ISSN:
1432-0878
Keywords:
Nematode
;
Cuticle
;
Plasmalemma
;
Cuticle formation
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Medicine
Notes:
Summary The cuticle of fourth larval stage N. dubius consists of a limiting membrane, outer and inner cortices, matrix, and two fibrous layers. The adult cuticle displays a limiting membrane and outer cortex, but the remainder of the cuticle is not subdivided into discrete layers. The limiting membrane is triple-layered, and its filamentous surface coat binds Thorotrast (pH 2.1). Time sequence studies on the genesis of the limiting membrane indicate that it is a plasmalemma transformed from the cuticle-hypodermis membrane. The cortex and matrix of the adult cuticle form by differentiation of hypodermis cytoplasm subjacent to the cuticle-hypodermis membrane. The fiber layers form under the matrix by intrahypodermal secretion. The cuticle is thus intrahypodermal. The cuticle-hypodermis membrane is discontinuous in fourth larval stage and adult worms, and direct communication is established between the cuticle and hypodermis.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00309730
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