The water-water cycle facilitates photosynthetic regulation under fluctuating light in the epiphytic orchid Dendrobium officinale
The water-water cycle facilitates photosynthetic regulation under fluctuating light in the epiphytic orchid Dendrobium officinale
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水-水循环促进附生兰花铁皮石斛在波动光下的光合作用调节
DOI：
10.1016/j.envexpbot.2020.104238
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发表时间：
2020-12
影响因子：
5.7
通讯作者：
Wei Huang
中科院分区：
文献类型：
--
作者：
Yingjie Yang;Shunling Tan;Jialin Huang;Shibao Zhang;Wei Huang
波动光可引起被子植物光系统I的选择性光抑制。然而，野生附生植物在波动光下的光合调节策略却知之甚少。本文比较了附生铁皮石斛和陆生白芨的PSI和PSII在波动光下的表现。在暗-明转换时，D.结果表明，中药组的P700迅速再氧化，而中药组的P700没有迅速再氧化。纹状体。在从黑暗过渡到光化光后的前40 s内，B。纹状体的循环电子传递（CET）活性明显高于D。officinale。然而，这种CET的强烈激活并不能阻止PSI的过度降低。因此，铁皮石斛中P700的快速再氧化归因于假循环电子传递（水-水循环）。在从弱光到强光转换后的前60 s内，PSI在铁皮石斛中被高度氧化，而在B中被高度还原。纹状体。同时，B。纹状体对CET的刺激作用更强。这些结果表明，水-水循环显着调节PSI的氧化还原状态下波动的光在附生植物的arrhidD。officinale。相比之下，陆地上的AsiaidB.纹状体利用CET来科普波动的光，类似于拟南芥的表型。总的来说，这两种兰花使用不同的光合调节策略来科普波动的光线。
Fluctuating light can cause selective photoinhibition of photosystem I (PSI) in angiosperms. However, the strategies for photosynthetic regulation under fluctuating light in wild epiphytic plants are little known. We here compared PSI and PSII performances under fluctuating light in the epiphytic orchidDendrobium officinaleand the terrestrial orchidBletilla striata. Upon dark-to-light transition,D. officinaleshowed a rapid re-oxidation of P700, but this rapid re-oxidation of P700 was not observed inB. striata. Within the first 40 s after transition from dark to actinic light,B. striatashowed much higher activation of cyclic electron transport (CET) thanD. officinale. However, this strong activation of CET could not prevent the over-reduction of PSI. Therefore, the rapid re-oxidation of P700 inD. officinalewas attributed to pseudo-cyclic electron transport (water-water cycle). Within the first 60 s after transition from low to high light, PSI was highly oxidized inD. officinalebut was highly reduced inB. striata. Concomitantly,B. striatashowed much higher stimulation of CET. These results indicate that water-water cycle significantly regulates PSI redox state under fluctuating light in the epiphytic orchidD. officinale. By comparison, the terrestrial orchidB. striataemploys CET to cope with fluctuating light, similar to the phenotype ofArabidopsis thaliana. Taking together, these two orchids used different strategies for photosynthetic regulation to cope with fluctuating light.
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影响因子：
7.4
作者：
S. Takahashi;Sara E. Milward;Da-Yong Fan;W. Chow;M. Badger
通讯作者：
S. Takahashi;Sara E. Milward;Da-Yong Fan;W. Chow;M. Badger
影响因子：
4.6
作者：
Yamori W;Makino A;Shikanai T
通讯作者：
Shikanai T
影响因子：
4.2
作者：
Haupt-Herting, S;Fock, HP
通讯作者：
Fock, HP
PSI 光抑制与 PSII 到 PSI 的电子转移更相关，而不是与 Psychotria rubra 中的 PSI 氧化还原状态相关
影响因子：
3.7
作者：
Huang, Wei;Yang, Ying-Jie;Zhang, Shi-Bao
通讯作者：
Zhang, Shi-Bao
PSII 冷却诱导光抑制后恢复过程中循环电子流的刺激
影响因子：
4.9
作者：
Huang, Wei;Zhang, Shi-Bao;Cao, Kun-Fang
通讯作者：
Cao, Kun-Fang