| Literature DB >> 33261043 |
Congping Xu1,2,3, Ying Zhang1,2,3, Qiang Han1,2,3, Xiangyang Kang1,2,3.
Abstract
Tetraploid plants often have altered rates of vegetative growth relative to their diploid progenitors. However, the molecular basis for altered growth rates remains a mystery. This study reports microRNA (miRNA) and gene expression differences in Populus tetraploids and counterpart diploids using RNA and miRNA sequencing. The results showed that there was no significant difference between young leaves in the expression of vegetative growth-related miRNAs. However, as leaves aged, the expression of auxin- and gibberellin-related miRNAs was significantly upregulated, while the expression of senescence-related miRNAs was significantly downregulated. The dose effect enhanced the negative regulation of the target genes with ARFs, GA20ox, GA3ox, and GAMYB being downregulated, and TCP and NAC being upregulated. As a result, the chloroplast degradation of tetraploid leaves was accelerated, the photosynthetic rate was decreased, and the synthesis and decomposition ability of carbohydrate was decreased.Entities:
Keywords: Populus; differential genes; dose effects; endogenous hormones; miRNAs; tetraploid
Mesh：
Substances：
Year: 2020 PMID： 33261043 PMCID： PMC7761321 DOI： 10.3390/genes11121417
Source DB: PubMed Journal: Genes (Basel) ISSN： 2073-4425 Impact factor: 4.096