Počet záznamů: 1
Photosynthesis in Chromera velia Represents a Simple System with High Efficiency
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SYSNO ASEP 0390068 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Photosynthesis in Chromera velia Represents a Simple System with High Efficiency Tvůrce(i) Quigg, A. (US)
Kotabová, Eva (MBU-M) RID, ORCID
Jarešová, Jana (MBU-M) RID
Kaňa, Radek (MBU-M) RID, ORCID
Šetlík, Jiří (MBU-M)
Šedivá, Barbora (MBU-M)
Komárek, Ondřej (MBU-M) RID
Prášil, Ondřej (MBU-M) RID, ORCIDZdroj.dok. PLoS ONE. - : Public Library of Science - ISSN 1932-6203
Roč. 7, č. 10 (2012), e47036Poč.str. 12 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova Photosynthesis ; Chromera velia ; RuBISCO Vědní obor RIV EE - Mikrobiologie, virologie CEP IAA601410907 GA AV ČR - Akademie věd GBP501/12/G055 GA ČR - Grantová agentura ČR GAP501/12/0304 GA ČR - Grantová agentura ČR Institucionální podpora MBU-M - RVO:61388971 UT WOS 000312385200071 DOI 10.1371/journal.pone.0047036 Anotace Chromera velia (Alveolata) is a close relative to apicomplexan parasites with a functional photosynthetic plastid. Even though C. velia has a primitive complement of pigments (lacks chlorophyll c) and uses an ancient type II form of RuBISCO, we found that its photosynthesis is very efficient with the ability to acclimate to a wide range of irradiances. C. velia maintain similar maximal photosynthetic rates when grown under continual light-limited (low light) or light-saturated (high light) conditions. This flexible acclimation to continuous light is provided by an increase of the chlorophyll content and photosystem II connectivity under light limited conditions and by an increase in the content of protective carotenoids together with stimulation of effective non-photochemical quenching under high light. C. velia is able to significantly increase photosynthetic rates when grown under a light-dark cycle with sinusoidal changes in light intensity. Photosynthetic activities were nonlinearly related to light intensity, with maximum performance measured at midmorning. C. velia efficiently acclimates to changing irradiance by stimulation of photorespiration and non-photochemical quenching, thus avoiding any measurable photoinhibition. We suggest that the very high CO2 assimilation rates under sinusoidal light regime are allowed by activation of the oxygen consuming process (possibly chlororespiration) that maintains high efficiency of RuBISCO (type II). Despite the overall simplicity of the C. velia photosynthetic system, it operates with great efficiency Pracoviště Mikrobiologický ústav Kontakt Eliška Spurná, eliska.spurna@biomed.cas.cz, Tel.: 241 062 231 Rok sběru 2013
Počet záznamů: 1