The malate treatment increased leaf malate content, NADPH/NADP ratio, and the initial fluorescence yield
(F0) and decreased photosynthetic oxygen evolution, the maximum fluorescence (Fm), the maximal efficiency of PS II photochemistry (Fv/Fm), and the number of active PSII reaction centers per excited cross section (RC/CSm).
It is on maximum fluorescence yield
, maximum penetration, optimal contrast (signal-to-noise ratio), a low heat input to protect the sample, and the best possible speed in the image pickup to pay for time series.
m], = maximum fluorescence yield
when the reaction centers of PSII are closed by a strong light pulse] and the non-photochemical quenching of the fluorescence [NPQ = ([F.
The addition of the herbicide DCMU induces a fast rise of the fluorescence yield
during the first 2 ms of illumination; it transforms the regular OJIP sequence into an OJ curve (STRASSER et al.
2:00 DISTORTIONS IN 2p4d PARTIAL FLUORESCENCE YIELD
FOR 4d ELEMENTS, Alexander Price, Frank de Groot2 and Trinanjan Datta', 'Georgia Regents University, Augusta, GA 30912 and 2Utrecht University, Netherlands.
The lowering of fluorescence yield
as a result of photoprotective or photoinhibitory processes is quantified by the non-photochemical quenching (NPQ) of Chi a fluorescence based on the variation of maximum fluorescence from dark-adapted to light-adapted state ([F.
Inhibition of the chloroplast photochemical reaction by treatment of wheat seedlings with low concentrations of cadmium: analysis of electron transport activities and changes in fluorescence yield
m]' where F is the fluorescence yield
of the light-adapted sample and [F.
Photosynthesis and chlorophyll fluorescence yield
were measured under laboratory conditions in an effort to determine the feasibility of using fluorescence to model leaf photosynthesis in capsicum (Willits and Peet, 1999).
In vivo, the fluorescence yield
varies between a maximum of between 3% and 5% and a minimum of ca.
However, rather than decrease, the fluorescence yield
increased, in particular in heterozygous samples.
CEA-Leti's new fDOT imaging system enables reconstruction of the fluorescence yield
even inheterogeneous and highly attenuating body regions such as the lungs, and it doesn't require immersing the mice in optical index-matchingliquid.