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Related Experiment Video

Updated: Dec 24, 2025

Genome-wide Analysis of Histone Modifications Distribution using the Chromatin Immunoprecipitation Sequencing Method in Magnaporthe oryzae

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OsNSUN2-Mediated 5-Methylcytosine mRNA Modification Enhances Rice Adaptation to High Temperature.

Yongyan Tang¹, Chun-Chun Gao², Ying Gao³

¹Key Laboratory of Plant Molecular Physiology, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China.

Developmental Cell

|April 11, 2020

Summary

Rice plants use RNA modifications to adapt to heat. OsNSUN2 enhances messenger RNA (mRNA) stability, boosting protein synthesis and photosynthesis under heat stress, crucial for crop survival.

Keywords:

OsNSUN2 RNA modification heat stress m(5)C methyltransferase photosynthesis reactive oxygen species rice

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Last Updated: Dec 24, 2025

Genome-wide Analysis of Histone Modifications Distribution using the Chromatin Immunoprecipitation Sequencing Method in Magnaporthe oryzae

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Methylated RNA Immunoprecipitation Assay to Study m5C Modification in Arabidopsis

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Published on: May 14, 2020

Area of Science:

Plant Biology
Molecular Biology
Agronomy

Background:

Extreme weather events, such as heat waves, negatively impact crop production.
Plant thermoresponse involves protein degradation, rRNA homeostasis, and transcription factors.
The role of RNA modifications in plant temperature stress response is largely unexplored.

Purpose of the Study:

To investigate the function of RNA modifications in rice response to temperature stress.
To identify key players in RNA-mediated heat acclimation mechanisms in plants.

Main Methods:

Identification of OsNSUN2 as an RNA 5-methylcytosine (m⁵C) methyltransferase in rice.
Phenotypic analysis of osnsun2 mutant under varying temperature and light conditions.
Analysis of mRNA m⁵C modification levels and protein synthesis under heat stress.
Assessment of photosystem integrity and reactive oxygen species accumulation.

Main Results:

The osnsun2 mutant exhibited temperature- and light-dependent lesion-mimic phenotypes and hypersensitivity to heat stress.
Heat stress increased OsNSUN2-dependent m⁵C modification of photosynthesis and detoxification-related mRNAs, enhancing protein synthesis.
The mutant's photosystem was vulnerable to high temperatures, and repair mechanisms were impaired.
OsNSUN2 mutation led to reduced photosynthesis efficiency and increased reactive oxygen species under heat treatment.

Conclusions:

OsNSUN2 plays a critical role in rice heat acclimation through mRNA m⁵C modification.
This mechanism enhances protein synthesis, maintains photosystem function, and mitigates heat-induced damage.
OsNSUN2-mediated RNA modification represents a key pathway for improving crop resilience to extreme temperatures.