Comparative transcriptome analysis reveals the molecular mechanism of salt tolerance in Apocynum venetum

Copyright © 2021 Elsevier Masson SAS. All rights reserved.

Bibliographische Detailangaben
Veröffentlicht in:Plant physiology and biochemistry : PPB. - 1991. - 167(2021) vom: 01. Okt., Seite 816-830
1. Verfasser: Xu, Zongchang (VerfasserIn)
Weitere Verfasser: Wang, Meng, Ren, Tingting, Li, Keyang, Li, Yiqiang, Marowa, Prince, Zhang, Chengsheng
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2021
Zugriff auf das übergeordnete Werk:Plant physiology and biochemistry : PPB
Schlagworte:Journal Article Apocynum venetum Differential gene expression Flavonoid RNA-Seq Salt stress Transcriptome profiles
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520 |a Apocynum venetum is a traditional Chinese medicinal herb with tolerance to various abiotic stresses, especially, salinity. However, only a few studies have investigated the salt-tolerant mechanism of this non-halophyte under salt stress at phenotypic and physiological levels. To explore the molecular mechanism of salinity tolerance in A. venetum, the global transcriptome profiles of seedling leaves under different salt-stress durations, using 200 mM NaCl, were analyzed. De novo assembly of approximately 715 million high-quality reads and approximately 105.61 Gb sequence data was performed. In total, 2822 differentially expressed genes (DEGs) were identified. DEGs were significantly enriched in flavonoid metabolism-related pathways such as "flavonoid biosynthesis" and "phenylpropanoid biosynthesis". Most of these DEGs were downregulated under salt stress. However, genes encoding the non-selective cation channels and antioxidants were upregulated under salt stress, whereas most cell wall-related DEGs were downregulated. Consequently, the concentration of flavonoids decreased, whereas that of Na+ increased with exposure time. Thus, we hypothesized that the accumulation of Na+ in the leaves, which resulted in reduced flavonoid concentration under salt stress, directly led to a decrease in the salt tolerance of A. venetum. This was verified by overexpressing four flavonoid synthesis pathway genes in Arabidopsis. The transgenic plants showed higher salt tolerance than the wild-type plants due to the accumulation of total flavonoids. These physiological and transcriptome analyses of A. venetum revealed major molecular underpinnings contributing to the responses of A. venetum to salt stress, thereby improving our understanding of the molecular mechanisms underlying salt tolerance in A. venetum and plants in general. The findings serve as a basis for functional studies on and engineering strategies for plant salinity tolerance 
650 4 |a Journal Article 
650 4 |a Apocynum venetum 
650 4 |a Differential gene expression 
650 4 |a Flavonoid 
650 4 |a RNA-Seq 
650 4 |a Salt stress 
650 4 |a Transcriptome profiles 
700 1 |a Wang, Meng  |e verfasserin  |4 aut 
700 1 |a Ren, Tingting  |e verfasserin  |4 aut 
700 1 |a Li, Keyang  |e verfasserin  |4 aut 
700 1 |a Li, Yiqiang  |e verfasserin  |4 aut 
700 1 |a Marowa, Prince  |e verfasserin  |4 aut 
700 1 |a Zhang, Chengsheng  |e verfasserin  |4 aut 
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