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植物研究 ›› 2017, Vol. 37 ›› Issue (5): 744-750.doi: 10.7525/j.issn.1673-5102.2017.05.015

• 研究报告 • 上一篇    下一篇

外源GA3对毛竹实生苗茎秆生长及CesA基因表达的影响

姜勇1,2, 胡尚连1,2, 曹颖1,2, 卢学琴1,2, 黄艳1,2, 徐刚1,2   

  1. 1. 西南科技大学生命科学与工程学院植物细胞工程实验室, 绵阳 621010;
    2. 四川省生物质资源利用与改性工程技术研究中心, 绵阳 621010
  • 收稿日期:2017-02-21 出版日期:2017-09-15 发布日期:2017-09-15
  • 通讯作者: 胡尚连,E-mail:hushanglian@126.com E-mail:hushanglian@126.com
  • 作者简介:姜勇(1991-),男,硕士研究生,从事植物遗传与品种改良研究。
  • 基金资助:
    国家自然科学基金(31400257,31400333);四川省"十三五"重点公关项目(2016NYZ0038);四川省生物质资源利用与改性工程技术研究中心基金(12zxsk07,13zxsk01);西南科技大学研究生创新基金(16ycx068)

Effects of Exogenous GA3 on the Growth of Stem and CesA Gene Expression in Phyllostachys edulis Seedling

JIANG Yong1,2, HU Shang-Lian1,2, CAO Ying1,2, LU Xue-Qin1,2, HUANG Yan1,2, XU Gang1,2   

  1. 1. Lab of Plant Cell Engineering, School of life science and Engineering, Southwest University of Science and Technology, Mianyang 621010;
    2. Engineering Research Center for Biomass Resource Utilization and Modification of Sichuan Province, Mianyang 621010
  • Received:2017-02-21 Online:2017-09-15 Published:2017-09-15
  • Supported by:
    National Natural Science Foundation of China(31400257,31400333);Breeding Program Fund project by the 13th Five-year plan of Sichuan province(2016NYZ0038);Fund of Engineering Research Center for Biomass Resource Utilization and Modification of Sichuan province(12zxsk07,13zxsk01);Graduate innovation fund of Southwest University of Science and Technology(16ycx068)

摘要: 以毛竹实生苗为试验材料,研究不同浓度外源GA3(0,0.1,0.5,1 μmol·L-1)对毛竹生长及CesA基因表达的影响。结果表明,与未经GA3处理相比,施用外源GA3后,毛竹实生苗茎节间和纤维细胞显著伸长,初生壁纤维素合成相关基因PeCesA2和PeCesA6相对表达量明显上调,次生壁相关基因PeCESA4和PeCESA4-1显著下调,傅里叶红外光谱分析(FTIR),发现毛竹茎秆纤维素特征峰强度(1 060,1 160及1 373 cm-1)随着GA3浓度升高而逐渐增强,表明施用外源GA3能够影响毛竹茎秆CesA基因表达,PeCesA2和PeCesA6的表达与外源GA3促进纤维细胞伸长的过程存在一定联系。

关键词: 毛竹实生苗, GA3, 纤维细胞, CesA基因

Abstract: We studied the growth of stem and CesA gene expression from the seedling in Phyllostachys edulis under the different concentration of exogenous GA3(0, 0.1, 0.5, 1 μmol·L-1). Compared with without GA3 treatment, the internode and fiber cells of stem from the seedling elongated significantly, after treated by exogenous GA3. The relative expression of primary wall-related PeCesA2 and PeCesA6 genes were significantly up-regulated, while that of secondary wall-related PeCesA4 and PeCesA4-1 genes were significantly down-regulated. By Fourier transform infrared spectroscopy(FTIR), the absorption intensity of characteristic cellulose peak(1 060, 1 160 and 1 373 cm-1) from the stems enhanced with the increase of GA3 concentration. Signifying the expression of CesA gene could be affected by the exogenous GA3. The expression of PeCesA2 and PeCesA6 genes could be related to the process of fiber cells elongation.

Key words: Phyllostachys edulis seedling, GA3, fiber cell, CesA gene

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