Phototropism pp 121-130 | Cite as

A Simple Procedure to Observe Phototropic Responses in the Red Seaweed Pyropia yezoensis

  • Megumu Takahashi
  • Koji MikamiEmail author
Part of the Methods in Molecular Biology book series (MIMB, volume 1924)


The marine red seaweed Pyropia yezoensis exhibits phototropic responses in gametophyte and conchosporangia phases, but not in sporophytes. These responses are easily monitored with a simple culturing box that has one side open to allow for unilateral light irradiation within an incubator. Confirmation of phototropic responses is achieved by changing the direction of unilateral light irradiation via rotation of the culture dishes clockwise 90°.

Key words

Conchosporangium Gametophyte Phototropism Pyropia yezoensis Red seaweed Sporophyte 



We are grateful to the Marine Resources Research Center, Aichi Fisheries Research Institute for kindly providing P. yezoensis strain U-51. This work was supported in part by KAKENHI (15H04539).


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Faculty of Bio-IndustryTokyo University of AgricultureAbashiriJapan
  2. 2.Faculty of Fisheries SciencesHokkaido UniversityHakodateJapan
  3. 3.College of Fisheries and Life ScienceShanghai Ocean UniversityShanghaiChina

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