Biotechnology Bulletin ›› 2017, Vol. 33 ›› Issue (7): 126-132.doi: 10.13560/j.cnki.biotech.bull.1985.2016-1199

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An Efficient Transformation of Salinity-resistant Peppermint Stem Mediated with Agrobacterium tumefaciens

ZHAO Zhong-juan, WEI Yan-li ,LI Ji-shun, WANG Yi-lian ,YANG He-tong   

  1. Ecology Institute of Shandong Academy of Sciences,Jinan 250014
  • Received:2017-01-07 Online:2017-07-11 Published:2017-07-11

Abstract: Transgenic technology is an important means to improve the essential yield and quality of peppermint(Mentha piperita L.)oil. An Agrobacterium tumefaciens-mediated transformation using bud peppermint stem was established,in order to solve the problems in adventitious bud induction of salinity-resistant peppermint leave,such as easy browning and difficult differentiation. The orthogonal test was carried out to screen the optimal concentration of A. tumefaciens,transformation time and co-culture time. The results showed that the effect of the three factors on transformation displayed as the transformation time(B)> bacterial concentration(A)> co-culture time(C). The bacterial concentration OD600 = 0.8,the transformation time 15 min and the co-culture time 3 d proved to be the optimal transformation conditions. The optimal composition of transformants was screened to be 1/5MS + 0.5 g/L MES(2-(N-morpholino)ethanesulfonic acid)+ 1% glucose + 2% sucrose and PH 5.4. The transformation was conducted using different plant expression vectors,and the positive plants were detected by genomic PCR and GUS staining. And the results revealed that this transformation system was suitable for the transformation of many plant expression vectors,and the regenerated plants were easily obtained. This provides a new method and system for gene transformation of salinity-resistant peppermint.

Key words: peppermint, stem, Agrobacterium tumefaciens, plant expression vector, genomic PCR, GUS staining