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Real-time photoprotective response of xanthophyll pigments and Mycosporine-like amino acids of Porosira glacialis (Bacillariophyceae)

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Title
Real-time photoprotective response of xanthophyll pigments and Mycosporine-like amino acids of Porosira glacialis (Bacillariophyceae)
Other Titles
규조류 Porosiara glacialis의 광보호 크산토필 색소와 자외선 흡수물질의 시간별 생성 속도에 관한 연구
Authors
Ha, Sun-Yong
Kang, Sung-Ho
Min, Jun-Oh
Shin, Kyung-Hoon
Chung, Kyung Ho
Mi-Ok Park
Keywords
Mycosporine-like amino acids; Porosira glacialis; photoprotective response; pigment
Issue Date
2012
Citation
Ha, Sun-Yong, et al. 2012. Real-time photoprotective response of xanthophyll pigments and Mycosporine-like amino acids of Porosira glacialis (Bacillariophyceae). 극지연구소. 극지연구소. 2012.05.22~.
Abstract
This study is investigation of the newly synthesis of photoprotective compounds by Porosira glacialis in real time using a 13C tracer. Our results showed the relationship between the production rates of mycosporine-like amino acids (MAAs) and photoprotective pigment, such as diadinoxanthin (DD). We were experimented during May 2011 for use in the current experiment on indoor exposure to artificial UV radiation. Our results show that UV tolerance of P. glacialis was evidenced by the growth rate and chlorophyll a (Chl a) concentration under the UV conditions. The carbon uptake rate indicated that was continuously exposed to photosynthetically active radiation (PAR) for 24 hours, which was higher than that of one exposed to ultraviolet (UV) radiation (UVR). However, it indicated when the exposure time was 72 hours, which was higher than the initial value of P. glacialis exposed to UV radiation and also was higher than that of P. glacialis exposed to PAR. The time difference between the productions of these two compounds clearly reveals the defense strategy used by P. glacialis to synthesize photoprotective compounds (MAAs and DD). The results of this study appear to reflect the synthetic pathways of photoprotective compounds and the carbon cycle within the cell in contrasting patterns over time that are defined by the production of photoprotective pigments (DD) and MAAs.s) and photoprotective pigment, such as diadinoxanthin (DD). We were experimented during May 2011 for use in the current experiment on indoor exposure to artificial UV radiation. Our results show that UV tolerance of P. glacialis was evidenced by the growth rate and chlorophyll a (Chl a) concentration under the UV conditions. The carbon uptake rate indicated that was continuously exposed to photosynthetically active radiation (PAR) for 24 hours, which was higher than that of one exposed to ultraviolet (UV) radiation (UVR). However, it indicated when the exposure t
URI
http://repository.kopri.re.kr/handle/201206/8223
Conference Name
극지연구소
Conference Place
극지연구소
Conference Date
2012.05.22~
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