Photostasis and Related Phenomena
Over the weekend of 21-23 February 1997, a small group gathered in Tallahassee, Florida, at the invitation of Ted Williams, to discuss "photo stasis and related topics." The majority of participants were former students and colleagues of Ted's, but an occ
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Photostasis and Related Phenomena Edited by
Theodore P. Williams and Anne B. Thistle Florida State University Tallahassee, FkJrida
Springer Science+Business Media, LLC
L i b r a r y o f C o n g r e s s C a t a l o g i n g - 1 n - P u b l i c a t i o n Data
P h o t o s t a s i s and r e l a t e d phenomena / e d i t e d by Theodore P. W i l l i a m s and Anne B. Th i s t 1 e . p. cm. " P r o c e e d i n g s of the N e u r o s c i e n c e Program Sympo.sium on P h o t o s t a s i s and R e l a t e d T o p i c s , h e l d F e b r u a r y 2 1 - 2 3 , 1997, in T a l l a h a s s e e , F l o r i d a " — T . p . verso. I n c l u d e s b i b l i o g r a p h i c a l r e f e r e n c e s and i n d e x . ISBN 978-1-4899-1551-1 2. Rhodopsin—Congresses.. 1. P h o t o r e c e p t o r s — C o n g r e s s e s . I. W i l l i a m s , Theodore P. I I . T h i s t l e , Anne B. III. Neuroscience Program Symposium on P h o t o s t a s i s and R e l a t e d T o p i c s (1997 : Ta11ahassee , F l a . ) QP481.P53 1998 573.8'836~dc21 97-52808 CIP
Proceedings of the Neuroscience Program Symposium on Photostasis and Related Topics, held February 21-23, 1997, in Tallahassee, Florida
ISBN 978-1-4899-1551-1 ISBN 978-1-4899-1549-8 (eBook) DOI 10.1007/978-1-4899-1549-8
© Springer Science+Business Media New York 1998 Originally published by Plenum Press, New York in 1998 Softcover reprint of the hardcover 1st edition 1998 http://www.plenum.com 10 9 8 7 6 5 4 3 2 1 All rights reserved No part of this book may be reproduced, stored in a retrieval system, or transmitted in any form or by any means, electronic, mechanical, photocopying, microfilming, recording, or otherwise, without written permission from the Publisher
To the Memory of Werner K. Noell (1913-1992)
Scientist, Colleague, and Friend
v
FOREWORD
Over the weekend of 21-23 February 1997, a small group gathered in Tallahassee, Florida, at the invitation of Ted Williams, to discuss "photo stasis and related topics." The majority of participants were former students and colleagues of Ted's, but an occasional outsider such as myself was generously included. The papers presented there are collected in this volume. The theory of photo stasis was first outlined in a landmark paper by John Penn and Ted, published in 1986 in Experimental Eye Research. They provided compelling data showing that, in the albino rat eye, levels of rhodopsin, outer-segment length, rhodopsin regeneration rate, and even, perhaps, rhodopsin packing density all depend on the levels of cyclic illumination (12 hours light, 12 hours dark) in which the animal was reared. So, for example, there is fourfold less rhodopsin in a retinal extract derived from an animal reared at 400 lux than in an extract from the retina of an animal reared at 3 lux. Animals reared at intermediate levels of light show intermediate amounts of rhodopsin that are correlated with illumination level. What these data immediately suggested is that the photoreceptor cell can adjust its photon-catching ability in response to the levels of light in w
