Results 61 to 70 of about 5,741,545 (200)

Quality Control of Photosystem II [PDF]

Plant and Cell Physiology, 2001
Photosystem II is particularly vulnerable to excess light. When illuminated with strong visible light, the reaction center D1 protein is damaged by reactive oxygen molecules or by endogenous cationic radicals generated by photochemical reactions, which is followed by proteolytic degradation of the damaged D1 protein.
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Understanding the Changes in the Circular Dichroism of Light Harvesting Complex II upon Varying Its Pigment Composition and Organization [PDF]

, 2007
In this work we modeled the circular dichroism (CD) spectrum of LHCII, the main light harvesting antenna of photosystem II of higher plants. Excitonic calculations are performed for a monomeric subunit, taken from the crystal structure of trimeric LHCII ...
van Amerongen, H., Zwan, Gert van der,, Croce, R., Bassi, R., Georgakopoulou, Sofia,, Georgakopoulou, S., Croce, Roberta,, Bassi, Roberto,, Grondelle, R. van, van Grondelle, R., Amerongen, Herbert van,, Zwan, G. van der, van der Zwan, G., Amerongen, H. van, Grondelle, Rienk van,   +14 more
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Cyanobacterial Acclimation to Photosystem I or Photosystem II Light [PDF]

Plant Physiology, 1986
The organization and function of the photochemical apparatus of Synechococcus 6301 was investigated in cells grown under yellow and red light regimes. Broadband yellow illumination is absorbed preferentially by the phycobilisome (PBS) whereas red light is absorbed primarily by the chlorophyll (Chl) pigment beds.
A, Manodori, A, Melis
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Photosystem II function under extreme low light and low temperatures; polar vs. temperate phytoplankton

Frontiers in Photobiology
Polar phytoplankton achieve slow, but ecologically significant, productivity under exceptionally low light, where the sequential arrivals of photons at Photosystem II complexes are widely spaced in time.
Mackenzie Poirier, Natasha M. Ryan, Pomona Osmers, Arthur Plassart, Arthur Plassart, Sébastien Guérin, Marcel Babin, Maximilian Berthold, Mireille Savoie, Marina Cvetkovska, Douglas A. Campbell   +10 more
doaj   +1 more source

Effects of spine-shading on aspects of photosynthesis for three cactus species

Botan‪ical Sciences, 2016
We evaluated the effect of spine removal on three cactus species varying in spine-shading of stems. Turbinicarpus schmiedickeanus showed the greater spine shading (c. 61 %), followed by Mammillaria zephyranthoides (43 %), and Echinocactus platyacanthus (
Edilia de la Rosa-Manzano, Joel Flores, Pablo Delgado-Sánchez   +2 more
doaj   +1 more source

Photoinactivation of Photosystem II in leaves

Photosynthesis Research, 2005
Photoinactivation of Photosystem II (PS II), the light-induced loss of ability to evolve oxygen, inevitably occurs under any light environment in nature, counteracted by repair. Under certain conditions, the extent of photoinactivation of PS II depends on the photon exposure (light dosage, x), rather than the irradiance or duration of illumination per ...
Chow, Wah S (Fred), Lee, H, Hie, J, Hendrickson, Luke, Hong, Young-Nam, Matsubara, Shizue   +5 more
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Use of chlorophyll fluorescence and P700 absorbance to rapidly detect glyphosate resistance in goosegrass (Eleusine indica)

Journal of Integrative Agriculture, 2015
The rapid detection of glyphosate resistance in goosegrass (Eleusine indica) will enhance our ability to respond to new resistant populations of this major weed.
Tai-jie ZHANG, Li FENG, Xing-shan TIAN, Cai-hong YANG, Jia-dong GAO   +4 more
doaj   +1 more source

Special issue in honour of Prof. Reto J. Strasser - Influence of Cuscuta campestris Yunck. on the photosynthetic activity of Ipomoea tricolor Cav. - in vivo chlorophyll a fluorescence assessment

Photosynthetica, 2020
Cuscuta campestris Yunck. is a parasitic plant, acquiring nutrients from the hosts. Although a generalist, its hosts differ in their susceptibility. Ipomoea tricolor Cav. is a semi-compatible host - C.
L. ZAGORCHEV, A. TRAIANOVA, D. TEOFANOVA, J. LI, M. KOUZMANOVA, V. GOLTSEV   +5 more
doaj   +1 more source

Characterization of the Novel Photosynthetic Protein PPP7 involved in Cyclic Electron Flow around PSI [PDF]

, 2007
Photosynthetic organisms are able to convert light energy into chemical energy by the operation of the two photosystems, the cytochrome b6/f complex and the ATPase.
Dal Corso, Giovanni
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Light harvesting in photosystem II [PDF]

Photosynthesis Research, 2013
This review focuses on the light-harvesting properties of photosystem I (PSI) and its LHCI outer antenna. LHCI consists of different chlorophyll a/b binding proteins called Lhca's, surrounding the core of PSI. In total, the PSI-LHCI complex of higher plants contains 173 chlorophyll molecules, most of which are there to harvest sunlight energy and to ...
Croce, R., van Amerongen, H.
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