Acta Agriculturae Zhejiangensis ›› 2022, Vol. 34 ›› Issue (6): 1141-1151.DOI: 10.3969/j.issn.1004-1524.2022.06.05

• Crop Science • Previous Articles     Next Articles

Cloning and target gene screening of miR397 in potato

LI Wenxiang1(), WANG Fang1,2,3,4,5,6,*(), WANG Jian1,2,3,4,5,6   

  1. 1. College of Agriculture and Animal HUsbandry, Qinghai University, Xining 810016, China
    2. Qinghai Academy of Agriculture and Forestry Sciences, Xining 810016, China
    3. Key Laboratory of Qinghai-Tibetan Plateau Biotechnology of Ministry of Education, Xining 810016, China
    4. Key Laboratory of Potato Breeding of Qinghai, Xining 810099, China
    5. Engineering Research Center of Potato in Northwest Region, Ministry of Education, Xining 810016, China
    6. State key Laboratory of Plateau Ecology and Agriculture, Xining 810016, China
  • Received:2022-02-22 Online:2022-06-25 Published:2022-06-30
  • Contact: WANG Fang

Abstract:

miR397 is widely involved in plant stress response. In this study, the precursor sequence of miR397 was isolated from potato leaves, the StmiR397 was cloned and its potential target genes were predicted. The qRT-PCR was used to analyze the expression patterns of different low-temperature phenotypic materials, the results showed: the length of precursor sequence of potato miR397 was 81 bp, which could form stable stem-loop structure, and the mature sequence was located at the 5' end. The upstream regulatory region contained various stress response elements such as temperature response. Under low temperature treatment, the expression of StmiR397 was up-regulated in the leaves of the low-temperature resistant material DR-2, and the expression showed no difference in the roots, while the expression of StmiR397 showed no difference in the leaves of the low-temperature sensitive material Favorite, and the expression was up-regulated in the roots. According to the expression patterns analyses of the 10 predicted target genes, oxidoreductase-like domain-containing protein gene, zinc knuckle (CCHC-type) family protein gene of the reverse inhibitory target genes and the positive activation target genes 6-phosphate 1-phosphotransferase subunit alpha gene and auxin-induced beta-glucosidase gene were initially screened. This study provides a certain reference for further research on the regulatory network of StmiR397 and target genes.

Key words: potato, low temperature stress, target gene

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