Biotechnology Bulletin ›› 2015, Vol. 31 ›› Issue (5): 100-105.doi: 10.13560/j.cnki.biotech.bull.1985.2015.05.016

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Ectopic-overexpression of AmHsa32 from Ammopiptanthus mongolicus Promoted Heat Tolerance in Nicotiana benthamiana

He Qian, Wang Yanping, Chen Yuzhen, Lu Cunfu   

  1. (College of Biological Sciences and Biotechnology,National Engineering Laboratory for Tree Breeding,Beijing Forestry University,Beijing 100083)
  • Received:2014-11-09 Online:2015-05-18 Published:2015-05-18

Abstract: Hsa32 is a novel heat-shock protein(Hsp)and mainly found in land plants and essential for acquired thermo-tolerance. AmHsa32 as one orthologue of the Hsa32 gene, was isolated from a desert plant, Ammopiptanthus mongolicus(Leguminosae). In order to verify the function of AmHsa32, we constructed the plant expression vector Pcambia2300-35S-AmHsa32-OCS, and transferred it into Nicotiana benthamiana through the medium of Agrobacterium strain. PCR and Western blotting demonstrated that AmHsa32 had been integrated into the genome of Nicotiana benthamiana. Seed germination and seedling growth analysis indicated that overexpressing AmHsa32 resulted in enhanced tolerance to heat stresse in transgenic Nicotiana benthamiana. Our work suggests that AmHsa32 might be a valuable gene for plant resistant breeding with transgene technology.

Key words: Ammopiptanthus mongolicus, AmHsa32, transgene, thermotolerance