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	Use of UV-A Energy for Photosynthesis in the Red Macroalga Gracilaria lemaneiformis
	Xu, Juntian（Huaihai Inst Technol, Key Lab Marine Biotechnol Jiangsu Prov, Lianyungang, Peoples R China） ; Gao, Kunshan ; Gao KS(高坤山)
	2010-05
关键词	SPIRULINA PLATENSIS CYANOPHYTA ULTRAVIOLET ACTION SPECTRA INORGANIC CARBON B RADIATION BICARBONATE UTILIZATION MARINE-PHYTOPLANKTON PHOTOSYSTEM-II CHLOROPHYLL-A ULVA-LACTUCA AMINO-ACIDS
英文摘要	UV radiation is known to inhibit photosynthetically active radiation (PAR)-driven photosynthesis; however, moderate levels of UV-A have been shown to enhance photosynthesis and growth rates of some algae. Here, we have shown that UV-A alone could drive photosynthetic utilization of bicarbonate in the red alga Gracilaria lemaneiformis as evidenced in either O-2 evolution or carbon fixation as well as pH drift. Addition of UV-B inhibited the apparent photosynthetic efficiency, raised the photosynthetic compensation point and photosynthesis-saturating irradiance level, but did not significantly affect the maximal rate of photosynthetic O-2 evolution. The electron transport inhibitor, DCMU, inhibited the photosynthesis completely, reflecting that energy of UV-A was transferred in the same way as that of PAR. Inorganic carbon acquisition for photosynthesis under UV alone was inhibited by the inhibitors of carbonic anhydrase. The results provided the evidence that G. lemaneiformis can use UV-A efficiently to drive photosynthesis based on the utilization of bicarbonate, which could contribute significantly to the enhanced photosynthesis in the presence of UV-A observed under reduced levels of solar radiation.; National Basic Research Program of China [2009CB421207]; National Natural Science Foundation of China [40930846, 40876058]; Ministry of Education [308015]
语种	英语
出版者	WILEY-BLACKWELL PUBLISHING, INC
内容类型	期刊论文
源URL	[http://dx.doi.org/doi:10.1111/j.1751-1097.2010.00709.x]
专题	海洋环境－已发表论文
推荐引用方式 GB/T 7714	Xu, Juntian,Gao, Kunshan,Gao KS. Use of UV-A Energy for Photosynthesis in the Red Macroalga Gracilaria lemaneiformis[J],2010.
APA	Xu, Juntian,Gao, Kunshan,&高坤山.(2010).Use of UV-A Energy for Photosynthesis in the Red Macroalga Gracilaria lemaneiformis..
MLA	Xu, Juntian,et al."Use of UV-A Energy for Photosynthesis in the Red Macroalga Gracilaria lemaneiformis".(2010).

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