Arabidopsis thaliana

The Model Organism

Arabidopsis thaliana

Arabidopsis thaliana (a.k.a. thale cress, mouse-ear cress) is a model organism for plant biology and genetics.  Arabidopsis was the first plant to ever have its genome fully sequenced and also has a short life cycle. Hence, it is grown in space relatively often to gather important scientific data. Arabidopsis has been grown on the International Space Station and first flowered in 1982 aboard Soviet Salyut 7.  Arabidopsis is critical to spaceflight plant biology research.

Arabidopsis thaliana was the first plant to flower and produce seeds in space.  It is also one of the most common plants to be sent to space.

Use for Astrobotany

Arabidopsis thaliana is a critical plant for astrobotany research, just as it is critical for botany research.  Arabidopsis‘ key attributes make it one of the most common plants grown in space, especially for transcriptomic research.  Since Arabidopsis has a fully mapped genome,  it offers insights into how plants respond to stressors of spaceflight on a molecular level.  However, the same qualities that make it ideal for research make it essentially unusable as a source of food in space. 

Key Attributes

  • Small genome: 5 chromosomes, 27,000 genes
  • First plant genome fully sequenced
  • Small physical size saves space- Arabidopsis can be grown on Petri dishes or in small containers
  • Rapid lifecycle – approximately 6 weeks

Additional Resources

  • ABRC – Search for natural accessions and laboratory strains of Arabidopsis thaliana
  • TAIR (The Arabidopsis Information Resource) – TAIR (arabidopsis.org) is the premier database for Arabidopsis thaliana molecular biology research.  Use this site to find out more about the Arabidopsis genome, or use it to find gene-specific functions or T-DNA insertion lines. 
  • TAIR BLAST – This bioinformatic tool can be used to check flanking regions to design promoters and check for promoter length.  It also has a robust visualization tool to see where the gene of interest is expressed in the plant.

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