Biotechnology Bulletin ›› 2020, Vol. 36 ›› Issue (12): 42-53.doi: 10.13560/j.cnki.biotech.bull.1985.2020-0241

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Mining of Genes Related to Reactive Oxygen Species Scavenging in Response to Salt Stress in Nicotiana alata Based on Transcriptome Sequencing

LU Lin1(), YANG Shang-yu2, LIU Wei-dong1, LU Li-ming2()   

  1. 1. College of Landscape Architecture,Sichuan Agricultural University,Chengdu 611130
    2. College of Agronomy,Sichuan Agricultural University,Chengdu 611130
  • Received:2020-03-09 Online:2020-12-26 Published:2020-12-22
  • Contact: LU Li-ming E-mail:001lulin2003@163.com;louis_luliming@126.com

Abstract:

In order to identify the genes related to reactive oxygen species(ROS)scavenging involved in salt stress response of Nicotiana tabacum seedlings,tobacco plants were treated with 200 mmol/L NaCl,and the samples of the seedlings were collected at 12 h after the treatment. After total RNA was extracted,high-throughput sequencing technology was carried out to sequence the transcriptome. On the basis of GO and KEGG analysis of the differentially expressed genes,ROS scavenging genes involved were mined,and the results of transcriptome sequencing were verified by qRT-PCR. The results showed that there were 7 239 genes(P < 0.01)with more than two-fold in the expression of tobacco genes after high salt treatment,among which 4 037 genes were up-regulated and 3 162 genes were down-regulated. The functions of these differentially expressed genes were classified into 159 GO items in three categories:biological process,cell components and molecular functions,and were significantly enriched in 12 KEGG metabolic pathways. Meanwhile,the expressions of 45 genes related to ROS scavenging processes changed significantly in tobacco plants under high salt stress,among which 28 genes were up-regulated and 17 genes were down-regulated. The results of this study suggest that the enhanced ROS scavenging ability could be one of the essential mechanisms of N. alata plants in response to salt stress.

Key words: Nicotiana alata, transcriptome, salt stress, reactive oxygen species(ROS)