کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6304174 | 1618418 | 2014 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
The photo-physiological response of a model cnidarian-dinoflagellate symbiosis to CO2-induced acidification at the cellular level
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
AiptasiaPHIDCMU2′,7′-bis-(2-carboxyethyl)-5-(and-6)-carboxyfluorescein, acetoxymethyl esterCarbon-concentrating mechanismPNETDICSymbiodiniumIPCCPSIIROI3-(3,4-Dichlorophenyl)-1,1-dimethylurea - 3- (3،4-Dichlorophenyl) -1،1-dimethylureaBSA - BSACCm - CCMDMSO - DMSOFv/Fm - Fv / FmIntracellular pH - PH درون سلولیbovine serum albumin - آلبومین سرم گاوOcean acidification - اسیدی شدن اقیانوس هاPhotosynthetically active radiation - تابش فعال فتوسنتزیClimate change - تغییرات آب و هواPar - توسطDimethyl sulfoxide - دیمتیل سولفواکسیدRespiration rate - سرعت تنفسPhotosystem II - فتوسیستم 2region of interest - منطقه مورد نظرnet photosynthesis rate - میزان فتوسنتز خالصSymbiosis - همزیستیIntergovernmental Panel on Climate Change - هیات بین دولتی در مورد تغییرات اقلیمیdissolved inorganic carbon - کربن غیر آلی حل شده
موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم آبزیان
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
We measured the relationship between CO2-induced seawater acidification, photo-physiological performance and intracellular pH (pHi) in a model cnidarian-dinoflagellate symbiosis - the sea anemone Aiptasia sp. - under ambient (289.94 ± 12.54 μatm), intermediate (687.40 ± 25.10 μatm) and high (1459.92 ± 65.51 μatm) CO2 conditions. These treatments represented current CO2 levels, in addition to CO2 stabilisation scenarios IV and VI provided by the Intergovernmental Panel on Climate Change (IPCC). Anemones were exposed to each treatment for two months and sampled at regular intervals. At each time-point we measured a series of physiological responses: maximum dark-adapted fluorescent yield of PSII (Fv/Fm), gross photosynthetic rate, respiration rate, symbiont population density, and light-adapted pHi of both the dinoflagellate symbiont and isolated host anemone cell. We observed increases in all but one photo-physiological parameter (Pgross:R ratio). At the cellular level, increases in light-adapted symbiont pHi were observed under both intermediate and high CO2 treatments, relative to control conditions (pHi 7.35 and 7.46 versus pHi 7.25, respectively). The response of light-adapted host pHi was more complex, however, with no change observed under the intermediate CO2 treatment, but a 0.3 pH-unit increase under the high CO2 treatment (pHi 7.19 and 7.48, respectively). This difference is likely a result of a disproportionate increase in photosynthesis relative to respiration at the higher CO2 concentration. Our results suggest that, rather than causing cellular acidosis, the addition of CO2 will enhance photosynthetic performance, enabling both the symbiont and host cell to withstand predicted ocean acidification scenarios.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Experimental Marine Biology and Ecology - Volume 457, August 2014, Pages 1-7
Journal: Journal of Experimental Marine Biology and Ecology - Volume 457, August 2014, Pages 1-7
نویسندگان
Emma M. Gibbin, Simon K. Davy,