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Storage:Store at 2-8℃，6 months
Determination of Significance：
The root system is the main organ for water and mineral nutrient absorption in plants, as well as the organ for synthesis, assimilation and transformation of important substances such as amino acids and hormones in the plant body. Therefore, the growth and activity of roots directly affect the growth, nutrient level and yield level of individual plants, and it is of practical importance to determine the root vitality.
Measurement Principle：
Plant roots can oxidize α-naphthylamine adsorbed on the root surface to produce red α-hydroxy-1-naphthylamine, which is precipitated on the surface of oxidized roots, causing this part to be dyed red. α-Naphthylamine interacts with sodium p-aminobenzene sulfonate and nitrite under acidic conditions to produce a red azo dye. Root vitality can be expressed by the reduction of α-naphthylamine.
Self Provided：
Spectrophotometer, water bath/incubator, adjustable pipette, filter paper,1mL glass cuvette, distilled water..
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