ACTA AGRICULTURAE BOREALI-SINICA ›› 2020, Vol. 35 ›› Issue (4): 87-95. doi: 10.7668/hbnxb.20190867

Special Issue: Biotechnology

• Crop Genetics·Germplasm Resources·Biotechnology • Previous Articles     Next Articles

Expression Analysis of Lignin Biosynthesis Genes of Pennisetum purpureum Leaf and Stem

FU Chengcheng, HUANG Huaian, ZHOU Mengdie, ZHONG Tianxiu, ZHANG Xiangqian, CHEN Shu, XIE Xinming   

  1. College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, China
  • Received:2020-05-09 Published:2020-08-28

Abstract: In order to systematically study the expression changes of lignin biosynthesis genes in the stems and leaves of elephant grass,the lignin content and lignin biosynthesis gene expressions were determined in the first,third and fifth stem internodes,as well as the top first,third,fifth,seventh and ninth leaf of N51 elephant grass. The contents of lignin in stem internodes and leaves increased from the head to the base of the mature elephant grass. Real-time quantitative PCR analysis showed that the expression of different lignin biosynthesis genes was tissue-specific. The expression of COMT, C3H and HCT4 genes in leaf tissue was significantly lower than that in stem tissues. For example, COMT had the highest expression level in the fifth internode,which was about 6 times that in leaves. The 4CL and F5H gene expressions were significantly higher than those in the stem tissues. For example, 4CL had the highest expression level in the ninth leaf,which was about 14 times the expression level of the first internode. Correlation analysis showed that the lignin content in stems was positively correlated with the expression of F5H, HCT4 and CCoAOMT genes,and negatively correlated with the expression of C3H gene,while the lignin content in leaves was positively correlated with the expression of 4CL gene,and negatively correlated with the expression of C4H, COMT, HCT4 and CCR genes. This result indicated that different lignin synthetases showed obvious expression differences in different tissues,and the main lignin synthesized was also different in different tissues.

Key words: Elephant grass, Lignin biosynthesis, Lignol, Real-time fluorescence quantitative PCR, Gene expression

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Cite this article

FU Chengcheng, HUANG Huaian, ZHOU Mengdie, ZHONG Tianxiu, ZHANG Xiangqian, CHEN Shu, XIE Xinming. Expression Analysis of Lignin Biosynthesis Genes of Pennisetum purpureum Leaf and Stem[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2020, 35(4): 87-95. doi: 10.7668/hbnxb.20190867.

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