Abd-B also non-cell-autonomously controls critical features within the niche, including centrosome orientation and division rates of germline stem cells.
One of the characteristics of the relationship between stem cells and their niche is the orientation of cell-division.
Beyond this, we corroborate and extend several observations in the transition literature, including the semi-coherent nature of the regime, the social construction of the landscape, and the prevalence of fit-and-conform orientations within niche empowerment strategies.
During division, stem cells ensure that only one progeny can be in contact with the stem cell niche by keeping the perpendicular orientation of their mitotic spindle to the niche surface.
Mr. Brooks said the most successful niche sites pair people by race, sexual orientation or religion.
As the cells enter mitosis, the second centrosome localizes to the side of the cell opposite the anchored centrosome, ensuring correct spindle orientation with respect to either the niche or the polarity axis.
Floral orientation may also be strongly affected by niche features such as the presence and abundance of various types of pollinators.
Apparently, the orientation of the division plane within the niche is responsible for maintaining this diversity; planar division generates two identical daughter cells, while apical-basal division generates asymmetric cell fates.
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It was not until the mitotic spindle had fully formed that we observed a consistent orientation of the centrosomes relative to the spectrosome and niche (see below).
We conclude that centrosomes are not required for the proper orientation of the spindle relative to the spectrosome or niche in female GSCs or for the proper orientation of the spindles relative to the fusome in mitotic cysts.
