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A colorimetric assay for cytokinin oxidase
C A Libreros-Minotta1, P A Tipton
1Department of Biochemistry, University of Missouri-Columbia 65211, USA.
Analytical Biochemistry
|November 1, 1995
Summary
A new colorimetric assay accurately measures cytokinin oxidase activity. This simple method works in crude plant extracts and is effective for submicromolar concentrations.
Area of Science:
- Biochemistry
- Plant Science
- Enzymology
Background:
- Cytokinin oxidase is a key enzyme in plant hormone metabolism.
- Accurate quantification of cytokinin oxidase is essential for understanding plant growth and development.
- Existing assays may lack simplicity, speed, or sensitivity.
Purpose of the Study:
- To develop a simple, rapid, and sensitive colorimetric assay for cytokinin oxidase.
- To validate the assay's performance in various plant sample types.
Main Methods:
- The assay utilizes the formation of a Schiff base.
- The reaction involves 3-methyl-2-butenal (an enzymatic product) and p-aminophenol.
- Colorimetric detection allows for quantification.
Main Results:
- The assay is effective in the submicromolar concentration range.
- The method is applicable to both crude plant extracts and purified enzyme preparations.
- Demonstrates simplicity and rapidity.
Conclusions:
- A novel, efficient colorimetric assay for cytokinin oxidase has been established.
- This assay provides a valuable tool for plant science research.
- Facilitates the study of cytokinin metabolism in diverse plant samples.