NDLI: Magnetic intensity affects cryptochrome-dependent responses in Arabidopsis thaliana

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Planta : Volume 225, Issue 2, January 2007

Planta : Volume 225, Issue 1, December 2006

Magnetic intensity affects cryptochrome-dependent responses in Arabidopsis thaliana

Content Provider	Springer Nature Link
Author	Ahmad, Margaret Galland, Paul Ritz, Thorsten Wiltschko, Roswitha Wiltschko, Wolfgang
Copyright Year	2006
Abstract	Cryptochromes are blue-light absorbing photoreceptors found in many organisms where they have been involved in numerous growth, developmental, and circadian responses. In Arabidopsis thaliana, two cryptochromes, CRY1 and CRY2, mediate several blue-light-dependent responses including hypocotyl growth inhibition. Our study shows that an increase in the intensity of the ambient magnetic field from 33–44 to 500 μT enhanced growth inhibition in A. thaliana under blue light, when cryptochromes are the mediating photoreceptor, but not under red light when the mediating receptors are phytochromes, or in total darkness. Hypocotyl growth of Arabidopsis mutants lacking cryptochromes was unaffected by the increase in magnetic intensity. Additional cryptochrome-dependent responses, such as blue-light-dependent anthocyanin accumulation and blue-light-dependent degradation of CRY2 protein, were also enhanced at the higher magnetic intensity. These findings show that higher plants are sensitive to the magnetic field in responses that are linked to cryptochrome-dependent signaling pathways. Because cryptochromes form radical pairs after photoexcitation, our results can best be explained by the radical-pair model. Recent evidence indicates that the magnetic compass of birds involves a radical pair mechanism, and cryptochrome is a likely candidate for the avian magnetoreception molecule. Our findings thus suggest intriguing parallels in magnetoreception of animals and plants that appear to be based on common physical properties of photoexcited cryptochromes.
Starting Page	615
Ending Page	624
Page Count	10
File Format	PDF
ISSN	00320935
Journal	Planta
Volume Number	225
Issue Number	3
e-ISSN	14322048
Language	English
Publisher	Springer-Verlag
Publisher Date	2006-09-06
Publisher Place	Berlin/Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Anthocyanin Arabidopsis Cryptochromes Cryptochrome stability Hypocotyl growth Magnetic field Radical-pair mechanism Forestry Ecology Agriculture Plant Sciences
Content Type	Text
Resource Type	Article
Subject	Genetics Plant Science

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Magnetic field effects in arabidopsis thaliana cryptochrome-1 (2007).

Effect of magnetic fields on cryptochrome-dependent responses in

Effect of magnetic fields on cryptochrome-dependent responses in Arabidopsis thaliana

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Corrigendum: Low-Light Dependence of the Magnetic Field Effect on Cryptochromes: Possible Relevance to Plant Ecology

Magnetic intensity affects cryptochrome-dependent responses in Arabidopsis thaliana

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