Results 51 to 60 of about 31,838 (263)

Heavy Metal Contamination: Impacts From Plants to the Food Chain and Eco‐Friendly Amelioration Strategies

AgriFood: Journal of Agricultural Products for Food, EarlyView.
Heavy metal pollution reduces soil health and threatens food safety by entering plants; however, the use of nanoparticles, biofertilizers, and organic fertilizers such as biochar offers a promising strategy for improvement and sustainable agriculture. ABSTRACT Heavy metal (HM) pollution, resulting from human activities such as mining and the excessive ...
Sina Siavash Moghaddam, Latifeh Pourakbar, Sevda Alizadeh, Zahra Alizadeh, Jelena Popović‐Djordjević   +4 more
wiley   +1 more source

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
openaire   +2 more sources

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

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

The role of lipids in photosystem II

Biochimica et Biophysica Acta (BBA) - Bioenergetics, 2012
The thylakoid membranes of photosynthetic organisms, which are the sites of oxygenic photosynthesis, are composed of monogalactosyldiacylglycerol (MGDG), digalactosyldiacylglycerol (DGDG), sulfoquinovosyldiacylglycerol (SQDG), and phosphatidylglycerol (PG).
Mizusawa, Naoki, Wada, Hajime
openaire   +2 more sources

Tyrosyl radicals in Photosystem II

Biochimica et Biophysica Acta (BBA) - Bioenergetics, 2004
In PSII, there are two redox-active tyrosines, D and Z, with different midpoint potentials and different reduction kinetics. The factors responsible for these functional differences have not yet been elucidated. Recent model compound studies of tyrosinate and of tyrosine-containing dipeptides have demonstrated that perturbations of the amino and amide ...
Pujols-Ayala, Idelisa, Barry, Bridgette A.   +1 more
openaire   +2 more sources

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.
openaire   +5 more sources

Specific association of photosystem II and light‐harvesting complex II in partially solubilized photosystem II membranes [PDF]

FEBS Letters, 1998
In this study, we report the structural characterization of photosystem II complexes obtained from partially solubilized photosystem II membranes. Direct observation by electron microscopy, within a few minutes after a mild disruption of the membranes with the detergent n‐dodecyl‐α,d‐maltoside, revealed the presence of several large supramolecular ...
Boekema, EJ, van Roon, H, Dekker, JP, Dekker, Jan P.   +3 more
openaire   +4 more sources