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avoid locating adjacent to laboratories that handle microorganisms or insects or facilities that store seeds or other plant materials
location considerations
avoid having plotted plants
refrain from field or greenhouse work
shower and change clothes
how to ensure clean cultures in lab
a. media preparation / culture evaluation / record-keeping
b. aseptic transfer area
c. environmentally controlled culture area
different work areas in a plant culture laboratory
air vents
high foot traffic
contamination may come from
1. Bench
2. Gas outlet
3. Hot plate and magnetic stirrer
4. Analytical and top-loading balances
5. pH meter
6. Refrigerator, freezer
7. Water purification and storage system
8. Dish-washing area
9. Storage facilities—glassware, chemicals
10. Autoclave (pressure cooker will work for small media volume)
11. Low bench with inverted light and dissecting microscopes
12. Fume hood
13. Desk and file cabinets
14. Desktop centrifuge, spectrophotometer, microwave (transformation studies and protoplast isolation)
equipment in Media preparation/culture evaluation/record-keeping area
ph meter, balances, sink, reagents, and stock solutions
what are the components of laboratory chemical bench
laboratory chemical bench
where may culture media be prepared
at least 30 mins
Culture tubes containing spent medium should be autoclaved at
low bench, table, file cabinet
essential for culture evaluation and record-keeping
1. Laminar airflow transfer hood and comfortable chair
2. Dissecting microscope
3. Gas outlet
4. Vacuum lines
5. Forceps, spatulas, scalpel, and disposable blades
equipment in Aseptic transfer area
positive-pressure airflow
good ventilation
separate room for transfer hood should have
fume hood that has been thoroughly scrubbed down
carboard boxes lined with aluminum foil or plastic containers
HEPA (high efficiency particulate air filter) attached to plastic storage box
alternatives for laminar airflow hood
1. Shelves with lighting on a timer and controlled temperature
2. Incubators—with controlled temperature and light
3. Orbital shakers
equipment in Environmentally controlled culture area
increases contamination
High humidity in the culture room should be avoided because it
25C-27C under a 16:8-h light:dark photoperiod
Most cultures can be incubated in a temperature range