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园艺学报 ›› 2022, Vol. 49 ›› Issue (8): 1650-1662.doi: 10.16420/j.issn.0513-353x.2021-0518

• 研究论文 • 上一篇    下一篇

菠萝类纤维素合成酶CslD家族基因鉴定及AcoCslD2a功能分析

刘朝阳(), 廖志婵, 路鑫鑫, 何业华   

  1. 华南农业大学园艺学院,农业农村部华南地区园艺作物生物学与种质创制重点实验室,广州 510642
  • 收稿日期:2022-02-22 修回日期:2022-05-09 出版日期:2022-08-25 发布日期:2022-09-05
  • 作者简介:*E-mail: liuchaoyang@scau.edu.cn
  • 基金资助:
    广州市科技计划项目(202102020226);国家重点研发计划项目(2019YFD1000505);广东省重点领域研发计划项目(2018B020202011)

Identification of CslD Gene Family in Pineapple and Functional Analysis of AcoCslD2a

LIU Chaoyang(), LIAO Zhichan, LU Xinxin, HE Yehua   

  1. Key Laboratory of Biology and Germplasm Enhancement of Horticultural Crops in South China,Ministry of Agriculture and Rural Affairs,College of Horticulture,South China Agricultural University,Guangzhou 510642,China
  • Received:2022-02-22 Revised:2022-05-09 Online:2022-08-25 Published:2022-09-05

摘要:

从菠萝基因组中鉴定出8个类纤维素合成酶(cellulose synthase-like,Csl)CslD家族基因,其分布于7条染色体及1条Scaffold片段中,外显子数3 ~ 5;依据进化关系将其划分为3个亚组,其中亚组Ⅲ成员数在菠萝中有明显扩增;结合共线性及表达模式分析等预测了家族成员可能的生物学功能。克隆了AcoCslD2a基因cDNA全长序列,亚细胞定位分析表明,其编码蛋白定位于高尔基体。构建ProAtUbq10和ProAtCslD3启动子驱动的AcoCslD2a的植物表达载体,经根癌农杆菌GV3101介导转化至拟南芥atcsld3根毛缺失突变体,不同载体的转基因结果一致,表明AcoCslD2a能够完全恢复突变体根毛数量至野生型水平,可部分恢复突变体的根毛长度。

关键词: 菠萝, 类纤维素合成酶, CslD, 细胞壁, 根毛

Abstract:

In this study,eight CslD genes were characterized in pineapple genome. Chromosomal mapping showed that they were distributed on seven chromosomes and one scaffold. Three to five exons were identified in these genes. Three subgroups were divided according to the phylogenetic analysis,and the number of Group Ⅲ was significantly increased in pineapple. The potential biological functions of the pineapple CslD gene family members were further predicted,basing on the collinearity and gene expression analysis. The full length cDNA sequence of AcoCslD2a was cloned and the subcellular localization analysis indicated that its encoding protein was localized in Golgi apparatus. Two expression vector for AcoCslD2a gene,which were driven by the promoters including ProAtUbq10 and ProAtCslD3,respectively,were constructed and transformed into the Arabidopsis atcsld3 root hair deficient mutant,mediated by Agrobacterium tumefaciens GV3101. The phenotype analysis for the transgenic lines of different expression vectors both indicated that the defect root hair number phenotype of mutant could be recovered to the wild-type phenotype by AcoCslD2a,while the defect root hair length phenotype could be partially recovered.

Key words: pineapple, cellulose synthase-like, CslD, cell wall, root hair

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