Related Experiment Video
Updated: Aug 13, 2026
10:24
Floral-dip Transformation of Arabidopsis thaliana to Examine pTSO2::β-glucuronidase Reporter Gene Expression
Published on: June 11, 2010
TSO1 functions in cell division during Arabidopsis flower development
Z Liu1, M P Running, E M Meyerowitz
1Division of Biology, California Institute of Technology, Pasadena 91125, USA. zl17@umail.umd.edu
Development (Cambridge, England)
|February 1, 1997
Summary
The Arabidopsis tso1 mutant forms callus instead of floral organs due to defects in cell division and cytokinesis. This suggests TSO1 is crucial for floral organ development, potentially acting as a floral-specific cell division factor.
Area of Science:
- Plant biology
- Developmental genetics
- Cell biology
Background:
- Floral organ development is crucial for plant reproduction.
- Proper cell division and cytokinesis are essential for meristem organization and organogenesis.
Purpose of the Study:
- To characterize the Arabidopsis tso1 mutant, which exhibits defects in floral organ formation.
- To investigate the cellular and molecular basis of the tso1 phenotype.
Main Methods:
- Phenotypic analysis of the tso1 mutant.
- Microscopic examination of floral meristem organization and cell structure.
- Assessment of DNA ploidy levels.
Main Results:
- The tso1 mutant forms undifferentiated callus tissue instead of floral organs.
- tso1 floral meristems show disorganized cell layers and irregular nuclei.
- Defects in mitosis, cytokinesis, and increased DNA ploidy were observed in tso1 cells.
Conclusions:
- TSO1 is essential for proper floral organogenesis in Arabidopsis.
- The tso1 mutation disrupts cell division and cytokinesis, leading to floral developmental defects.
- TSO1 may function as a floral-specific cell division component or have redundant functions in other tissues.
Related Concept Videos
02:19Morphogenesis
Plant morphogenesis—the development of a plant’s form and structure—involves several overlapping developmental processes, including growth and cell differentiation. Precursor cells differentiate into specific cell types, which are organized into the tissues and organ systems that make up the functional plant.
02:36Cells Coordinate Growth and Proliferation
Cell size is a significant factor impacting cellular design, function, and fitness. There exists some internal coordination by which cells double their masses before division, thus, achieving homeostasis. Coordination between cell growth and proliferation depends on the checkpoints in between cell cycle phases. Loss of coordination or failure in the checkpoint mechanism can drive the cell to uncontrolled growth and loss of cellular function. Like dividing cells that coordinate cellular growth,...
02:13Determining the Plane of Cell Division
Positioning the cell division plane is a critical step during development and cell differentiation, particularly during mitosis when the plane is essential for determining the size of the two daughter cells. The cell division plane is perpendicular to the plane of chromosome segregation, but different types of organisms have different cell division mechanisms to suit their morphology and function.
Animal cells
In animal cells, the cleavage furrow forms along the plane of cell division starting...
Animal cells
In animal cells, the cleavage furrow forms along the plane of cell division starting...
01:25Cell Signaling in Plants
Plant cells communicate to coordinate their cycle of growth, flowering and fruiting, and activities in roots, shoots, and leaves in response to the changing environmental conditions. Plant signaling is distinct from animal signaling. Plants primarily utilize enzyme-linked receptors, whereas the largest class of cell-surface receptors in animals are G-protein coupled receptors (GPCRs). Unlike animals, receptor tyrosine kinases are rare in plants. Instead, plants have a diverse class of...
02:13Determining the Plane of Cell Division
Positioning the cell division plane is a critical step during development and cell differentiation, particularly during mitosis when the plane is essential for determining the size of the two daughter cells. The cell division plane is perpendicular to the plane of chromosome segregation, but different types of organisms have different cell division mechanisms to suit their morphology and function.
Animal cells
In animal cells, the cleavage furrow forms along the plane of cell division starting...
Animal cells
In animal cells, the cleavage furrow forms along the plane of cell division starting...
01:27Molecular Factors Affecting Cell Division
Several external and internal factors influence the initiation and inhibition of cell division. For instance, the death of nearby cells or the release of human growth hormone (hGH) promotes cell division. In contrast, lack of hGH or crowding of cells can inhibit cell division.
Several proteins function as internal regulators to ensure each cell cycle stage is completed faithfully before proceeding to the next. Regulator molecules may act directly or influence the activity or production of other...
Several proteins function as internal regulators to ensure each cell cycle stage is completed faithfully before proceeding to the next. Regulator molecules may act directly or influence the activity or production of other...