کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10796108 | 1052693 | 2005 | 15 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Modulation of photosynthetic electron transport in the absence of terminal electron acceptors: Characterization of the rbcL deletion mutant of tobacco
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
ETR2,6-dimethyl-p-benzoquinoneferredoxin-NADP oxidoreductaseDMBQribulose-1,5-biphosphate carboxylase/oxygenaseCP29NDH-1P700P680PTOXDCMULHCIIFNRNPQChlPSIIPSIDABRuBisCO3-(3,4-Dichlorophenyl)-1,1-dimethylurea - 3- (3،4-Dichlorophenyl) -1،1-dimethylurea3,3′-diaminobenzidine - 3،3'-diaminobenzidineQA and QB - QA و QBROS - ROSEPR - تشدید پارامغناطیس الکترونElectron paramagnetic resonance - تشدید پارامغناطیس الکترونNon-photochemical quenching - خنک سازی غیر فتوشیمیاییChlorophyll - سبزینه یا کلروفیلcyt - سیتcytochrome - سیتوکرومphotosystem I - عکس سیستم منPhotoinhibition - عکسبرداریPhotosynthesis - فتوسنتزPhotosystem II - فتوسیستم 2Electron transport rate - نرخ انتقال الکترونwild type - نوع وحشیplastid terminal oxidase - پلاستیک ترمینال اکسیدازplastoquinone - پلواستیکینونThermoluminescence - گرماتابیReactive oxygen species - گونههای فعال اکسیژن
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
دانش گیاه شناسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Modulation of photosynthetic electron transport in the absence of terminal electron acceptors: Characterization of the rbcL deletion mutant of tobacco Modulation of photosynthetic electron transport in the absence of terminal electron acceptors: Characterization of the rbcL deletion mutant of tobacco](/preview/png/10796108.png)
چکیده انگلیسی
Tobacco rbcL deletion mutant, which lacks the key enzyme Rubisco for photosynthetic carbon assimilation, was characterized with respect to thylakoid functional properties and protein composition. The ÎrbcL plants showed an enhanced capacity for dissipation of light energy by non-photochemical quenching which was accompanied by low photochemical quenching and low overall photosynthetic electron transport rate. Flash-induced fluorescence relaxation and thermoluminescence measurements revealed a slow electron transfer and decreased redox gap between QA and QB, whereas the donor side function of the Photosystem II (PSII) complex was not affected. The 77 K fluorescence emission spectrum of ÎrbcL plant thylakoids implied a presence of free light harvesting complexes. Mutant plants also had a low amount of photooxidisible P700 and an increased ratio of PSII to Photosystem I (PSI). On the other hand, an elevated level of plastid terminal oxidase and the lack of F0 'dark rise' in fluorescence measurements suggest an enhanced plastid terminal oxidase-mediated electron flow to O2 in ÎrbcL thylakoids. Modified electron transfer routes together with flexible dissipation of excitation energy through PSII probably have a crucial role in protection of PSI from irreversible protein damage in the ÎrbcL mutant under growth conditions. This protective capacity was rapidly exceeded in ÎrbcL mutant when the light level was elevated resulting in severe degradation of PSI complexes.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochimica et Biophysica Acta (BBA) - Bioenergetics - Volume 1709, Issue 1, 15 August 2005, Pages 69-83
Journal: Biochimica et Biophysica Acta (BBA) - Bioenergetics - Volume 1709, Issue 1, 15 August 2005, Pages 69-83
نویسندگان
Yagut Allahverdiyeva, Fikret Mamedov, Pirkko Mäenpää, Imre Vass, Eva-Mari Aro,