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A Simple Method for Isolation of Soybean Protoplasts and Application to Transient Gene Expression Analyses
Published on: January 25, 2018
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Expression of storage-protein genes during soybean seed development
D W Meinke1, J Chen, R N Beachy
1Plant Biology Program, Department of Biology, Washington University, 63130, St. Louis, MO, USA.
Planta
|November 27, 2013
Summary
Soybean seed development involves two main storage proteins: conglycinin (7S) and glycinin (11S). Their accumulation and mRNA detection reveal distinct temporal patterns and differences between cotyledons and embryonic axes.
Area of Science:
- Plant Molecular Biology
- Biochemistry
- Soybean Seed Development
Background:
- Mature soybean seeds (Glycine max) store proteins, primarily glycosylated 7S conglycinin and non-glycosylated 11S glycinin.
- Understanding the synthesis and accumulation of these proteins is crucial for seed biology and crop improvement.
Purpose of the Study:
- To investigate the temporal accumulation of 7S and 11S storage proteins and their corresponding mRNAs during soybean seed development (cv. Provar).
- To compare the protein profiles between soybean cotyledons and embryonic axes.
Main Methods:
- SDS polyacrylamide gel electrophoresis for protein analysis.
- Northern (DNA-RNA) hybridization for mRNA detection.
- Analysis of protein and mRNA accumulation during seed development stages.
Main Results:
- Accumulation of 11S acidic/basic and 7S α'/α subunits began 18-20 days post-pollination.
- 7S β and 11S A-4 subunits appeared later, during seed maturation.
- mRNAs for 7S and 11S proteins were detected 14-18 days post-pollination, preceding protein accumulation.
- Soybean embryonic axes showed reduced levels of specific subunits and an additional 7S subunit compared to cotyledons.
Conclusions:
- Soybean seed storage protein synthesis exhibits distinct temporal regulation during development.
- Significant differences exist in the synthesis of storage proteins between soybean embryonic axes and cotyledons.
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