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Life Under the Sun$
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Peter A. Ensminger

Print publication date: 2001

Print ISBN-13: 9780300088045

Published to Yale Scholarship Online: October 2013

DOI: 10.12987/yale/9780300088045.001.0001

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PRINTED FROM YALE SCHOLARSHIP ONLINE (www.yale.universitypressscholarship.com). (c) Copyright Yale University Press, 2022. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in YSO for personal use.date: 28 June 2022

High Hopes for Hypericin

High Hopes for Hypericin

(p.128) 11 High Hopes for Hypericin
Life Under the Sun

Pete A. Ensminger

Yale University Press

This chapter discusses Saint John's wort and hypericin, their therapeutic effects, and the functions of naturally occurring hypericin-like pigments in Stentor coeruleus and Blepharisma japonicum. The chapter explores the mechanism by which these pigments control cellular movements and light-induced movement responses such as photophobic response, photokineses, and phototaxes. This chapter also discusses behavioral responses to light, biology of ciliates, and chemical pathways that Stentor and Blepharisma use to convert light signals received by their pigments into physiological movement responses.

Keywords:   Saint John's wort, hypericin, photophobic response, photokineses, phototaxes, ciliates

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