Comparative transcriptome and hormone analyses of roots in apple among three rootstocks with different rooting abilities

文献类型： 外文期刊

第一作者： Li, Zhongyong

作者： Li, Zhongyong;Cao, Yang;Zhu, Jie;Liu, Jin;Li, Feng;Zhou, Shasha;Zhang, Xueying;Xu, Jizhong;Liang, Bowen;Zhu, Jie

作者机构：

关键词： Copyright; Keywords Apple; Hormone; Rootstock; Root architecture; Transcriptome

期刊名称：PEERJ （ 影响因子：2.4； 五年影响因子：2.7 ）

ISSN： 2167-8359

年卷期： 2024 年 12 卷

页码：

收录情况： SCI

摘要： Background. Root plays an important role in the growth and development of fruit trees; however, the molecular mechanisms behind the differences among rootstock varie-ties remain unclear. Methods. This study examined the effects of different rootstocks on root structure and the endogenous hormone content of 1-year old apple seedlings in combinations of Tianhong 2 (T2)/Malus robusta (HT), T2/G935, and T2/Jizhen 2 (J2). Results. The results showed that the T2/HT treatment had greater root length, surface area, volume, average diameter, tips and forks, followed by G935 and J2. In T2/HT leaves and roots, the indole-3-acetic acid (IAA) and gibberellins (GA3) levels were highest, and the abscisic acid (ABA) levels were the lowest. A root transcriptome analysis detected 10,064, 10,511, and 8,719 differentially expressed genes in T2/HT vs. T2/G935, T2/HT vs. T2/J2, and T2/J2 vs. T2/G935, respectively. The analysis of Gene Ontology (GO) terms indicated a significant enrichment in biological processes, cellular components, and molecular functions. Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis showed that plant hormone signaling, MAPK signaling pathway-plant, and plant- pathogen interaction played important roles in differences in the rooting ability of different rootstocks. In addition, some key differential genes were associated with root growth and development and were involved in these metabolic pathways. This study is important for enriching theoretical studies of fruit tree roots.

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