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IMMUTANS Does Not Act as a Stress-Induced Safety Valve in the Protection of the Photosynthetic Apparatus of Arabidopsis during Steady-State Photosynthesis1
Neither functional analyses of the IM knockout and overexpression lines nor meta-analyses of gene expression support the model that IM acts as a safety valve to regulate the redox state of the PQ pool during stress and acclimation, but IM appears to be strongly regulated by developmental stage of Arabidopsis.
Psychrophily is associated with differential energy partitioning, photosystem stoichiometry and polypeptide phosphorylation in Chlamydomonas raudensis.
Excess manganese differentially inhibits photosystem I versus II in Arabidopsis thaliana
- R. Millaleo, M. Reyes-Díaz, M. Alberdi, A. Ivanov, M. Król, N. Hüner
- Environmental ScienceJournal of Experimental Botany
- 26 November 2012
The results demonstrate for the first time that PSI is the major target of Mn toxicity within the photosynthetic apparatus of Arabidopsis plants.
Photosynthetic Redox Imbalance Governs Leaf Sectoring in the Arabidopsis thaliana Variegation Mutants immutans, spotty, var1, and var2[W]
It is concluded that mutations involving components of the photosynthetic electron transport chain, such as those present in immutans, spotty, var1, and var2, predispose Arabidopsis chloroplasts to photooxidation under high excitation pressure, resulting in the variegated phenotype.
Effect of static magnetic fields on the growth, photosynthesis and ultrastructure of Chlorella kessleri microalgae
By increasing daily biomass production about fourfold, 10 mT magnetic field exposure could make algal oil cost competitive with other biodiesel feedstocks.
Chlamydomonas raudensis (UWO 241), Chlorophyceae, exhibits the capacity for rapid D1 repair in response to chronic photoinhibition at low temperature 1
- Tessa Pocock, A.T.E. Koziak, D. Rosso, S. Falk, N. Hüner
- Environmental Science, Biology
- 1 October 2007
The susceptibility of C. raudensis UWO 241 to low‐temperature photoinhibition reflects its adaptation to low growth irradiance, whereas the unusually rapid rate of recovery at low temperature exhibited by this psychrophile is due to a novel D1 repair cycle that is adapted to and is maximally operative at lowTemperature.
Flexibility in photosynthetic electron transport: the physiological role of plastoquinol terminal oxidase (PTOX).
Increased Air Temperature during Simulated Autumn Conditions Does Not Increase Photosynthetic Carbon Gain But Affects the Dissipation of Excess Energy in Seedlings of the Evergreen Conifer Jack…
It is concluded that photoperiod control of dormancy in Jack pine appears to negate any potential for an increased carbon gain associated with higher temperatures during the autumn season.
Salinity affects the photoacclimation of Chlamydomonas raudensis Ettl UWO241
- K. Takizawa, Shinichirou Takahashi, N. Hüner, J. Minagawa
- Environmental SciencePhotosynthesis Research
- 10 January 2009
It is demonstrated that this psychrophile is halotolerant, not halophilic, and it shows energy redistribution between photosystem I and II based on energy spillover under low-salt conditions, andIt is revealed that C. raudensis exhibits higher non-photochemical quenching in comparison with the mesophile Chlamydomonas reinhardtii, when grown with high salinity.
Stress-related hormones and glycinebetaine interplay in protection of photosynthesis under abiotic stress conditions
A model describing the close interaction and synergistic physiological effects of GB and ABA in the process of cold acclimation of higher plants is proposed and it is suggested that the stress-induced GB biosynthesis pathway may well serve as an additional or alternative biochemical sink, one which consumes excess photosynthesis-generated electrons, thus protecting photosynthetic apparatus from overreduction.