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MANGANESE AS ESSENTIAL AND TOXIC ELEMENT FOR PLANTS: TRANSPORT, ACCUMULATION AND RESISTANCE MECHANISMS
Manganese is an essential element for plants, intervening in several metabolic processes, mainly in photosynthesis and as an enzyme antioxidant-cofactor. Nevertheless, an excess of this micronutrient… Expand
Structure and composition of the photochemical apparatus of the antarctic green alga, Chlamydomonas subcaudata
The green alga, Chlamydomonas subcaudata, collected from a perennially ice-covered Antarctic lake, was able to grow at temperatures of 16°C or lower, but not at temperatures of 20°C or higher, which… Expand
IMMUTANS Does Not Act as a Stress-Induced Safety Valve in the Protection of the Photosynthetic Apparatus of Arabidopsis during Steady-State Photosynthesis1
IMMUTANS (IM) encodes a thylakoid membrane protein that has been hypothesized to act as a terminal oxidase that couples the reduction of O2 to the oxidation of the plastoquinone (PQ) pool of the… Expand
Photosystem II Excitation Pressure and Development of Resistance to Photoinhibition (II. Adjustment of Photosynthetic Capacity in Winter Wheat and Winter Rye)
Winter wheat (Triticum aestivum L. cv Monopol), spring wheat (Triticum aestivum L. cv Katepwa), and winter rye (Secale cereale L. cv Musketeer) grown at 5[deg]C and moderate irradiance (250 [mu]mol… Expand
Differential thermal effects on the energy distribution between photosystem II and photosystem I in thylakoid membranes of a psychrophilic and a mesophilic alga.
- R. Morgan-Kiss, A. Ivanov, J. Williams, Mobashsher Khan, N. Huner
- Biology, Medicine
- Biochimica et biophysica acta
- 12 April 2002
Sensitivity of the photosynthetic thylakoid membranes to thermal stress was investigated in the psychrophilic Antarctic alga Chlamydomonas subcaudata. C. subcaudata thylakoids exhibited an elevated… Expand
Psychrophily is associated with differential energy partitioning, photosystem stoichiometry and polypeptide phosphorylation in Chlamydomonas raudensis.
Chlamydomonas raudensis UWO 241 and SAG 49.72 represent the psychrophilic and mesophilic strains of this green algal species. This novel discovery was exploited to assess the role of psychrophily in… Expand
Betaine Improves Freezing Tolerance in Wheat
The accumulation of the osmolyte betaine was found to be correlated with the development of freezing tolerance (FT) of two wheat cultivars where it increases by about three fold during the cold'… Expand
Glycinebetaine protects the D1/D2/Cytb559 complex of photosystem II against photo-induced and heat-induced inactivation.
- S. Allakhverdiev, H. Hayashi, +5 authors R. Carpentier
- Chemistry, Medicine
- Journal of plant physiology
The presence of 1.0 mol/L glycinebetaine during isolation of D1/D2/Cytb559 reaction centre (RC) complexes from photosystem II (PSII) membrane fragments preserved the photochemical activity, monitored… Expand
Excess manganese differentially inhibits photosystem I versus II in Arabidopsis thaliana
- R. Millaleo, M. Reyes-Díaz, M. Alberdi, A. Ivanov, M. Krol, N. Hüner
- Biology, Medicine
- Journal of experimental botany
- 26 November 2012
The effects of exposure to increasing manganese concentrations (50–1500 µM) from the start of the experiment on the functional performance of photosystem II (PSII) and photosystem I (PSI) and… Expand
The Antarctic psychrophile, Chlamydomonas subcaudata, is deficient in state I–state II transitions
Abstract. State I–State II transitions were monitored in vivo and in vitro in the Antarctic, psychrophillic, green alga, Chlamydomonas subcaudata, as changes in the low-temperature (77 K) chlorophyll… Expand