TY - JOUR
T1 - Ultrastructural study of limb bud development in green turtles Chelonia mydas
AU - Al-Mukhaini, Nawal
AU - Ba-Omar, Taher
AU - Mahmoud, Ibrahim
PY - 2012
Y1 - 2012
N2 - Morphological changes during the embryonic development of limbs of the green turtle, Chelonia mydas, were studied during the entire period of incubation, using transmission and scanning electron microscopy (TEM and SEM). Limb buds were first observed at Stage 2. At that stage, the tip was covered with an apical ectodermal ridge (AER) which began to regress at Stage 6. Associated with AER was the presence of the mesenchymal cells which, consequently, differentiated into muscles, cartilage and bones. The gross features of the skeletal development appeared as a condensation of the cartilaginous structures in the proximal distal region of the limbs. The primordial digits were gradually enclosed by hard keratinized webbed skin. The increase in rate of ossification and skin pigmentation was correlated with the growth of the limbs. The development of the limbs was closely related to the transitional appearance of mucus secretion from the epidermis.
AB - Morphological changes during the embryonic development of limbs of the green turtle, Chelonia mydas, were studied during the entire period of incubation, using transmission and scanning electron microscopy (TEM and SEM). Limb buds were first observed at Stage 2. At that stage, the tip was covered with an apical ectodermal ridge (AER) which began to regress at Stage 6. Associated with AER was the presence of the mesenchymal cells which, consequently, differentiated into muscles, cartilage and bones. The gross features of the skeletal development appeared as a condensation of the cartilaginous structures in the proximal distal region of the limbs. The primordial digits were gradually enclosed by hard keratinized webbed skin. The increase in rate of ossification and skin pigmentation was correlated with the growth of the limbs. The development of the limbs was closely related to the transitional appearance of mucus secretion from the epidermis.
KW - Chelonia mydas
KW - Green turtle
KW - Limb bud development
KW - Turtle embryology
KW - Ultrastructure
UR - http://www.scopus.com/inward/record.url?scp=84858990303&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84858990303&partnerID=8YFLogxK
U2 - 10.3724/SP.J.1245.2012.00069
DO - 10.3724/SP.J.1245.2012.00069
M3 - Article
AN - SCOPUS:84858990303
SN - 2095-0357
VL - 3
SP - 69
EP - 78
JO - Asian Herpetological Research
JF - Asian Herpetological Research
IS - 1
ER -