Key regulatory pathways, microRNAs, and target genes participate in adventitious root formation of Acer rubrum L
Abstract Red maple ( Acer rubrum L.) is a type of colorful ornamental tree with great economic value. Because this tree is difficult to root under natural conditions and the seedling survival rate is low, vegetative propagation methods are often used. Because the formation of adventitious roots (ARs...
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Published in | Scientific reports Vol. 12; no. 1; p. 12057 |
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Main Authors | , , , , , |
Format | Journal Article |
Language | English |
Published |
London
Nature Publishing Group
14.07.2022
Nature Publishing Group UK Nature Portfolio |
Subjects | |
Online Access | Get full text |
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Summary: | Abstract
Red maple (
Acer rubrum
L.) is a type of colorful ornamental tree with great economic value. Because this tree is difficult to root under natural conditions and the seedling survival rate is low, vegetative propagation methods are often used. Because the formation of adventitious roots (ARs) is essential for the asexual propagation of
A. rubrum
, it is necessary to investigate the molecular regulatory mechanisms of AR formation in
A. rubrum
. To address this knowledge gap, we sequenced the transcriptome and small RNAs (sRNAs) of the
A. rubrum
variety ‘Autumn Fantasy’ using high-throughput sequencing and explored changes in gene and microRNA (miRNA) expression in response to exogenous auxin treatment. We identified 82,468 differentially expressed genes (DEGs) between the treated and untreated ARs, as well as 48 known and 95 novel miRNAs. We also identified 172 target genes of the known miRNAs using degradome sequencing. Two key regulatory pathways (ubiquitin mediated proteolysis and plant hormone signal transduction),
Ar-miR160a
and the target gene
auxin response factor 10
(
ArARF10
) were selected based on KEGG pathway and cluster analyses. We further investigated the expression patterns and regulatory roles of
ArARF10
through subcellular localization, transcriptional activation, plant transformation, qRT-PCR analysis, and GUS staining. Experiments overexpressing
ArARF10
and
Ar-miR160a
, indicated that
ArARF10
promoted AR formation, while
Ar-miR160a
inhibited AR formation. Transcription factors (TFs) and miRNAs related to auxin regulation that promote AR formation in
A. rubrum
were identified. Differential expression patterns indicated the
Ar-miR160a
-
ArARF10
interaction might play a significant role in the regulation of AR formation in
A. rubrum
. Our study provided new insights into mechanisms underlying the regulation of AR formation in
A. rubrum
. |
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Bibliography: | ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23 |
ISSN: | 2045-2322 2045-2322 |
DOI: | 10.1038/s41598-022-16255-7 |