Acclimation of photosynthetic properties in ice algae

冰藻光合特性的驯化

• 批准号: 09640760
• 负责人: IMURA Satoshi
• 金额: $ 2.05万
• 依托单位: National Institute of Polar Research
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09640760/
• 关键词: Ice algae; Diatom; Photosynthesis; Photosystem; RubisCO; Diadinoxan thin cycle; Acclimation; accessory pigments; Rubis CO; クロロフィルa; 光捕集色素系; 蛍光; アイスアルジ-; 光合成補助色素; 光環境応答

Ice algae and diatoms perform highly efficient photosynthesis, in spite of these very severe environments. We investigated how their light-harvesting systems or photosystems acclimate to very low irradiance to achieve efficient photosynthesis. The way of acclimation was very unique, which was opposite to that of higher plants or green algae. In ice algae, the accessory pigments and also RubisCO were decreased and the ratio of photosystem I (PSI) to PS II was lowered in lower irradiance. And photosynthetic systems acclimated highly to very low irradiance were protected by functional diadinoxanthin cycle, equivalent to the xanthophylls cycle of higher plant, against higher irradiance.The maximum photosysthetic rate was also retained at the same level and photo inhibition could not be observed under illumination up to -800 uEm-2s-1. These properties may indicate that the efficient light-energy utilization and functioning of photosystems of the diatom cells under large variation of irradiance at short time-scale relative to their generation time such as in the ice.

尽管存在这些非常严重的环境，冰藻类和硅藻的光合作用也很高。我们调查了他们的光收获系统或光系统如何适应非常低的辐照度以实现有效的光合作用。适应方式非常独特，与较高的植物或绿藻相反。在冰藻中，辅助色素和rubisco也降低了，在较低的辐照度中，光系统I（PSI）与PS II的比率降低。与较高植物的Xanthophylls循环相当，与较高的辐照度相当于较高的辐照度，并且在相同的水平上保留了最大的光电率，并且在相同的水平上，无法观察到，在相同的水平上，无法在-800 UEM-2S-1-1。这些特性可能表明，在辐照度的大变化下，相对于它们的发电时间，例如在冰上，有效的光能利用率和功能在辐照度较大的情况下，例如在冰上（例如在冰上）。

项目成果

Ikeya, T., et al.: "Acclimation of photosynthetic properties in psychrophilic diatom isolates under different light intensities"Polar Bioscience. 13. 43-54 (1999)

Ikeya, T. 等人：“不同光强度下嗜冷硅藻分离物光合特性的适应”Polar Bioscience。

Kashino, Y., Fujimoto, K., Akamatsu, A., Kaoike, H., Satoh K., and Kudoh S.: "Photosynthetic pigment composition of ice algal and phytoplankton assemblages in early spring in Saroma ko lagoon, Hokkaido, Japan."Proc. NIPR symp. Polar Biol. 11. 22-32 (1998)

Kashino, Y.、Fujimoto, K.、Akamatsu, A.、Kaoike, H.、Satoh K. 和 Kudoh S.：“日本北海道佐吕间泻湖早春冰藻和浮游植物组合的光合色素成分

Kashino Y, et al.: "Photosynthetic pigment composition of ice algal and phytoplankton assemblages in early spring in Saroma Ko Lagoon,Hokkaido,Japan." Proceedings of the NIPR Symposium on Polar Biology. 11. 22-32 (1998)

Kashino Y 等人：“日本北海道 Saroma Ko 泻湖早春冰藻和浮游植物组合的光合色素成分。”

Ikeya, T, S. Kudoh, S. Imura, K, Watanabe, M. fukuchi and Y. Kashino: "Acclimation of photosynthetic properties in psychrophilic diatom isolates under different light intensities"Polar Bioscience. 13. 43-54 (1999)

Ikeya, T, S. Kudoh, S. Imura, K, Watanabe, M. fukuchi 和 Y. Kashino：“不同光强度下嗜冷硅藻分离物的光合特性的驯化”Polar Bioscience。

Kashino, Y., Fujimoto, K, Akamatu, A., Koike, H., Satoh K and S.: "Photosynthetic pigment composition of ice algal and phytoplankton assemblages in early spring in Saroma ko lagoon, Hokkaido, Japan"Proc. NIPR Symp. Plar Biol. 11. 22-32 (1998)

Kashino，Y.，Fujimoto，K，Akamatu，A.，Koike，H.，Satoh K 和 S.：“日本北海道 Saroma ko 泻湖早春冰藻和浮游植物组合的光合色素成分”Proc。