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Differentially expressed genes under cold acclimation in Physcomitrella patens.

Ming-Ming Sun1, Lin-Hui Li, Hua Xie

  • 1College of Life Science, Capital Normal University, Beijing 100037, China.

Journal of Biochemistry and Molecular Biology
|December 1, 2007
PubMed
Summary
This summary is machine-generated.

Cold acclimation enhances plant freezing tolerance. This study reveals that cold acclimation in the bryophyte Physcomitrella patens shares similarities and distinct differences with higher plants, indicating evolutionary changes in land plants.

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Area of Science:

  • Plant Biology
  • Molecular Biology
  • Evolutionary Biology

Background:

  • Cold acclimation is crucial for plant freezing tolerance.
  • Signaling pathways for low-temperature stress are well-studied in higher plants.
  • Understanding these pathways in bryophytes is limited.

Purpose of the Study:

  • To investigate cold acclimation pathways in bryophytes.
  • To identify genes involved in cold stress response in Physcomitrella patens.
  • To compare cold acclimation mechanisms between bryophytes and higher plants.

Main Methods:

  • Utilized PCR-based differential screening techniques: cDNA amplified fragment length polymorphism (cDNA-AFLP) and suppression subtractive hybridization (SSH).
  • Isolated 510 differentially expressed expressed sequence tags (ESTs) during cold acclimation in Physcomitrella patens.
  • Employed realtime RT-PCR to validate the expression of 29 selected transcripts.

Main Results:

  • Identified 510 ESTs differentially expressed during cold acclimation in Physcomitrella patens.
  • Realtime RT-PCR confirmed differential expression for 29 transcripts.
  • Demonstrated that cold acclimation in Physcomitrella patens is partly conserved with higher plants but also shows unique features.

Conclusions:

  • Cold acclimation mechanisms in bryophytes share commonalities with higher plants.
  • Distinct differences in cold acclimation pathways suggest significant evolutionary alterations during land plant evolution.
  • Physcomitrella patens serves as a model for studying the evolution of plant stress responses.