Sperm bauplan and function and underlying processes of sperm formation and selection
Maria Eugenia Teves, Eduardo R. S. Roldan
TL;DR
This paper explores the structure and function of sperm cells, focusing on the evolutionary and molecular mechanisms behind their diversity.
Contribution
The paper provides a comprehensive analysis of the adaptive and mechanistic origins of sperm diversity.
Findings
Sperm cells show significant structural and functional diversity across species.
Selective forces and molecular mechanisms in the testis drive sperm differentiation and variation.
Understanding these mechanisms can explain male reproductive success and evolutionary adaptations.
Abstract
The spermatozoon is a highly differentiated and polarized cell, with two main structures: the head, containing a haploid nucleus and the acrosomal exocytotic granule, and the flagellum, which generates energy and propels the cell; both structures are connected by the neck. The sperm’s main aim is to participate in fertilization, thus activating development. Despite this common bauplan and function, there is an enormous diversity in structure and performance of sperm cells. For example, mammalian spermatozoa may exhibit several head patterns and overall sperm lengths ranging from ∼30 to 350 µm. Mechanisms of transport in the female tract, preparation for fertilization, and recognition of and interaction with the oocyte also show considerable variation. There has been much interest in understanding the origin of this diversity, both in evolutionary terms and in relation to mechanisms…
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Taxonomy
TopicsSperm and Testicular Function · Animal Behavior and Reproduction · Insect and Arachnid Ecology and Behavior