Identification of MdGRF genes and the necessary role of MdGRF02 in apple root growth regulation

文献类型： 外文期刊

第一作者： Xu, Ruirui

作者： Xu, Ruirui;Xu, Yang;Xu, Ruirui;Gao, Minggang;Li, Ming;Xu, Ruirui;Whitham, Steven-A;Zhang, Shizhong

作者机构：

关键词： Bioinformatics analysis; Expression pattern analysis; MdGRFs; MdGRF02; Root growth

期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：4.342； 五年影响因子：4.342 ）

ISSN： 0304-4238

年卷期： 2022 年 295 卷

页码：

收录情况： SCI

摘要： Growth-regulating factors (GRFs) as plant-specific transcription factors exert an important role in plant growth and development; however, the function of GRFs has not been reported in apple (Malus domestica). In the present study, we identified 12 MdGRF genes, which located on six chromosomes with different densities. These MdGRFs were phylogenetically classified into four clusters based on the protein sequence similarity, and the intron-exon structure and functional domain of MdGRF genes were similar within each cluster. Interestingly, these MdGRFs were tissue-specific expressed, and several specific MdGRFs were strongly responsive to various hormonal treatments, either positively or negatively. The transgenic apple calli overexpressing MdGRF02 displayed higher fresh weight and the transgenic apple roots exhibited increased root elongation, indicating that MdGRF02 may be related with root growth regulation in apples. This study reports the identification and expression analysis of the MdGRFs and provides some useful information to reveal the potential roles of MdGRFs in apple growth regulation, especially the root growth.

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