نتایج جستجو برای: photosynthetic apparatus

تعداد نتایج: 70737  

Journal: :The Journal of biological chemistry 2002
Daniel Karcher Ralph Bock

RNA editing in plant organelles post-transcriptionally alters single nucleotides by C-to-U or U-to-C conversions at highly specific sites. Plant editing is generally viewed as a repair mechanism acting at the transcript level by restoring conserved amino acid residues. Here we report that an editing reaction within the ndhB transcript (encoding a plastid NAD(P)H dehydrogenase subunit) is strict...

2002
Stéphane Maritorena Claude Payri Marcel Babin Hervé Claustre Luc Bonnafous André Morel Michel Rodière

Photoacclimatization of zooxanthellae extracted from the coral Pocillopora verrucosa was studied through the determination of pigments, light absorption and photosynthetic parameters, for samples collected in summer and winter between 1 and 40 m on a northwestern reef of Tahiti (French Polynesia). The same measurements were also performed on phytoplanktonic samples collected at a stable oceanic...

Journal: :Annual review of genetics 2008
Stephan Eberhard Giovanni Finazzi Francis-André Wollman

Despite recent elucidation of the three-dimensional structure of major photosynthetic complexes, our understanding of light energy conversion in plant chloroplasts and microalgae under physiological conditions requires exploring the dynamics of photosynthesis. The photosynthetic apparatus is a flexible molecular machine that can acclimate to metabolic and light fluctuations in a matter of secon...

Journal: :Philosophical transactions of the Royal Society of London. Series B, Biological sciences 2014
Oliver Ebenhöh Geoffrey Fucile Giovanni Finazzi Jean-David Rochaix Michel Goldschmidt-Clermont

Photosynthetic eukaryotes house two photosystems with distinct light absorption spectra. Natural fluctuations in light quality and quantity can lead to unbalanced or excess excitation, compromising photosynthetic efficiency and causing photodamage. Consequently, these organisms have acquired several distinct adaptive mechanisms, collectively referred to as non-photochemical quenching (NPQ) of c...

Journal: :Faraday discussions 2012
Graham R Fleming Gabriela S Schlau-Cohen Kapil Amarnath Julia Zaks

Photosynthetic organisms are capable of harvesting solar energy with near unity quantum efficiency. Even more impressively, this efficiency can be regulated in response to the demands of photosynthetic reactions and the fluctuating light-levels of natural environments. We discuss the distinctive design principles through which photosynthetic light-harvesting functions. These emergent properties...

Journal: :The EMBO journal 1997
A C Mustilli C Bowler

Plants have developed flexible mechanisms to respond appropriately to environmental signals. These stimuli are transduced by largely unknown signalling pathways that are likely to be modulated by endogenous developmental signals to produce an integrated response that coordinately regulates gene expression. Light is a critical environmental signal that controls many aspects of plant development ...

2003
L. N. Kalituho N. L. Pshybytko L. F. Kabashnikova P. Jahns

The rate of oxygen evolution/consumption, in vivo electron transport activity, overall photosynthetic capacity and accumulation of the chloroplast 30 kDa heat shock proteins were studied after treatment of intact barley seedlings at 40oC for 3 hours either in presence of low white light (100 μmol m–2.s–1) or in the dark. High temperature impact in the dark resulted in lowering of water-splittin...

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