›› 2019, Vol. 31 ›› Issue (1): 80-85.DOI: 10.3969/j.issn.1004-1524.2019.01.11

• Horticultural Science • Previous Articles     Next Articles

Cloning and expression analysis of β-carotene hydroxylase gene from kale (Brassica oleracea L. var. acephala)

WANG Yushu1, WANG Huan2, GUO Yu1, ZHOU Minghui1, CHEN Lu1, CHEN Yang1   

  1. 1.Key Laboratory of Resistance Gene Engineering and Preservation of Biodiversity in Cold Areas, College of Life Sciences, Agriculture and Forestry, Qiqihar University, Qiqihar 161006, China;
    2. College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, China
  • Received:2018-04-03 Online:2019-01-25 Published:2019-04-09

Abstract: The β-carotene hydroxylase gene from kale (Brassica oleracea L. var. acephala) was cloned by homology-based cloning and RT-PCR strategies, named as BoBCH(GenBank accession number: MH016242). Sequence analysis showed that the full-length of BoBCH cDNA was 906 bp, which encoded a protein with 301 amino acids, an estimated molecular weight was 33.8 ku and an isoelectric point was 9.67. The results of conservative structural domain analysis showed that BoBCH belonged to the FA_hydroxylase protein superfamily. Phylogenetic tree analysis revealed that the kale had the closest evolutionary relationship with Brassica oleracea. Subcellular localization analysis of TMHMM and Wolf-Psort showed that it might be targeted to the chloroplast with four transmembrane regions. The qRT-PCR test results indicated that the highest was leaf, the next was stem, and the lowest level was in root; in the different periods of leaves, the expression level in the ornamental period was high, and the expression level was lower in seedling stage and rosette stage.

Key words: kale, β-carotene hydroxylase gene, cloning, expression analysis

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