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Showing 1 to 12 of 2053 entries
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Measurements of mesophyll conductance, photosynthetic electron transport and alternative electron sinks of field grown wheat leaves.

Photosynthesis research

Loreto F, Di Marco G, Tricoli D, Sharkey TD.
PMID: 24310154
Photosynth Res. 1994 Sep;41(3):397-403. doi: 10.1007/BF02183042.

Photosynthetic electron transport drives the carbon reduction cycle, the carbon oxidation cycle, and any alternative electron sinks such as nitrogen reduction. A chlorophyll fluorescence- based method allows estimation of the total electron transport rate while a gas-exchange-based method can...

Light-emitting diodes as a light source for photosynthesis research.

Photosynthesis research

Tennessen DJ, Singsaas EL, Sharkey TD.
PMID: 24311004
Photosynth Res. 1994 Jan;39(1):85-92. doi: 10.1007/BF00027146.

Light-emitting diodes (LED) can provide large fluxes of red photons and so could be used to make lightweight, efficient lighting systems for photosynthetic research. We compared photosynthesis, stomatal conductance and isoprene emission (a sensitive indicator of ATP status) from...

Molecular topology of the Photosystem II chlorophyll a binding protein, CP 43: Topology of a thylakoid membrane protein.

Photosynthesis research

Sayre RT, Wrobel-Boerner EA.
PMID: 24311210
Photosynth Res. 1994 Apr;40(1):11-9. doi: 10.1007/BF00019041.

We have used antibodies generated against synthetic peptides to determine the topology of the 43 kD chlorophyll a binding protein (CP 43) of Photosystem II. Based on the pattern of proteolytic fragments detected (on western blots) by peptide specific...

Resolution of low-energy chlorophylls in Photosystem I of Synechocystis sp. PCC 6803 at 77 and 295 K through fluorescence excitation anisotropy.

Photosynthesis research

Woolf VM, Wittmershaus BP, Vermaas WF, Tran TD.
PMID: 24311211
Photosynth Res. 1994 Apr;40(1):21-34. doi: 10.1007/BF00019042.

Fluorescence excitation spectra of highly anisotropic emission from Photosystem I (PS I) were measured at 295 and 77 K on a PS II-less mutant of the cyanobacterium Synechocystis sp. PCC 6803 (S. 6803). When PS I was excited with...

Bill Arnold and calorimetric measurements of the quantum requirement of photosynthesis-once again ahead of his time.

Photosynthesis research

Malkin S, Fork DC.
PMID: 24271284
Photosynth Res. 1996 May;48(1):41-6. doi: 10.1007/BF00040994.

The approach of photocalorimetry to decide on the true quantum requirement of photosynthesis - one of the main issues of the research in the first half of the century and a source of a bitter debate - is described....

Excitation energy transfer and charge separation in the isolated Photosystem II reaction center.

Photosynthesis research

Greenfield SR, Wasielewski MR.
PMID: 24271289
Photosynth Res. 1996 May;48(1):83-97. doi: 10.1007/BF00040999.

The nature of excitation energy transfer and charge separation in isolated Photosystem II reaction centers is an area of considerable interest and controversy. Excitation energy transfer from accessory chlorophyll a to the primary electron donor P680 takes place in...

Thermoluminescence investigations on the site of action of o-phthalaldehyde in photosynthetic electron transport.

Photosynthesis research

Desai TS, Bhagwat AS, Mohanty P.
PMID: 24271301
Photosynth Res. 1996 May;48(1):213-20. doi: 10.1007/BF00041011.

Glow curves from spinach leaf discs infiltrated with o-phthalaldehyde (OPA) show significant similarity to those obtained by DCMU treatment which is known to block the electron flow from QA, the stable acceptor of Photosystem II (PS II). In both...

EPR and ENDOR studies of the water oxidizing complex of Photosystem II.

Photosynthesis research

Fiege R, Zweygart W, Bittl R, Adir N, Renger G, Lubitz W.
PMID: 24271303
Photosynth Res. 1996 May;48(1):227-37. doi: 10.1007/BF00041013.

A comparative study of X-band EPR and ENDOR of the S2 state of photosystem II membrane fragments and core complexes in the frozen state is presented. The S2 state was generated either by continuous illumination at T=200 K or...

Competition between annihilation and trapping leads to strongly reduced yields of photochemistry under ps-flash excitation.

Photosynthesis research

Wulf K, Trissl HW.
PMID: 24271306
Photosynth Res. 1996 May;48(1):255-62. doi: 10.1007/BF00041016.

Excitation of photosynthetic systems with short intense flashes is known to lead to exciton-exciton annihilation processes. Here we quantify the effect of competition between annihilation and trapping for Photosystem II, Photosystem I (thylakoids from peas and membranes from the...

Ecophysiological studies in Kalanchoë porphyrocalyx (Baker) and K. miniata (Hils et Bojer), two species performing highly flexible CAM.

Photosynthesis research

Brulfert J, Ravelomanana D, Güçlü S, Kluge M.
PMID: 24271531
Photosynth Res. 1996 Jul;49(1):29-36. doi: 10.1007/BF00029425.

Preceding results, based on the determination of stable carbon isotope composition (δ13C) of leaf tissues from various Kalanchoë species, suggested a close coincidence between the photosynthetic flexibility of the species and their habitat, life form and taxonomic position within...

Supramolecular architecture of cyanobacterial thylakoid membranes: How is the phycobilisome connected with the photosystems?.

Photosynthesis research

Bald D, Kruip J, Rögner M.
PMID: 24271608
Photosynth Res. 1996 Aug;49(2):103-18. doi: 10.1007/BF00117661.

Cyanobacteria, as the most simple organisms to perform oxygenic photosynthesis differ from higher plants especially with respect to the thylakoid membrane structure and the antenna system used to capture light energy. Cyanobacterial antenna systems, the phycobilisomes (PBS), have been...

15-Cis-β-carotene found in the reaction center of spinach Photosystem I.

Photosynthesis research

Bialek-Bylka GE, Hiyama T, Yumoto K, Koyama Y.
PMID: 24271702
Photosynth Res. 1996 Sep;49(3):245-50. doi: 10.1007/BF00034785.

β-Carotene was extracted from spinach Photosystem I reaction centers (one consisting of the Psa A, B, C, D and E subunits and the other consisting of the Psa A and B subunits alone), and the extract was subjected to...

Showing 1 to 12 of 2053 entries