Molecular Mechanism of Slow Vegetative Growth in Tetraploid

Overview

Journal Genes (Basel)

Publisher MDPI

Date 2020 Dec 2

PMID 33261043

Citations 8

Authors

Congping Xu

Ying Zhang

Qiang Han

Xiangyang Kang

Affiliations

Soon will be listed here.

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 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 , , , and being downregulated, and and 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.

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