How to prepair Shiff's reagent to show histochemically lipid aldehydes (mda) content alteration within plant tissues?

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Michael G. Weller

You probably mean Schiff's reagent: https://en.wikipedia.org/wiki/Schiff_test

It is available from many chemical suppliers, such as Sigma-Aldrich or Roth.

Huda Jamal Al-Adhami

I think you want to check the plant tissue in a specific plant. Initially extract the aldehyde from your plant and make the Schiff base reaction as mentioned in the comment of Dr. Michael G. Weller