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Title: Sturgeon gut development: a unique yolk utilization strategy among vertebrates
In vertebrates, maternally supplied yolk is typically used in one of two ways: either intracellularly by endodermal cells or extracellularly via the yolk sac. This study delves into the distinctive gut development in sturgeons, which are among the most ancient extant fish groups, contrasting it with that of other vertebrates. Our observations indicate that while sturgeon endodermal cells form the archenteron (i.e., the primitive gut) dorsally, the floor of the archenteron is uniquely composed of extraembryonic yolk cells (YCs). As development progresses, during neurulation, the archenteric cavity inflates, expands laterally, and roofs a semicircle of YCs. By the pharyngula stage, the cavity fully encompasses the YC mass, which begins to be digested at the hatching stage. This suggests a notable deviation in sturgeon gut development from that in other vertebrates, as their digestive tract initiates its function by processing endogenous nutrition even before external feeding begins. Our findings highlight the evolutionary diversity of gut development strategies among vertebrates and provide new insights into the developmental biology of sturgeons.  more » « less
Award ID(s):
2029216
PAR ID:
10552575
Author(s) / Creator(s):
; ; ; ; ; ; ; ;
Publisher / Repository:
Frontiers Media
Date Published:
Journal Name:
Frontiers in Cell and Developmental Biology
Volume:
12
ISSN:
2296-634X
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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