Physiological Properties of Gene Arrangement Carriers in Drosophila persimilis. I. Egg-Laying Capacity and Longevity of Adults

Evolution ◽  
1952 ◽  
Vol 6 (2) ◽  
pp. 208 ◽  
Author(s):  
Eliot B. Spiess ◽  
Melvin Ketchel ◽  
Barbaranne P. Kinne
Keyword(s):  
Egg Laying ◽  
Gene Arrangement ◽  
Physiological Properties ◽  
Drosophila Persimilis

Neuroendocrine bag cells of Aplysia are activated by bag cell peptide-containing neurons in the pleural ganglion

1989 ◽  
Vol 61 (6) ◽  
pp. 1142-1152 ◽  
Author(s):  
R. O. Brown ◽  
S. M. Pulst ◽  
E. Mayeri
Keyword(s):  
Lucifer Yellow ◽  
Cell Activity ◽  
Feedback Mechanism ◽  
Egg Laying ◽  
Electrophysiological Properties ◽  
Physiological Properties ◽  
Positive Feedback Mechanism ◽  
Bag Cells ◽  
Small Clusters

1. The generation of egg-laying behavior in the marine mollusk Aplysia involves a prolonged burst discharge in the neuroendocrine bag cells, which secrete neuropeptides derived from the egg-laying hormone/bag cell peptide (ELH/BCP) precursor protein. 2. Besides the bag cells, which are located in the abdominal ganglion, small clusters of neurons in the cerebral and pleural ganglia also express the ELH/BCP neuropeptides. We made intracellular recordings from 32 of these ELH/BCP cells in right pleural ganglia, in 18 preparations, to characterize their physiological properties and their functional relationship to the bag cells. 3. The identification of these ELH/BCP cells was confirmed by pressure injection of Lucifer yellow and subsequent immunocytochemical processing for alpha-BCP immunoreactivity. 4. The basic electrophysiological properties of the pleural ELH/BCP cells were similar to those of the bag cells. These pleural cells were directly demonstrated to be electrically coupled, and direct intracellular stimulation of individual pleural ELH/BCP cells initiated prolonged, synchronous burst discharges in the entire cluster through a positive feedback mechanism. 5. Burst discharges elicited in the pleural ELH/BCP cells consistently initiated burst discharges in the bag cells. Bag cell burst discharges were less effective in initiating burst discharges in the pleural ELH/BCP cells, indicating that there were reciprocal but asymmetrical connections. 6. The results show that the pleural ELH/BCP cells are functionally coupled to the bag cells. They support the hypothesis that the pleural ELH/BCP cells are part of the descending pathway that initiates bag cell activity and egg-laying behavior, in vivo.

Mating Speed Control by Gene Arrangement Carriers in Drosophila persimilis

Evolution ◽  
1964 ◽  
Vol 18 (3) ◽  
pp. 430 ◽  
Author(s):  
Eliot B. Spiess ◽  
Bozena Langer
Keyword(s):  
Speed Control ◽  
Gene Arrangement ◽  
Mating Speed ◽  
Drosophila Persimilis

Mating Propensity of Gene Arrangement Carriers From a Redwoods Population of Drosophila persimilis

Evolution ◽  
1971 ◽  
Vol 25 (3) ◽  
pp. 461 ◽  
Author(s):  
Eliot B. Spiess ◽  
Richard N. Sherwin ◽  
Tina Yacher
Keyword(s):  
Gene Arrangement ◽  
Mating Propensity ◽  
Drosophila Persimilis
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