Asset Details
Do you wish to reserve the book?
Molecular and cellular changes associated with the evolution of novel jaw muscles in parrots
Hey, we have placed the reservation for you!
By the way, why not check out events that you can attend while you pick your title.
Oops! Something went wrong.
Looks like we were not able to place the reservation. Kindly try again later.
Are you sure you want to remove the book from the shelf?
Molecular and cellular changes associated with the evolution of novel jaw muscles in parrots
Do you wish to request the book?
Molecular and cellular changes associated with the evolution of novel jaw muscles in parrots
Please be aware that the book you have requested cannot be checked out. If you would like to checkout this book, you can reserve another copy
We have requested the book for you!
Your request is successful and it will be processed during the Library working hours. Please check the status of your request in My Requests.
Oops! Something went wrong.
Looks like we were not able to place your request. Kindly try again later.
Journal Article
Molecular and cellular changes associated with the evolution of novel jaw muscles in parrots
2013
Overview
Vertebrates have achieved great evolutionary success due in large part to the anatomical diversification of their jaw complex, which allows them to inhabit almost every ecological niche. While many studies have focused on mechanisms that pattern the jaw skeleton, much remains to be understood about the origins of novelty and diversity in the closely associated musculature. To address this issue, we focused on parrots, which have acquired two anatomically unique jaw muscles: the ethmomandibular and the pseudomasseter. In parrot embryos, we observe distinct and highly derived expression patterns for Scx, Bmp4, Tgfβ2 and Six2 in neural crest-derived mesenchyme destined to form jaw muscle connective tissues. Furthermore, immunohistochemical analysis reveals that cell proliferation is more active in the cells within the jaw muscle than in surrounding connective tissue cells. This biased and differentially regulated mode of cell proliferation in cranial musculoskeletal tissues may allow these unusual jaw muscles to extend towards their new attachment sites. We conclude that the alteration of neural crest-derived connective tissue distribution during development may underlie the spatial changes in jaw musculoskeletal architecture found only in parrots. Thus, parrots provide valuable insights into molecular and cellular mechanisms that may generate evolutionary novelties with functionally adaptive significance.
Publisher
The Royal Society
Subject
/ Animals
/ Bone Morphogenetic Protein 4 - metabolism
/ Chick Embryo - anatomy & histology
/ Chickens - anatomy & histology
/ Embryo, Nonmammalian - anatomy & histology
/ Embryo, Nonmammalian - embryology
/ Embryo, Nonmammalian - metabolism
/ Fibroblast Growth Factor 8 - metabolism
/ Gene Expression Regulation, Developmental
/ Image Processing, Computer-Assisted
/ Masticatory Muscles - anatomy & histology
/ Masticatory Muscles - embryology
/ Masticatory Muscles - metabolism
/ Mesoderm - anatomy & histology
/ Parrots
