1State Key Laboratory of Genetic Engineering, School of Life Sciences, Morgan-Tan International Center for Life Sciences, Fudan-SJTU-Nottingham Plant Biotechnology R&D Center, Fudan University, Shanghai, 200433, China
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Kexuan Tang
Kexuan Tang
2Plant Biotechnology Research Center, Fudan-SJTU-Nottingham Plant Biotechnology R&D Center, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, 200030, China
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Publisher: Portland Press Ltd
Online ISSN: 1573-4935
Print ISSN: 0144-8463
© 2006 Springer Science+Business Media, Inc.
2006
Biosci Rep (2006) 26 (3): 203–215.
Citation
Zhongxiang Deng, Yiding Wang, Keji Jiang, Xuefen Liu, Weisheng Wu, Shi Gao, Juan Lin, Xiaofen Sun, Kexuan Tang; Molecular Cloning and Characterization of a Novel Dehydrin Gene from Ginkgo biloba. Biosci Rep 18 August 2006; 26 (3): 203–215. doi: https://doi.org/10.1007/s10540-006-9016-x
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