کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10795343 | 1052572 | 2015 | 33 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Regulation of excitation energy transfer in diatom PSII dimer: How does it change the destination of excitation energy?
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کلمات کلیدی
PSIPSIIChlTRFsFCPFDASEnergy transfer - انتقال انرژیdiatom - دیاتومChlorophyll - سبزینه یا کلروفیلTime-resolved fluorescence spectra - طیف فلورسانس حل شده زمانphotosystem I - عکس سیستم منPhotosystem II - فتوسیستم 2Quench - فرو نشاندنTime-resolved fluorescence - فلورسانس حل شده در زمانreaction center - مرکز واکنش
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Energy transfer dynamics in dimeric photosystem II (PSII) complexes isolated from four diatoms, Chaetoceros gracilis, Cyclotella meneghiniana, Thalassiosira pseudonana, and Phaeodactylum tricornutum, are examined. Time-resolved fluorescence measurements were conducted in the range of 0-80Â ns. Delayed fluorescence spectra showed a clear difference between PSII monomer and PSII dimer isolated from the four diatoms. The difference can be interpreted as reflecting suppressed energy transfer between PSII monomers in the PSII dimer for efficient energy trapping at the reaction center. The observation was especially prominent in C. gracilis and T. pseudonana. The pathways seem to be suppressed under a low pH condition in isolated PSII complexes from C. gracilis, and excitation energy may be quenched with fucoxanthin chlorophyll a/c-binding protein (FCP) that was closely associated with PSII in C. gracilis. The energy transfer between PSII monomers in the PSII dimer may play a role in excitation energy regulation in diatoms.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochimica et Biophysica Acta (BBA) - Bioenergetics - Volume 1847, Issue 10, October 2015, Pages 1274-1282
Journal: Biochimica et Biophysica Acta (BBA) - Bioenergetics - Volume 1847, Issue 10, October 2015, Pages 1274-1282
نویسندگان
Makio Yokono, Ryo Nagao, Tatsuya Tomo, Seiji Akimoto,