太阳模拟人工光下近红外光对聚囊藻PCC6803光合作用的可能作用

Q3 Agricultural and Biological Sciences Environmental Control in Biology Pub Date : 2018-01-01 DOI:10.2525/ECB.56.17
Kota Oshita, Takuya Suzuki, T. Kawano
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引用次数: 3

摘要

太阳模拟光(Solar simulation light, SSL)已被广泛用于评价光伏电池和藻类光合作用的性能。绿色植物和藻类利用叶绿素,因此以叶绿素为目标的光组分主要参与光合作用。相比之下,近红外(NIR)光几乎不能激发光合作用。由于SSL光谱涵盖了从紫外线到近红外的广泛范围,我们研究了近红外成分在synnechocystis (sp. PCC6803)光合o2进化过程中SSL的作用,通过使用几个NIR-cut滤波器选择性地逐步消除近红外。本文研究了完整的SSL光谱和NIR切割过滤的SSL光谱(缺乏超过690、710、750和810 nm的近红外光)的影响。我们观察到750 nm的近通滤镜降低了最大光合速率(P max),同时降低了光强的Michaelis常数值(K j),而810 nm的近通滤镜没有显著变化。我们得出结论,750 (cid:1) 810 nm波段可能含有刺激光合作用的近红外成分,其作用与已知现象(爱默生效应)不同。相比之下,Synechocystis出人意料地通过消除近红外((cid:6) 710 nm)的所有范围来恢复光合作用,这表明与细菌光敏色素吸收带对应的710 (cid:1) 750 nm远红波段可能对光合作用有抑制作用。
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Possible Roles of Near-infrared Light on the Photosynthesis in Synechocystis sp. PCC6803 under Solar Simulating Artificial Light
Solar simulating light (SSL) has been widely used for evaluating the performance of photovoltaic cells and algal photosynthesis. Green plants and algae utilize chlorophylls, thus, the chlorophyll-targeting light components mostly contribute to photosynthesis. In contrast, near infrared (NIR) light hardly energizes photosynthesis. Since SSL spectrum covers a wide range of light from ultraviolet to NIR, we examined the roles of NIR components in SSL during photosynthetic O 2 evolution in Synechocystis (sp. PCC6803), by selectively and step-wisely eliminating the NIR using several NIR-cut filters. Here, the effects of intact SSL spectrum and the NIR-cut filtered SSL spectra (lacking NIR light greater than 690, 710, 750, or 810 nm) were examined. We observed that the 750 nm shortpass filter lowered the maximal photosynthetic velocity ( P max ), and concomitantly, the Michaelis constant-like value for light intensity ( K j ), whereas no significant change was observed with the 810 nm shortpass filter. We concluded that the 750 (cid:1) 810 nm band may contain the photosynthesis-stimulating NIR component acting differently from the known phenomenon (Emerson effect). In contrast, Synechocystis unexpectedly regained the photosynthetic performance by eliminating all range of NIR ( (cid:6) 710 nm), suggesting that 710 (cid:1) 750 nm far-red band corresponding to the absorption band for bacterial phytochrome is possibly inhibitory to photosynthesis.
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来源期刊
Environmental Control in Biology
Environmental Control in Biology Agricultural and Biological Sciences-Agronomy and Crop Science
CiteScore
2.00
自引率
0.00%
发文量
25
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