Atrial gland cells synthesize a family of peptides that can induce egg laying inAplysia

1985 ◽  
Vol 156 (1) ◽  
pp. 43-55 ◽  
Author(s):  
Gregg T. Nagle ◽  
Sherry D. Painter ◽  
Katrina L. Kelner ◽  
James E. Blankenship
Keyword(s):  
Egg Laying ◽  
Gland Cells ◽  
Atrial Gland

scholarly journals Evidence for the expression of three genes encoding homologous atrial gland peptides that cause egg laying in Aplysia.

1986 ◽  
Vol 261 (17) ◽  
pp. 7853-7859
Author(s):  
G T Nagle ◽  
S D Painter ◽  
J E Blankenship ◽  
J D Dixon ◽  
A Kurosky
Keyword(s):  
Egg Laying ◽  
Atrial Gland ◽  
Genes Encoding

Atrial gland induction of the egg-laying response inAplysia californica

1978 ◽  
Vol 128 (1) ◽  
pp. 67-70 ◽  
Author(s):  
S. Arch ◽  
T. Smock ◽  
R. Gurvis ◽  
C. McCarthy
Keyword(s):  
Egg Laying ◽  
Atrial Gland

Ovarian activity during the annual reproductive cycle and nesting cycle of a wild avian species, the pied myna (Sturnus contra contra)

1987 ◽  
Vol 65 (4) ◽  
pp. 958-966
Author(s):  
S. K. Gupta ◽  
B. R. Maiti
Keyword(s):  
Reproductive Cycle ◽  
Gland Cell ◽  
Cell Mass ◽  
Egg Laying ◽  
Nest Building ◽  
Ovarian Activity ◽  
Annual Reproductive Cycle ◽  
Ovarian Weight ◽  
Gland Cells ◽  
Thecal Gland

Ovarian activity was studied during the annual reproductive cycle and nesting cycle in the Indian pied myna (Sturnus contra contra). The investigation was carried out on the basis of gravimetric, histological (gross and quantitative), and histochemical (3β-hydroxysteroid dehydrogenase and lipids) studies. In the ovary of the pied myna, four types of healthy follicles (primordial, small developing, large developing, and yolky) were recognized; the stroma showed gland cells. Steroidogenic activity was marked in the theca and granulosa of the follicles, and it altered with the growth of the follicles. The probable source of stromal gland cells is discussed. The ovarian activity changed over the course of the year with four distinct phases, viz., progressive (February to April), breeding (May), regression (June to July), and nonbreeding (August to January) phases. Ovarian weight, largest follicular diameter, populations of larger follicles, and thecal gland cell mass increased gradually from February through April, became maximal in May, decreased in June and July, and became minimal during August through January. Yolky follicles developed only in May. Stromal gland cell mass was abundant in March, decreased from April to June, was almost absent from July to September, reappeared in October, and gradually increased afterwards. Steroidogenic activity of the thecal and stromal gland cells also changed with the annual ovarian cycle; it was absent during July through September and reappeared in October. The granulosa cells showed steroid activity only in May. During the nesting cycle, ovarian activity increased rapidly from early nest-building to egg-laying periods and declined during incubation and nestling periods; this was evident from changes in ovarian weight, largest follicular diameter, thecal gland mass, and populations of larger follicles. Yolky follicles were seen during late nest-building, egg-laying, and incubation periods. Stromal gland cell mass decreased gradually during the nesting cycle. 3β-Hydroxysteroid dehydogenase activity was maximal in the nest-building period.

Purification and characterization of Aplysia atrial gland secretory granules containing egg-laying prohormone-related peptides

Peptides ◽  
1994 ◽  
Vol 15 (1) ◽  
pp. 101-108 ◽  
Author(s):  
Gregg T. Nagle ◽  
Walter R.A. Van Heumen ◽  
Mahdy A. El-Hamzawy ◽  
Alexander Kurosky
Keyword(s):  
Secretory Granules ◽  
Egg Laying ◽  
Purification And Characterization ◽  
Atrial Gland

Peptide products of the atrial gland are not water-borne reproductive pheromones during egg laying in Aplysia

Peptides ◽  
2003 ◽  
Vol 24 (8) ◽  
pp. 1117-1122 ◽  
Author(s):  
David-B.G. Akalal ◽  
Scott F. Cummins ◽  
Sherry D. Painter ◽  
Gregg T. Nagle
Keyword(s):  
Egg Laying ◽  
Atrial Gland ◽  
Water Borne

Expression and genetic variation of theAplysia egg-laying hormone gene family in the atrial gland

1997 ◽  
Vol 2 (4) ◽  
pp. 261-271 ◽  
Author(s):  
Alexander Kurosky ◽  
Edwin L. Gorham ◽  
Walter R. A. Van Heumen ◽  
Anna T. Garcia ◽  
John S. Smith ◽  
...  
Keyword(s):  
Genetic Variation ◽  
Gene Family ◽  
Egg Laying ◽  
Atrial Gland

Ultrastructural localization of egg-laying prohormone-related peptides in the atrial gland of Aplysia californica

1995 ◽  
Vol 279 (1) ◽  
pp. 13-24 ◽  
Author(s):  
Walter R. A. van Heumen ◽  
Gregg T. Nagle ◽  
Alexander Kurosky
Keyword(s):  
Aplysia Californica ◽  
Ultrastructural Localization ◽  
Egg Laying ◽  
Atrial Gland
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