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Morphological characterization of cell death during the ovary differentiation in worker honey bee
Rejane Daniele Reginato1, Carminda Da Cruz-Landim
1Departamento de Biologia, Instituto de Biociências, Universidade Estadual Paulista (UNESP), Rio Claro, SP, 13506-900, Brasil.
Abstract:
Cell death that occurs during ovary differentiation in the honeybee worker's larval development accounts for ovariole reabsorption. From a morphological standpoint, three modes of death were detected. Germinative cells in the ovarioles die by an apoptotic-like process, whereas the somatic cells die by an autophagic process, type II cell death; and during pupation, stromatic and ovarian capsular cells die through cytoplasmic disintegration, releasing their components into the hemolymph. These modes of cell death are in part determined by the pattern of tissue organization within which the cell occurs.
Insights
Honeybee ovary differentiation involves distinct cell death mechanisms. Germinative cells undergo apoptosis-like death, somatic cells use autophagy, and other cells disintegrate, aiding ovariole reabsorption.
Area of Science:
- Developmental Biology
- Cell Biology
- Insect Physiology
Background:
- Ovary differentiation is crucial for insect reproduction.
- Honeybee worker ovaries undergo reabsorption during larval development.
- Understanding cell death mechanisms is key to developmental processes.
Purpose of the Study:
- To investigate the morphological modes of cell death during honeybee worker ovary differentiation.
- To correlate cell death patterns with tissue organization and ovariole reabsorption.
Main Methods:
- Morphological analysis of honeybee worker larvae.
- Observation of cell death processes within developing ovarioles.
Main Results:
- Three distinct cell death modes were identified: apoptotic-like death in germinative cells, autophagic (Type II) death in somatic cells, and cytoplasmic disintegration in stromatic/capsular cells.
- Cell death modes are influenced by the specific tissue organization within the ovary.
- These processes contribute to the overall reabsorption of ovarioles.
Conclusions:
- Honeybee ovary differentiation employs diverse, spatially regulated cell death pathways.
- Apoptosis-like, autophagic, and disintegrative cell death are integral to ovariole reabsorption.
- Tissue architecture plays a significant role in determining the mode of cell death during development.