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Plant Promoter Analysis: Identification and Characterization of Root Nodule Specific Promoter in the Common Bean
Published on: December 23, 2017
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Comprehensive Identification and Expression Profiling of Circular RNAs During Nodule Development in Phaseolus
Zhihua Wu1,2, Wen Huang1,2, Erdai Qin1,2
1Hubei Provincial Key Laboratory for Protection and Application of Special Plant Germplasm in Wuling Area of China, College of Life Sciences, South-Central University for Nationalities, Wuhan, China.
Frontiers in Plant Science
|November 16, 2020
Summary
Circular RNAs (circRNAs) are newly identified regulators in legume-rhizobium symbiosis. This study reveals specific circRNAs are crucial during nitrogen fixation, acting as post-transcriptional regulators in common bean plants.
Area of Science:
- Plant molecular biology
- Epigenetics
- Agricultural science
Background:
- Symbiotic nitrogen fixation by legumes is vital for sustainable agriculture.
- Circular RNAs (circRNAs) are emerging regulators in plant gene expression.
- The role of circRNAs in legume-rhizobium symbiosis remains unexplored.
Purpose of the Study:
- To identify and characterize circRNAs during common bean nodulation.
- To investigate the expression patterns and potential functions of circRNAs in legume symbiosis.
- To elucidate the role of circRNAs in the legume-rhizobium interaction.
Main Methods:
- RNA sequencing (circRNA-seq and mRNA-seq) of common bean roots and nodules.
- Comprehensive identification and expression profiling of circRNAs.
- Bioinformatic analysis including gene ontology (GO) and pathway analysis.
- Construction of circRNA-miRNA-mRNA regulatory networks.
Main Results:
- 8,842 high-confidence circRNAs were identified, with 3,448 specific to symbiosis.
- circRNAs exhibited distinct spatiotemporal expression patterns during nodule development.
- circRNAs potentially regulate transmembrane transport and kinase activity as miRNA sponges.
- circRNA expression is partially independent of parental gene expression during symbiosis.
Conclusions:
- Circular RNAs are novel post-transcriptional regulators in legume-rhizobium symbiosis.
- Specific circRNAs play significant roles during nodulation and nitrogen fixation.
- This study provides a foundation for understanding circRNA functions in plant-microbe interactions.
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