Are you sterile? Using aseptic technique for food safety

How do sterilization techniques affect our ability to preserve and culture organisms?
In vitro collecting (IVC) is the process of starting plant tissue cultures with minimal disturbance to the plants when viable seeds are not available. Become the field researcher and learn how to collect tissue samples in a non-sterile environment using aseptic techniques. Use standard laboratory operating procedures (SLOPs) to prepare media for the IVC process. See teacher background →

Lessons

# Introduction to IVC terminology

Use proper vocabulary to prepare and test IVC techniques.

Files

# Compare Leaf Sterilization to a Control

Collect a leaf from a plant. Compare the microbial growth from an untreated leaf to the microbial growth from a leaf treated with 70% isopropyl alcohol.

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# Comparison of IVC Treatments

Prepare various media treatments to prevent contamination of IVC and properly record the preparation information in a Medium Preparation log. Test various media treatments to compare their effectiveness at preventing contamination. Present findings in lab notebooks using the IVC Lab Rubric.

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Teacher background

In vitro collecting allows for the potential to conserve crops and wild or endangered species. The level of contamination must be controlled, which permits successful growth of any in vitro collected germplasm. Biotechnology has a wide variety of career opportunities ranging from sales and marketing, to research and development, manufacturing and quality control and assurance. The total number of biotechnology companies is increasing, and employment in the biotechnology field continues to grow as well.

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Next gen science standards

Science and engineering practices

  • Asking questions (for science) and defining problems (for engineering)
  • Planning and carrying out investigations
  • Analyzing and interpreting data
  • Obtaining, evaluating, and communicating information

Crosscutting concepts

  • Cause and effect

Disciplinary core ideas/content

  • ESS3A Natural resources
  • ESS3C Human impacts on Earth systems
  • LS1B Growth and development of organisms
  • LS2A Interdependent relationships in ecosystems
  • LS4C Adaptation
  • LS4D Biodiversity and humans
  • ETS1B Developing possible solutions

Curriculum author