ER Microsome Preparation in Arabidopsis thaliana
1Department of Biological and Medical Sciences, Oxford Brookes University, OX3 0BP, Oxford, UK. vkriechbaumer@brookes.ac.uk.
Methods in Molecular Biology (Clifton, N.J.)
|October 19, 2017
Summary
Researchers developed a method to isolate endoplasmic reticulum (ER) microsomes from Arabidopsis thaliana seedlings. This protocol enables the study of enzyme activity and auxin synthesis in plant cell fractions.
Area of Science:
- Plant molecular biology
- Cellular biochemistry
Background:
- Microsomes, vesicles from the endoplasmic reticulum (ER), are crucial for studying cellular functions in vitro.
- Understanding ER functions like protein and lipid synthesis is vital in plant science.
Purpose of the Study:
- To establish a protocol for isolating ER-derived microsomes from Arabidopsis thaliana seedlings.
- To demonstrate the utility of these microsomes in enzyme assays for quantifying auxin synthesis.
Main Methods:
- Isolation of microsomes from Arabidopsis thaliana seedlings.
- Enzyme assays using auxin precursors tryptophan (Trp) or indole-3-pyruvic acid (IPyA).
- Quantification of auxin synthetic capacity in microsomal and cytosolic fractions.
Main Results:
- A reliable protocol for isolating ER-derived microsomes from plant tissues was successfully developed.
- The purified microsomes were effectively used to measure enzyme activity related to auxin biosynthesis.
- Differential auxin synthetic capacity was observed between microsomal and cytosolic fractions.
Conclusions:
- The described protocol provides a valuable tool for investigating ER functions in plants.
- This method allows for the detailed analysis of auxin biosynthesis pathways in specific cellular compartments.
- The findings contribute to a better understanding of plant hormone regulation at the molecular level.
