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Updated: Aug 16, 2025
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Experimental Design for Laser Microdissection RNA-Seq: Lessons from an Analysis of Maize Leaf Development
Published on: March 5, 2017
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Dynamic landscape of long noncoding RNAs during leaf aging in Arabidopsis
Jung Yeon Kim1, Juhyeon Lee1, Myeong Hoon Kang1
1Department of New Biology, Daegu Gyeongbuk Institute of Science and Technology (DGIST), Daegu, South Korea.
Frontiers in Plant Science
|December 19, 2022
Summary
Long noncoding RNAs (lncRNAs) are crucial regulators of leaf senescence, the vital process of nutrient relocation in plants. This study identified 446 age-related lncRNAs (AR-lncRNAs) and validated their role in leaf aging.
Area of Science:
- Plant Biology
- Molecular Biology
- Genetics
Background:
- Leaf senescence is a critical developmental stage for nutrient remobilization in plants.
- The genetic regulation of leaf senescence involves complex, multi-layered mechanisms.
- The role of long noncoding RNAs (lncRNAs) in leaf senescence was previously largely unknown.
Purpose of the Study:
- To identify and characterize the genome-wide landscape of lncRNAs during leaf aging.
- To investigate the expression patterns and regulatory roles of lncRNAs in leaf senescence.
- To explore potential functional mechanisms of lncRNAs in leaf aging.
Main Methods:
- Comprehensive RNA-sequencing analysis of leaf tissues across all developmental stages.
- Identification and classification of lncRNAs, including novel unannotated transcripts.
- Time-course expression profiling to identify age-related lncRNAs (AR-lncRNAs).
- Bioinformatic inference of lncRNA functions based on miRNA and mRNA interactions.
- Experimental validation of selected AR-lncRNAs using molecular and phenotypic analyses.
Main Results:
- A total of 771 lncRNAs were identified, with 232 being unannotated.
- 446 lncRNAs exhibited age-related expression patterns (AR-lncRNAs), with dynamic regulation during senescence.
- Inferred functions included antisense regulation, competitive endogenous RNA (ceRNA) activity, and mRNA interaction.
- Experimental validation confirmed the senescence regulatory roles of three novel AR-lncRNAs.
Conclusions:
- Age-related lncRNAs (AR-lncRNAs) are dynamically regulated and play significant roles in leaf senescence.
- This study provides a valuable resource of AR-lncRNAs and their potential regulatory networks.
- AR-lncRNAs are important genetic elements contributing to the leaf senescence process.
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