RRC ID 37157
著者 Giannelli L, Yamada H, Katsuda T, Yamaji H.
タイトル Effects of temperature on the astaxanthin productivity and light harvesting characteristics of the green alga Haematococcus pluvialis.
ジャーナル J Biosci Bioeng
Abstract The green alga Haematococcus pluvialis, which accumulates astaxanthin at an optimal temperature of 20°C, was cultivated under temperatures of 20°C, 23.5°C, 27°C, and 30.5°C, in order to assess the effects on algal metabolism during the growth phase. The culture growth rate declined with above-optimal increases in temperature, and the final maximum cell concentration at 30.5°C reached only 35% of that attained at 20°C. On the contrary, the biomass productivity was increased under all the high-temperature conditions, probably reflecting the metabolism switch from cell duplication to energy accumulation that is typically observed in algal cultures subjected to environmental stress. Moreover, an increase in the light-harvesting capability of the alga was observed by means of the total pigment balance and the photosynthesis-intensity (PI) curve measured under the different cultivation conditions. Cultures kept at higher temperatures were able to better harvest and utilize the impinging light due to photo-acclimation. Finally, the differences in the astaxanthin metabolism were elucidated by subjecting the cultures to nitrogen starvation at 20°C and 27°C. In the culture at 27°C, a 1.4-fold increase in the astaxanthin productivity was observed when compared to that at 20°C, and the latter required almost two-fold more energy for the astaxanthin production compared with the 27°C culture.
巻・号 119(3)
ページ 345-50
公開日 2015-3-1
DOI 10.1016/j.jbiosc.2014.09.002
PII S1389-1723(14)00337-5
PMID 25441445
MeSH Biomass Bioreactors* / economics Chlorophyta / cytology Chlorophyta / metabolism* Chlorophyta / radiation effects* Light* Nitrogen / metabolism Photosynthesis / radiation effects Temperature* Xanthophylls / biosynthesis
IF 2.366
引用数 35
WOS 分野 FOOD SCIENCE & TECHNOLOGY BIOTECHNOLOGY & APPLIED MICROBIOLOGY
リソース情報
藻類 NIES-144