文献类型: 外文期刊
作者: Han, XL; Zhang, CX; Tian, Y; Gul, H; Cong, PH; Zhang, LY
作者机构:
关键词: apple; anthocyanin; glutathione S-transferase; transport
期刊名称: CANADIAN JOURNAL OF PLANT SCIENCE
ISSN: 0008-4220
年卷期: 2018 年 98 卷 5 期
页码:
收录情况: JCR(2021版)
摘要: Glutathione S-transferase (GST) is involved in the downstream steps of the anthocyanin biosynthesis pathway in plants. However, the gene(s) encoding this enzyme have not been isolated from apple (Malus x domestica Borkh.) yet. We isolated a gene encoding GST from leaves of the red-fleshed apple variety 'Royalty' by full cDNA library sequencing and the 3' rapid-amplification of cDNA ends method, and designated it MdGST1. In total, seven different MdGST1 transcripts were found. These had three different untranslated but identical protein-coding regions. Phylogenetic analysis showed that MdGST1 is a TT19-type GST, which is involved in anthocyanin transport. qRT-PCR analyses showed that the transcript level of MdGST1 was much higher in red leaves than in bagged or green leaves. When MdGST1 was introduced into a non-pigmented mutant of Arabidopsis, the transformants showed a visible purple phenotype in leaves and stems. Our results suggest that MdGST1 plays a role in anthocyanin biosynthesis. This information will help to improve the understanding of the mechanism of apple coloration.
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