Photosynthesis acclimation under severely fluctuating light conditions allows faster growth of diatoms compared with dinoflagellates.
Photosynthesis acclimation under severely fluctuating light conditions allows faster growth of diatoms compared with dinoflagellates.
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DOI：
10.1186/s12870-021-02902-0
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发表时间：
2021-04-01
影响因子：
5.3
通讯作者：
Wang G
中科院分区：
文献类型：
--
作者：
Zhou L;Wu S;Gu W;Wang L;Wang J;Gao S;Wang G
硅藻占全球初级生产力的 20%，并且能够适应动态环境。在每年的浮游植物演替中，硅藻总是比甲藻开花得早。然而，硅藻如何适应动态环境，特别是在不断变化的光照条件下，仍不清楚。比较了赤潮硅藻中肋骨条藻、赤潮甲藻Amphidinium carterae、东海原甲藻、Karenia mikimotoi、模型硅藻三角褐指藻、假微型海链藻和模型甲藻甲藻共生藻在波动光照条件下的生长和光合作用。硅藻生长得更快，并始终保持较高水平的光合作用。硅藻对依赖于光合电子流的质子梯度调节 5 (PGR5) 的特异性抑制剂敏感，这是在波动光下保护其光合装置的关键机制。相反，甲藻对这种抑制剂不敏感。因此，我们通过敲低和过表达 PGR5 来研究 PGR5 在模型硅藻三角角藻中如何在光波动下发挥作用。与 PGR5 的敲低相比，PGR5 的过表达减少了光系统 I 受体侧限制 (Y (NA))，并在严重波动的光下增加了生长速率。硅藻比甲藻更能适应波动的光照条件。硅藻中的PGR5可以调节其光合电子流并在剧烈的光波动下加速其生长，支持先锋水华动态环境下生物量的快速积累。在线版本包含可在 10.1186/s12870-021-02902-0 获取的补充材料。
Diatoms contribute 20% of the global primary production and are adaptable in dynamic environments. Diatoms always bloom earlier in the annual phytoplankton succession instead of dinoflagellates. However, how diatoms acclimate to a dynamic environment, especially under changing light conditions, remains unclear. We compared the growth and photosynthesis under fluctuating light conditions of red tide diatom Skeletonema costatum, red tide dinoflagellate Amphidinium carterae, Prorocentrum donghaiense, Karenia mikimotoi, model diatom Phaeodactylum tricornutum, Thalassiosira pseudonana and model dinoflagellate Dinophycae Symbiodinium. Diatoms grew faster and maintained a consistently higher level of photosynthesis. Diatoms were sensitive to the specific inhibitor of Proton Gradient Regulation 5 (PGR5) depending photosynthetic electron flow, which is a crucial mechanism to protect their photosynthetic apparatus under fluctuating light. In contrast, the dinoflagellates were not sensitive to this inhibitor. Therefore, we investigate how PGR5 functions under light fluctuations in the model diatom P. tricornutum by knocking down and overexpressing PGR5. Overexpression of PGR5 reduced the photosystem I acceptor side limitation (Y (NA)) and increased growth rate under severely fluctuating light in contrast to the knockdown of PGR5. Diatoms acclimatize to fluctuating light conditions better than dinoflagellates. PGR5 in diatoms can regulate their photosynthetic electron flow and accelerate their growth under severe light fluctuation, supporting fast biomass accumulation under dynamic environments in pioneer blooms. The online version contains supplementary material available at 10.1186/s12870-021-02902-0.
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影响因子：
5.2
作者：
Chavez, FP
通讯作者：
Chavez, FP
影响因子：
2.9
作者：
Berdalet, Elisa;Peters, Francesc;Estrada, Marta
通讯作者：
Estrada, Marta
影响因子：
3.9
作者：
Alderkamp, Anne-Carlijn;van Dijken, Gert L.;Arrigo, Kevin R.
通讯作者：
Arrigo, Kevin R.
DOI：
10.1073/pnas.1221194110
发表时间：
2013-03-05
影响因子：
11.1
作者：
Allahverdiyeva, Yagut;Mustila, Henna;Aro, Eva-Mari
通讯作者：
Aro, Eva-Mari
影响因子：
4.5
作者：
Croteau, Dany;Guerin, Sebastien;Lavaud, Johann
通讯作者：
Lavaud, Johann