Plant Molecular Biology

, Volume 84, Issue 6, pp 707–718 | Cite as

Cloning and characterization of a novel dehydrin gene, SiDhn2, from Saussurea involucrata Kar. et Kir.



Saussurea involucrata Kar. et Kir. is a hardy dicotyledonous plant capable of tolerating severe abiotic stress conditions. In a previous study, we created a cDNA library to determine what factors are associated with the cold acclimation response in S. involucrata. From this, a full-length cDNA of a dehydrin-like gene (SiDhn2) was obtained by RT-PCR. The SiDhn2 gene was characterized in this study. The full-length SiDhn2 cDNA comprised 693 bp containing an open reading frame of 345 bp specifying a protein of 115 amino acids. An alignment of the deduced amino acid sequence showed that SiDhn2 shared 55 % identity with two Brassica dehydrins. Agrobacterium tumefaciens was used to transform RD29A:SiDhn2 and 35S:SiDhn2 constructs into tobacco to investigate the germination and resistance to freezing and drought stress of transgenic plants. The RD29A:SiDhn2 transgenic plants showed greater resistance to freezing and drought stress than 35S:SiDhn2 transgenic plants or the wild-type. This study demonstrates that SiDhn2 confers cold hardiness and drought resistance, and may be a candidate resistance gene for genetic improvement of crops to increase stress resistance.


Saussurea involucrata Kar. et Kir. SiDhn2 gene Cold resistance Drought resistance Tobacco plants 



This paper resulted from the National Natural Sciences Foundation of China support program (no.31160049), (no. 31301058) and The specialized research fund for the doctoral program of higher education (20130072120025), Tongji University Young Talents Program (no. 1500219048).

Conflict of interest

The authors declare that they have no conflict of interest.

Supplementary material

11103_2013_164_MOESM1_ESM.pdf (186 kb)
Supplementary material 1 (PDF 186 kb)


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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  1. 1.Laboratory of Agricultural BiotechnologyCollege of Life Science of Shihezi UniversityShiheziChina
  2. 2.Stem Cell Research Center, Department of Regenerative MedicineTongji University School of MedicineShanghaiChina

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