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梨中KNOX转录因子的全基因组分析及矮化相关基因的表达模式

Genome-Wide Analysis of KNOX Transcription Factors and Expression Pattern of Dwarf-Related Genes in Pear.

作者信息

Liu Jianlong, Zhang Chenxiao, Han Jingyue, Fang Xiaoyun, Xu Hongpeng, Liang Chenglin, Li Dingli, Yang Yingjie, Cui Zhenhua, Wang Ran, Song Jiankun

机构信息

College of Horticulture, Qingdao Agricultural University, Qingdao, China.

Haidu College, Qingdao Agricultural University, Laiyang, China.

出版信息

Front Plant Sci. 2022 Jan 28;13:806765. doi: 10.3389/fpls.2022.806765. eCollection 2022.

DOI:10.3389/fpls.2022.806765
PMID:35154223
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8831332/
Abstract

KNOTTED1-like homeobox (KNOX) transcription factors (TFs) belonging to the homeobox TF family play important roles in plant growth, development, and responses to abiotic and biotic stress. However, little information is available on KNOX TF in pear (). In this study, 19 PbKNOXs TFs were re-identified in pear ( Rehd.). Phylogenetic analysis revealed that the TFs were clustered into three groups with 10 conserved motifs, some of which were group- or subgroup-specific, implying that they are important for the functions of the KNOX in these clades. and are (encodes a MEINOX domain but not a homeodomain) genes identified in pear for the first time. genes in and were closely related, and a collinear relationship among genes in and was observed. Analysis of the expression patterns of genes in different tissues, at various growth stages, and in response to abiotic and biotic stress revealed that are involved in plant growth and development. Our comparative transcriptional analysis of dwarf mutant varieties revealed that genes belonging to class I are highly expressed compared with genes in other classes. Analysis of the expression of genes in the hybrid offspring of vigorous and dwarf varieties revealed that genes were highly expressed in the vigorous offspring and weakly expressed in the dwarf offspring. These findings provide new insight into the function of KNOX TFs in pear and will aid future studies of dwarf fruit trees.

摘要

属于同源异型框转录因子家族的KNOTTED1类同源异型框（KNOX）转录因子在植物生长、发育以及对非生物和生物胁迫的响应中发挥着重要作用。然而，关于梨中KNOX转录因子的信息却很少。在本研究中，在梨（Rehd.）中重新鉴定出了19个PbKNOX转录因子。系统发育分析表明，这些转录因子被聚类为三组，具有10个保守基序，其中一些是组或亚组特异性的，这意味着它们对于这些进化枝中KNOX的功能很重要。 和 是首次在梨中鉴定出的 （编码一个MEINOX结构域但不编码一个同源异型结构域）基因。 和 中的 基因密切相关，并且观察到 和 中的 基因之间存在共线关系。对 基因在不同组织、不同生长阶段以及对非生物和生物胁迫响应中的表达模式分析表明， 参与植物生长和发育。我们对矮化突变品种的比较转录分析表明，与其他类别的基因相比，I类基因高度表达。对健壮品种和矮化品种杂交后代中 基因表达的分析表明， 基因在健壮后代中高度表达，而在矮化后代中弱表达。这些发现为KNOX转录因子在梨中的功能提供了新的见解，并将有助于未来对矮化果树的研究。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/36a0/8831332/2466463b78a7/fpls-13-806765-g007.jpg
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