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Updated: Jul 24, 2026
12:01
Long-term, High-resolution Confocal Time Lapse Imaging of Arabidopsis Cotyledon Epidermis during Germination
Published on: December 31, 2012
Cell Differentiation and Morphogenesis Are Uncoupled in Arabidopsis raspberry Embryos
R. Yadegari1, GRd. Paiva, T. Laux
1Department of Biology, University of California, Los Angeles, California 90024-1606.
The Plant Cell
|December 1, 1994
Summary
Two Arabidopsis embryo mutants, raspberry1 and raspberry2, fail to transition from globular to heart stage, exhibiting enlarged, raspberry-like protuberances. Their suspensor regions abnormally differentiate, suggesting cell differentiation can occur without organ formation.
Area of Science:
- Plant developmental biology
- Arabidopsis thaliana embryogenesis
- Molecular genetics
Background:
- Arabidopsis embryogenesis involves precise morphological transitions.
- Mutants can reveal critical genetic pathways controlling development.
Purpose of the Study:
- To identify and characterize new mutants affecting Arabidopsis embryogenesis.
- To investigate the relationship between embryo-proper morphogenesis and suspensor development.
Main Methods:
- Screening of T-DNA-mutagenized Arabidopsis lines.
- Phenotypic analysis of embryo mutants.
- In situ hybridization to study gene expression patterns.
Main Results:
- Identified raspberry1 and raspberry2 mutants with defects in embryo-proper morphogenesis.
- Mutant embryos fail to transition to heart stage and develop enlarged, vacuolated embryo-proper regions with raspberry-like protuberances.
- Enlarged suspensor regions in mutants exhibit embryo-proper-like mRNA accumulation patterns, indicating radial tissue differentiation.
Conclusions:
- Cell differentiation can occur independently of organ formation and morphogenesis during plant embryogenesis.
- Interactions between the embryo-proper and suspensor are crucial for normal development.
- Defects in embryo-proper development can induce aberrant differentiation in the suspensor.
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