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Chilling stress-induced proteomic changes in rice roots.
Dong-Gi Lee1, Nagib Ahsan, Sang-Hoon Lee
1Division of Applied Life Science, IALS, Gyeongsang National University, Jinju, Republic of Korea.
Journal of Plant Physiology
|April 25, 2008
Summary
Rice root proteome analysis under chilling stress identified 27 up-regulated proteins. Novel proteins involved in energy, metabolism, and detoxification offer insights into plant cold response mechanisms.
Area of Science:
- Plant Biology
- Molecular Biology
- Stress Physiology
Background:
- Plant roots are crucial and sensitive organs.
- Understanding chilling stress responses is vital for plant survival.
- Tissue-specific proteome analysis provides insights into stress adaptation.
Purpose of the Study:
- To investigate rice root proteome patterns under chilling stress.
- To identify novel proteins involved in cold stress response.
- To compare transcriptional and translational levels of gene expression.
Main Methods:
- Rice seedlings exposed to 10°C for 24 and 72 hours.
- Two-dimensional gel electrophoresis (2-DE) and mass spectrometry (MALDI-TOF, ESI-MS/MS).
- Sample fractionation using polyethylene glycol (PEG) for low-abundant protein identification.
Main Results:
- Identified 27 up-regulated proteins in rice roots under chilling stress.
- Discovered novel proteins including acetyl transferase, glyoxalase 1, and NSF attachment protein.
- Observed discrepancies between mRNA and protein expression levels.
Conclusions:
- The identified proteins are involved in energy production, metabolism, vesicular trafficking, and detoxification.
- Root proteome analysis enhances understanding of plant chilling stress molecular basis.
- Novel proteins contribute to plant adaptation and survival under cold conditions.
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