公开(公告)号：US20190223397A1

公开(公告)日：2019-07-25

申请号：US16329328

申请日：2017-08-17

Applicant: SHOWA DENKO K.K.

Inventor： Yoko MATSUMOTO ,  Masaharu ISHIKURA ,  Hiroshi SUZUKI

IPC: A01G33/00 ,  C12N1/12 ,  C12M1/00

Abstract: The present invention provides a method for culturing photosynthetic microalgae with which xanthophyll can be obtained more efficiently than before. The method for culturing photosynthetic microalgae of the present invention comprises: step (A) of increasing the number of cells in which light irradiation (a) of encysted photosynthetic microalgae containing xanthophyll is performed; and step (B) of increasing the xanthophyll content in photosynthetic microalgae in which light irradiation (b) of the photosynthetic microalgae subjected to the step (A) of increasing the number of cells is performed, wherein the light irradiation (a) is light irradiation using as a light source an LED including blue light having a wavelength of 400 to 490 nm, the light irradiation (b) is light irradiation using as a light source an LED including blue light having a wavelength of 400 to 490 nm and an LED including red light having a wavelength of 620 to 690 nm, and the light irradiation (a) and the light irradiation (b) are light irradiations using different light sources.

公开(公告)号：US20190194598A1

公开(公告)日：2019-06-27

申请号：US16329483

申请日：2017-08-17

Applicant: SHOWA DENKO K.K.

Inventor： Yoko MATSUMOTO ,  Masaharu ISHIKURA ,  Hiroshi SUZUKI

IPC: C12N1/12 ,  C12P23/00 ,  A01G33/00 ,  A01G7/04

CPC classification number: C12N1/12 ,  A01G7/045 ,  A01G33/00 ,  C12P7/26 ,  C12P23/00

Abstract: The present invention provides a method for culturing photosynthetic microalgae with which xanthophyll can be obtained more efficiently than before. The culture method of the present invention comprises a step of performing light irradiation of encysted photosynthetic microalgae containing xanthophyll in an amount of 3 to 9% by mass in terms of a dry mass. Preferably, in the step of performing light irradiation, the xanthophyll content in photosynthetic microalgae is kept at 2% by mass or more in terms of a dry mass. Preferably, the step of performing light irradiation includes step (A) of increasing the number of cells in which light irradiation (a) is performed; and step (B) of increasing the xanthophyll content in photosynthetic microalgae in which light irradiation (b) of the photosynthetic microalgae subjected to the step (A) of increasing the number of cells is performed.