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PMID: 28784810 Published · ppublish English Journal Article Research Support, Non-U.S. Gov't

Phototropin perceives temperature based on the lifetime of its photoactivated state.

Proceedings of the National Academy of Sciences of the United States of America ·Vol. 114 ·No. 34 ·2017-00-22 ·Pages 9206-9211

Fujii Y, Tanaka H, Konno N, Ogasawara Y, Hamashima N, Tamura S, Hasegawa S, Hayasaki Y, Okajima K, Kodama Y

Abstract

Living organisms detect changes in temperature using thermosensory molecules. However, these molecules and/or their mechanisms for sensing temperature differ among organisms. To identify thermosensory molecules in plants, we investigated chloroplast positioning in response to temperature changes and identified a blue-light photoreceptor, phototropin, that is an essential regulator of chloroplast positioning. Based on the biochemical properties of phototropin during the cellular response to light and temperature changes, we found that phototropin perceives temperature based on the temperature-dependent lifetime of the photoactivated chromophore. Our findings indicate that phototropin perceives both blue light and temperature and uses this information to arrange the chloroplasts for optimal photosynthesis. Because the photoactivated chromophore of many photoreceptors has a temperature-dependent lifetime, a similar temperature-sensing mechanism likely exists in other organisms. Thus, photoreceptors may have the potential to function as thermoreceptors.

Keywords
chloroplast movement dark reversion photoreceptor thermal reversion thermosensor
MeSH Terms
Chloroplasts/genetics,metabolism,radiation effects Hepatophyta/genetics,metabolism,radiation effects Light Photosynthesis Phototropins/genetics,metabolism Plant Proteins/genetics,metabolism Temperature
Chemicals
Phototropins Plant Proteins
Authors & Affiliations
10 authors, click to expand affiliations / ORCID
Fujii Yuta
Center for Bioscience Research and Education, Utsunomiya University, Tochigi 321-8505, Japan.
Tanaka Hiroyuki
Center for Bioscience Research and Education, Utsunomiya University, Tochigi 321-8505, Japan. | Collaboration Center for Research and Development, Utsunomiya University, Tochigi 321-8585, Japan.
Konno Naotake
Faculty of Agriculture, Utsunomiya University, Tochigi 321-8505, Japan.
Ogasawara Yuka
Center for Bioscience Research and Education, Utsunomiya University, Tochigi 321-8505, Japan.
Hamashima Noriko
Center for Bioscience Research and Education, Utsunomiya University, Tochigi 321-8505, Japan.
Tamura Saori
Center for Bioscience Research and Education, Utsunomiya University, Tochigi 321-8505, Japan.
Hasegawa Satoshi
Graduate School of Engineering, Utsunomiya University, Tochigi 321-8585, Japan. | Center for Optical Research and Education, Utsunomiya University, Tochigi 321-8585, Japan.
Hayasaki Yoshio
Center for Optical Research and Education, Utsunomiya University, Tochigi 321-8585, Japan.
Okajima Koji
Graduate School of Science and Technology, Keio University, Kanagawa 223-8522, Japan.
Kodama Yutaka
Center for Bioscience Research and Education, Utsunomiya University, Tochigi 321-8505, Japan; kodama@cc.utsunomiya-u.ac.jp.
Conflict of Interest

The authors declare no conflict of interest.

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Article Info
Journal
Proceedings of the National Academy of Sciences of the United States of America
Abbr.
Proc Natl Acad Sci U S A
ISSN
1091-6490
DOI
10.1073/pnas.1704462114
Email
kodama@cc.utsunomiya-u.ac.jp
Published
2017-00-22
Epub
2017-00-07
Pages
9206-9211
Language
English
Region
United States
NLM ID
7505876
PMCID
PMC5576800
Subset
IM
External Links
PubMed source DOI: 10.1073/pnas.1704462114 PMC Full Text View journal details
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