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Acta Horticulturae Sinica ›› 2023, Vol. 50 ›› Issue (3): 583-595.doi: 10.16420/j.issn.0513-353x.2021-1280

• Research Papers • Previous Articles     Next Articles

Targets Prediction and Function Analysis of Potato miR319 Gene Family

YIN Jian1,2, ZHU Xijian1,2, WU Yaoyao3, LI Canhui1,*(), ZHANG Jinzhe2,*()   

  1. 1Yunnan Key Laboratory of Potato Biology,Yunnan Normal University,Kunming 650500,China
    2Institute of Vegetables and Flowers,Chinese Academy of Agricultural Sciences,Beijing 100081,China
    3Agricultural Genomics Institute at Shenzhen,Chinese Academy of Agricultural Sciences,Shenzhen,Guangdong 518120,China

Abstract:

The Stu-miR319 sequences were analyzed to illustrate the function of miR319 gene family in potato. The results showed that there were three Stu-miR319 precursor genes generating five mature sequences. Sequence alignment showed that miR319 mature sequences were highly conserved among different species,while the conservative location distributions are quite different. Phylogenetic analysis revealed that these three Stu-miR319 precursor genes belonged to different clades,which had different evolutionary relationships. Tissue specific expression analysis showed that five mature Stu-miR319 were highly expressed in leaves. Three Stu-miR319 precursor genes overexpressing transgenic lines were generated,and the candidate targets of each Stu-miR319 mature sequences were analyzed. The results showed that each of Stu-miR319-5pStu-miR319-3pStu-miR319A-5p and Stu-miR319b have four candidate targets,while Stu-miR319a-3p has only two. Transmission electron microscopy analysis showed that the cell wall of leaf vessel elements in lines with Stu-miR319 overexpressing was severely degraded. The results indicate that the Stu-miR319 gene family plays an important role in regulating the cell wall integrity of leaf vessel elements.

Key words: potato, miR319, target gene, cell wall

CLC Number: