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Integrated transcriptome, small RNA, and degradome analysis reveals the complex network regulating starch
Xiaocong Zhang1, Sidi Xie1,2, Jienan Han1
1Institute of Crop Science, Chinese Academy of Agricultural Sciences, Beijing, China.
BMC Genomics
|July 13, 2019
Summary
MicroRNAs (miRNAs) regulate starch biosynthesis in maize endosperm, impacting grain yield and quality. This study reveals miRNA networks that modulate starch production, offering insights into molecular mechanisms.
Area of Science:
- Plant Molecular Biology
- Agricultural Science
- Genetics
Background:
- Starch biosynthesis in maize endosperm is crucial for grain yield and quality.
- Regulation of starch biosynthetic genes by microRNAs (miRNAs) is not well understood.
Purpose of the Study:
- Investigate the role of miRNAs in regulating starch biosynthesis in maize endosperm.
- Identify specific miRNAs and their target genes involved in starch production.
Main Methods:
- Analyzed small RNA, degradome, and transcriptome sequencing data from maize endosperm.
- Performed comparative transcriptome analysis between two maize inbred lines (Mo17 and Ji419).
- Constructed a co-expression regulatory network and validated miRNA-mediated pathways.
Main Results:
- Identified 33 differentially expressed starch biosynthetic genes and 22 differentially expressed miRNAs.
- Discovered that 19 miRNAs can modulate starch biosynthesis by targeting 19 genes.
- Validated four miRNA-mediated pathways involving transcription factors.
Conclusions:
- MicroRNAs play a critical role in maize endosperm starch biosynthesis.
- miRNA-mediated networks are key regulators of starch production in maize endosperm.
- Provided insights into the molecular mechanisms of starch biosynthesis in developing maize.
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