I have to do SEM analysis of root samples colonized by a selected bacterium. After removal of roots from the pots, how long I can store the samples in 2.5% Glutaraldehyde solution. Is there any special treatment to increase the the storage period without affecting the colonized microbes?
Although I do not have enough experience experience in handling plant samples,I would however suggest to complete the examination under SEM as early as possible.
Rather than store glutaraldehyde, I would suggest that you continue the process and go through the dehydration series to the 70% ethanol stage, at which point you can store samples in a refrigerator. After that you can complete the dehydration and drying stages before EM work.
Dear Prof.
Thanks for your Wonderful suggestion Sir. this i can do. Nothing will happen to morphological features?.
It should be safe. As Dilip Kumar Pal says it is best to continue with little delay. How long are you intending to store the material for?
In the link is another recent discussion on prep for SEM of root material.
https://www.researchgate.net/post/Can_we_prepare_the_transverse_sections_of_plant_roots_for_SEM_without_cryopreservation_or_avoiding_the_ultralow_temperatures
If everything is fixed, rinsed, post-fixed, rinsed, and dehydrated through 30, 40, 50, 60, 70% alcohol you should be able to refrigerate and store. I have never stored anything that long, so I don't really know. It is usually an overnight store before continuation with dehydration.
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