文献类型： 外文期刊

作者： Zhang, Xiao-Jun ¹ ; Gao, Yan ¹ ; Wen, Peng-Fei ¹ ; Hao, Yon-Yon ¹ ; Chen, Xue-Xiong ² ;

作者机构： 1.Shanxi Agr Univ, Coll Hort, Dept Pomol, Taigu 030801, Peoples R China

2.Shanxi Acad Agr Sci, Inst Pomol Res, Shanxi Key Lab Germplasm Improvement & Utilizat P, Taiyuan, Shanxi, Peoples R China

3.Shanxi Agr Univ, Coll Resources & Environm Sci, Dept Agr Resources Utilizat, Taigu, Peoples R China

关键词： 'Granny Smith' apple; phytoene synthase; cloning; gene expression

期刊名称：BIOTECHNOLOGY & BIOTECHNOLOGICAL EQUIPMENT （ 影响因子：1.632； 五年影响因子：2.029 ）

ISSN： 1310-2818

年卷期： 2018 年 32 卷 5 期

页码：

收录情况： SCI

摘要： Phytoene synthase (PSY) plays a key role in the biosynthesis and accumulation of carotenoids as the first rate-limiting enzyme in the plant carotenoid pathway. In the present study, the 'Granny Smith' apple PSY gene, MdPSY, was cloned using in silico cloning. The length of the MdPSY was 1500 bp, which included a complete open reading frame of 1194 bp, encoding a predicted protein of 397 amino acids. Sequence analysis revealed that the 'Granny Smith' apple PSY protein shared high homology with MdPSY2 (99%), MdPSY1 (93.9%), FaPSY (71.8%), CuPSY (70.7%) and NtPSY (69.7%). Phylogenetic analysis showed that the MdPSY protein was closely related to the PSY protein of Rosaceae. An expression profile analysis of different tissues indicated that MdPSY expression in the roots was higher than that in other tissues. MdPSY expression was tested throughout the fruit development period. The results showed that MdPSY plays a role in carotenoid biosynthesis in 'Granny Smith' apple. In addition, bagging treatment inhibits PSY gene expression, which in turn affects the synthesis and accumulation of carotenoids.