Taxonomic identity and the effect of temperature and irradiance on the photosynthesis of an indoor tank-cultured red alga Agardhiella subulata from Japan
详细信息    查看全文
文摘
We determined through morphological and rbcL phylogenetic analyses that a previously unidentified, but introduced species of macroalga, which has been easily cultivated in indoor tanks in Japan, is Agardhiella subulata (Solieriaceae). Additionally, the photosynthetic biology of this alga was examined by inducing photosynthetic activity under a variety of water temperatures and photosynthetic active radiation (PAR) to clarify the optimal conditions needed for its efficient cultivation. Photosynthetic activity was evaluated by using both dissolved oxygen (DO) and pulse amplitude modulated-chlorophyll fluorometric (PAM) techniques, and focused on elucidating temperature and PAR levels that would potentially maximize productivity. The DO method revealed that the net photosynthetic rates at 24?°C quickly increased as PAR increased, and approached a P max of 27.8?mg?O2?g ww ? ?min? (95?% Bayesian credible interval, BCI 23.8-2.1). The maximum gross photosynthetic rate occurred at 26.7?°C (BCI 24.4-8.3?°C). However, PAM experiments indicated that for the maximum quantum yield, the optimal temperature was 23.7?°C (BCI 22.7-4.6) and the maximum relative electron rates occurred when the water temperature was 31.0?°C (BCI 30.6-1.5). This study suggests that the broad tolerance of maximal photosynthetic activity to temperature (22.7-1.5?°C) is one of the main reasons why this alga can be successfully cultivated year-round.

© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号

地址:北京市海淀区学院路29号 邮编:100083

电话:办公室:(+86 10)66554848;文献借阅、咨询服务、科技查新:66554700