LncRNA regulates tomato fruit cracking by coordinating gene expression via a hormone-redox-cell wall network

生物 基因表达 木聚糖 基因 细胞壁 非生物胁迫 生物化学 基因表达调控 细胞生物学 转录因子
作者
Lingzi Xue,Mintao Sun,Zhiyong Wu,Lijie Yu,Qinghui Yu,Yaping Tang,Fangling Jiang
出处
期刊:BMC Plant Biology [Springer Nature]
卷期号:20 (1) 被引量:28
标识
DOI:10.1186/s12870-020-02373-9
摘要

Abstract Background Fruit cracking occurs easily under unsuitable environmental conditions and is one of the main types of damage that occurs in fruit production. It is widely accepted that plants have developed defence mechanisms and regulatory networks that respond to abiotic stress, which involves perceiving, integrating and responding to stress signals by modulating the expression of related genes. Fruit cracking is also a physiological disease caused by abiotic stress. It has been reported that a single or several genes may regulate fruit cracking. However, almost none of these reports have involved cracking regulatory networks. Results Here, RNA expression in 0 h, 8 h and 30 h saturated irrigation-treated fruits from two contrasting tomato genotypes, ‘LA1698’ (cracking-resistant, CR) and ‘LA2683’ (cracking-susceptible, CS), was analysed by mRNA and lncRNA sequencing. The GO pathways of the differentially expressed mRNAs were mainly enriched in the ‘hormone metabolic process’, ‘cell wall organization’, ‘oxidoreductase activity’ and ‘catalytic activity’ categories. According to the gene expression analysis, significantly differentially expressed genes included Solyc02g080530.3 ( Peroxide, POD ), Solyc01g008710.3 ( Mannan endo-1,4-beta-mannosidase, MAN ), Solyc08g077910.3 ( Expanded, EXP ), Solyc09g075330.3 ( Pectinesterase, PE ), Solyc07g055990.3 ( Xyloglucan endotransglucosylase-hydrolase 7, XTH7 ), Solyc12g011030.2 ( Xyloglucan endotransglucosylase-hydrolase 9, XTH9 ), Solyc10g080210.2 ( Polygalacturonase-2, PG2 ), Solyc08g081010.2 ( Gamma-glutamylcysteine synthetase, gamma-GCS ), Solyc09g008720.2 ( Ethylene receptor, ER ), Solyc11g042560.2 ( Ethylene-responsive transcription factor 4, ERF4 ) etc. In addition, the lncRNAs (XLOC_16662 and XLOC_033910, etc) regulated the expression of their neighbouring genes, and genes related to tomato cracking were selected to construct a lncRNA-mRNA network influencing tomato cracking. Conclusions This study provides insight into the responsive network for water-induced cracking in tomato fruit. Specifically, lncRNAs regulate the hormone-redox-cell wall network, including plant hormone (auxin, ethylene) and ROS (H 2 O 2 ) signal transduction and many cell wall-related mRNAs ( EXP, PG, XTH ), as well as some lncRNAs (XLOC_16662 and XLOC_033910, etc.).
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