Date of Award
1-1-2013
Document Type
Masters Thesis
Degree Name
M.S.
Organizational Unit
College of Natual Science and Mathematics
First Advisor
James T. Blankenship, Ph.D.
Second Advisor
Dinah Loerke
Third Advisor
Scott Barbee
Keywords
Drosophila, Convergent extension, F-actin
Abstract
Convergent extension is a process that occurs in the development of a wide variety of organisms, including gastrulation in the Drosophila embryo to begin to lay out the adult body plan. In fly embryos, this is known as germband extension and is mainly driven by cell intercalation or neighbor exchange by planar polarized cell-cell interface contraction to shorten the tissue along the dorsal-ventral axis. In this thesis, I show that interface contraction consists of phases of fast interface shortening and intervals of stable interface size. My data also suggests that regulation of F-actin aggregates at these shrinking interfaces is important for appropriate biphasic interface contraction. Knock down of two F-actin regulating proteins, Dpod1 and coronin, results in aberrant interface dynamics and severe disruption of germband extension. Close examination of interface and F-actin aggregate dynamics in coronin knock down reveals that coronin is required for appropriate F-actin globule formation and interface contraction.
Publication Statement
Copyright is held by the author. User is responsible for all copyright compliance.
Rights Holder
Ashley Motlong
Provenance
Received from ProQuest
File Format
application/pdf
Language
en
File Size
62 p.
Recommended Citation
Motlong, Ashley M., "Regulation of Actin Dynamics During Drosophila Germband Extension" (2013). Electronic Theses and Dissertations. 457.
https://digitalcommons.du.edu/etd/457
Copyright date
2013
Discipline
Developmental biology, Cellular biology