Results 21 to 30 of about 759,473 (295)

Vertical distribution of chlorophyll a concentration and phytoplankton community composition from in situ fluorescence profiles: a first database for the global ocean [PDF]

Earth System Science Data, 2015
In vivo chlorophyll a fluorescence is a proxy of chlorophyll a concentration, and is one of the most frequently measured biogeochemical properties in the ocean.
R. Sauzède, H. Lavigne, H. Claustre, J. Uitz, C. Schmechtig, F. D'Ortenzio, C. Guinet, S. Pesant   +7 more
doaj   +1 more source

Evaluation of the Condition of Respiration and Photosynthesis by Measuring Chlorophyll Fluorescence in Cyanobacteria

Bio-Protocol, 2018
Chlorophyll fluorescence measurements have been widely used to monitor the condition of photosynthesis. Furthermore, chlorophyll fluorescence from cyanobacteria reflects the condition of respiration, since cyanobacterial photosynthesis shares several ...
Takako Ogawa, Kintake Sonoike
doaj   +1 more source

High throughput analysis of leaf chlorophyll content in sorghum using RGB, hyperspectral, and fluorescence imaging and sensor fusion

Plant Methods, 2022
Background Leaf chlorophyll content plays an important role in indicating plant stresses and nutrient status. Traditional approaches for the quantification of chlorophyll content mainly include acetone ethanol extraction, spectrophotometry and high ...
Huichun Zhang, Yufeng Ge, Xinyan Xie, Abbas Atefi, Nuwan K. Wijewardane, Suresh Thapa   +5 more
doaj   +1 more source

Chlorophyll Fluorescence Imaging-Based Duckweed Phenotyping to Assess Acute Phytotoxic Effects

Plants, 2021
Duckweeds (Lemnaceae species) are extensively used models in ecotoxicology, and chlorophyll fluorescence imaging offers a sensitive and high throughput platform for phytotoxicity assays with these tiny plants.
Viktor Oláh, Anna Hepp, Muhammad Irfan, Ilona Mészáros   +3 more
doaj   +1 more source

Effects of Chitosan as Growth Elicitor on Some Growth Parameters and Essential Oils Yield of Dracocephalium moldavica L. Under Salinity Condition [PDF]

Journal of Agricultural Science and Sustainable Production, 2020
Plant growth and development are adversely affected by salinity. In order to evaluate the effects of different salinity levels and application of chitosan on some growth parameters, photosynthesis pigments and essential oils content and yield of ...
gholamreza gohari, Mohammad Kazem Bahrami   +1 more
doaj  

Picosecond fluorescence of intact and dissolved PSI-LHCI crystals [PDF]

, 2008
Over the last years many crystal structures of photosynthetic pigment-protein complexes have been determined, and used extensively to model spectroscopic results obtained on the same proteins in solution. However, the crystal structure is not necessarily
Amerongen, H., van, Croce, R., Hoek, A., van, Borst, J.W., Nelson, N., Oort, B.F., van, Amunts, A.   +6 more
core   +1 more source

Fresh perspectives on an established technique: Pulsed amplitude modulation chlorophyll a fluorescence

Plant-Environment Interactions, 2022
Pulsed amplitude modulation (PAM) chlorophyll a fluorescence provides information about photosynthetic energy transduction. When reliably measured, chlorophyll a fluorescence provides detailed information about critical in vivo photosynthetic processes ...
Guanqiang Zuo, Robert M. Aiken, Naijie Feng, Dianfeng Zheng, Haidong Zhao, Thomas J. Avenson, Xiaomao Lin   +6 more
doaj   +1 more source

Perspective of Monitoring Heavy Metals by Moss Visible Chlorophyll Fluorescence Parameters

Frontiers in Plant Science, 2019
Chlorophyll fluorescence measurements have been mainly applied to investigate the functioning of the photosynthetic apparatus in the diagnosis of environmental stress.
Yang-Er Chen, Nan Wu, Zhong-Wei Zhang, Ming Yuan, Shu Yuan   +4 more
doaj   +1 more source

REACTIVITY OF CHLOROPHYLL a/b-PROTEINS AND MICELLAR TRITON X-100 COMPLEXES OF CHLOROPHYLLS a OR b WITH BOROHYDRIDE [PDF]

, 1989
The reaction of several plant chlorophyll-protein complexes with NaBH4 has been studied by absorption spectroscopy. In all the complexes studied, chlorophyll b is more reactive than Chi a, due to preferential reaction of its formyl substituent at C-7 ...
Jan M. Anderson, Porra, R. J., Scheer, Hugo, Anderson, J. M., Robert J Porra, Hugo Scheer, Robert J. Porra   +6 more
core   +1 more source

Subsurface chlorophyll maxima reduce the performance of non-photochemical quenching corrections in the Southern Ocean

Frontiers in Marine Science
Non-photochemical quenching (NPQ) within phytoplankton cells often causes the daytime suppression of chlorophyll fluorescence in the Southern Ocean. This is problematic and requires accurate correction when chlorophyll fluorescence is used as a proxy for
Kimberlee Baldry, Peter G. Strutton, Peter G. Strutton, Peter G. Strutton, Nicole A. Hill, Nicole A. Hill, Philip W. Boyd, Philip W. Boyd   +7 more
doaj   +1 more source