Biol. Bull. Sign up for etocs!
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Biol Bull 127: 511-525. (December 1964)
© 1964 Marine Biological Laboratory
This Article
Right arrow Full Text (PDF) Free
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Citing Articles
Right arrow Citing Articles via HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by WILLIAMS, C. M.
Right arrow Articles by ADKISSON, P. L.
Right arrow Search for Related Content
PubMed
Right arrow Articles by WILLIAMS, C. M.
Right arrow Articles by ADKISSON, P. L.

PHYSIOLOGY OF INSECT DIAPAUSE. XIV. AN ENDOCRINE MECHANISM FOR THE PHOTOPERIODIC CONTROL OF PUPAL DIAPAUSE IN THE OAK SILKWORM, ANTHERAEA PERNYI

CARROLL M. WILLIAMS 1 and PERRY L. ADKISSON 1

1 The Biological Laboratories, Harvard University, Cambridge 38, Massachusetts

1. In the oak silkworm,Antheraea pernyi, photoperiod controls not only the onset of pupal diapause (as previously demonstrated by Tanaka) but also the termination of pupal diapause.

2. At 25° C., short-day conditions (4-to 12-hour photophases) strongly inhibit the termination of pupal diapause; maximal inhibition is by a 12-hour photophase.

3. Long-day conditions (15-to 18-hour photophases) promote the termination of diapause; a 17-hour photophase is the most effective.

4. A 14-hour photophase is transitional between short-days which sustain diapause and long-days which terminate diapause.

5. By various experimental maneuvers, sensitivity to photoperiod was localized in the head-end of the pupa. Short-day illumination of the head-end inhibited the termination of diapause even when the hind-end was exposed to long-day conditions. In like manner, long-day illumination of the head-end was fully effective even when the abdomen received short-day illumination.

6. When the brain was removed from the head and implanted into the tip of the abdomen, the sensitivity to photoperiod was thereby shifted to the hind-end.

7. Additional experiments indicated that the brain is the vehicle for the reception and implementation of photoperiod signals. Brainless pupae are insensitive to photoperiod, while normal pupae are sensitive to photoperiod during the period when development is dependent on the secretion of brain hormone. When this period terminates about 60 hours after the initiation of adult development, photoperiod has lost all its effectiveness.

8. It is concluded that photoperiod acts directly on the brain, itself, to modulate the secretion of brain hormone and thereby to control the termination of pupal diapause.




This article has been cited by other articles:


Home page
 ScienceHome page
A. Q. VAN ZON, W. P. J. OVERMEER, and A. VEERMAN
Carotenoids Function in Photoperiodic Induction of Diapause in a Predacious Mite
Science, September 4, 1981; 213(4512): 1131 - 1133.
[Abstract] [PDF]

Home page
 ScienceHome page
J. W. Truman
Temperature Sensitive Programming of the Silkmoth Flight Clock: A Mechanism for Adapting to the Seasons
Science, November 16, 1973; 182(4113): 727 - 729.
[Abstract] [PDF]

Home page
 ScienceHome page
D. E. Aiken
Photoperiod, Endocrinology and the Crustacean Molt Cycle
Science, April 11, 1969; 164(3876): 149 - 155.
[PDF]


HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 1964 by the Marine Biological Laboratory.