Journal of Tropical Oceanography ›› 2022, Vol. 41 ›› Issue (6): 20-27.doi: 10.11978/2021184CSTR: 32234.14.2021184

• Special Column: Mangrove Forest • Previous Articles     Next Articles

Cloning and expression analysis of Cinnamate-4-hydroxylase gene from Rhizophora stylosa

XIE Yong1,2,3,4(), WANG Youshao1,2,3,5(), ZHANG Weishi6   

  1. 1. State Key Laboratory of Tropical Oceanography (South China Sea Institute of Oceanology, Chinese Academy of Sciences), Guangzhou 510301, China
    2. Daya Bay Marine Biology Research Station, Chinese Academy of Sciences, Shenzhen 518121, China
    3. Innovation Academy of South China Sea Ecology and Environmental Engineering, Chinese Academy of Sciences, Guangzhou 510301, China
    4. University of Chinese Academy of Sciences, Beijing 100049, China
    5. Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, China
    6. Linyi Baishabu Middle School, Linyi 276035, China
  • Received:2021-12-29 Revised:2022-03-31 Online:2022-11-10 Published:2022-04-14
  • Contact: WANG Youshao E-mail:xieyong199605@163.com;yswang@scsio.ac.cn
  • Supported by:
    National Key Research and Development Program of China(2017FY100700);National Natural Science Foundation of China(U1901211);National Natural Science Foundation of China(41876126);International Partnership Program of Chinese Academy of Sciences(133244KYSB20180012);Strategic Priority Research Program of the Chinese Academy of Sciences(XDA23050200);Strategic Priority Research Program of the Chinese Academy of Sciences(XDA19060201);Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)(GML2019ZD0305)

Abstract:

Cinnamate-4-hydroxylase is a key enzyme in lignin synthesis which plays an important role in plant tolerance to heavy metal stress. In this study, a cinnamate-4-hydroxylase gene named RsC4H was cloned from the leaves of Rhizophora stylosa by homologous cloning and rapid amplification of cDNA ends (RACE). Bioinformatics analysis showed that the full length of RsC4H gene cDNA was 2006bp, the length of open reading frame was 1572bp, and encoded 523 amino acids. The relative molecular weight of the encoded protein is 60.18kD. It is a hydrophilic unstable protein with secondary structure alpha-helix (47.42%) and random coil (32.70%), this protein contains a transmembrane structure at the N-terminal and C-terminal, respectively, and does not contain signal peptides. It is mainly distributed on the membrane structure or endoplasmic reticulum to function, and belongs to P450 superfamily. RsC4H protein has high similarity with C4H protein of other plants. The phylogenetic tree results showed that it was closer to Cucurbita maxima (xp_023007159.1) and Cucurbita moschata (xp_022947682.1). qRT-PCR results showed that Rhizophora stylosa could quickly respond to heavy metal stress, improve the expression of RsC4H gene, promote lignin production, increase cell wall thickness and prevent metal ions from entering cells. The results enrich the gene pool of mangrove plants resistant to heavy metal stress, and lay a foundation for revealing the mechanism of heavy metal stress tolerance of mangrove at the molecular level.

Key words: Rhizophora stylosa, cinnamate-4-hydroxylase, gene cloning, bioinformatics analysis

CLC Number: 

  • Q943.2