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Bulletin of Botanical Research ›› 2020, Vol. 40 ›› Issue (6): 897-905.doi: 10.7525/j.issn.1673-5102.2020.06.012

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Leaf Color and Growth Variation of Transgenic Gold Leaf Poplar

Yi-Di LI, Chen-Rui GU, Hui-Xin GANG, Gui-Feng LIU, Su CHEN, Jing JIANG()   

  1. State Key Laboratory of Tree Genetics and Breeding,Northeast Forestry University,Harbin 150040
  • Received:2020-02-28 Online:2020-11-20 Published:2020-11-04
  • Contact: Jing JIANG E-mail:jiangjing1960@126.com
  • About author:LI Yi-Di(1995—),female,master,main research directions:tree breeding.
  • Supported by:
    Project demonstration and promotion of precious tree species and high-quality breeding techniques in Northeast China(GA19B201)


The chlorophyll content of the PaGLK gene Populus alba×P.berolinensis inhibited expression line was significantly reduced, and the leaves showed yellow(named golden leaf silver poplar). Using PaGLK transgenic Populus alba×P.berolinensis, its leaf color parameters and chlorophyll content were measured in time series, and its growth characteristics were analyzed. The results showed that PaGLK transgenic Populus alba×P.berolinensis changed the leaf color, and the chlorophyll content of the expressing lines was significantly lower than that of WT(P<0.05), and the leaf brightness was significantly higher than that of WT(P<0.05). During the growth and development period, the leaves showed dark yellow green. The daily growth height(GD) of seedling height in the Y2 fast-growing stage of the expressing lines was higher than that of the control lines, and the plant height at the seedling stage was not affected. The over-expressing transgenic Populus alba×P.berolinensis plants were significantly lower than the control plants in that year(P<0.05), and the average daily growth height(GD) of the seedling height in the fast-growing period was also 22.19% of that of the control plants. PaGLK inhibited expression strains have potential application value in urban landscaping.

Key words: Populus alba×P. berolinensis, PaGLK, chlorophyll content, growth characteristics

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