Chlorophyll Fluorescence And Photosynthesis The Basics

The non-invasive and rapid measurement of chlorophyll fluorescence induction allows characterizing the photosynthetic capacity of healthy and infected plants and of parts of them directly in the field. The PI, is highly sensitive not only concerning infection, but also towards other local environmental influences.

Chlorophyll a fluorescence: a bit of basic and history

Chloro-phyll fluorescence: a signature of photosynthesis

Chlorophyll a Fluorescence: A Bit of Basics and History 1.

Bilger, Continuous recording of photochemical and non-photochemical chlorophyll fluorescence quenching with a new type of modulation fluorometer, Photosynth.

Quantitative imaging of chlorophyll fluorescence - …

Greppin, A theoretical and experimental analysis of the qP and qN coefficients of chlorophyll fluorescence quenching and their relation to photochemical and nonphotochemical events, Photosynth.


fluorescence and photosynthesis: The basics.

Fluorescence decrease ratio (Rfd), adaptability and irrigation interval: Chlorophyll fluorescence parameters such as adaptability and fluorescence decrease ratio were affected by change in irrigation interval.

Software for chlorophyll fluorescence analysis OJIP (JIP Test)

Cyanobacteria are ecologically important photosynthetic prokaryotes that also serve as popular model organisms for studies of photosynthesis and gene regulation. Both molecular and ecological studies of cyanobacteria benefit from real-time information on photosynthesis and acclimation. Monitoring in vivo chlorophyll fluorescence can provide noninvasive measures of photosynthetic physiology in a wide range of cyanobacteria and cyanolichens and requires only small samples. Cyanobacterial fluorescence patterns are distinct from those of plants, because of key structural and functional properties of cyanobacteria. These include significant fluorescence emission from the light-harvesting phycobiliproteins; large and rapid changes in fluorescence yield (state transitions) which depend on metabolic and environmental conditions; and flexible, overlapping respiratory and photosynthetic electron transport chains. The fluorescence parameters FV/FM, FV′/FM′,qp,qN, NPQ, and PS II were originally developed to extract information from the fluorescence signals of higher plants. In this review, we consider how the special properties of cyanobacteria can be accommodated and used to extract biologically useful information from cyanobacterial in vivo chlorophyll fluorescence signals. We describe how the pattern of fluorescence yield versus light intensity can be used to predict the acclimated light level for a cyanobacterial population, giving information valuable for both laboratory and field studies of acclimation processes. The size of the change in fluorescence yield during dark-to-light transitions can provide information on respiration and the iron status of the cyanobacteria. Finally, fluorescence parameters can be used to estimate the electron transport rate at the acclimated growth light intensity.

WeisChlorophyll fluorescence and photosynthesis: the basics.

From the present study, it was observed that increase in chlorophyll fluorescence and adaptability had effect on the growth of the tomato plant which was in agreement with . They reported that chlorophyll fluorescence indirectly measures photosynthesis efficiency.

Chlorophyll fluorescence and photosynthesis: The basics

reported that chlorophyll fluorescence indirectly measures photosynthesis efficiency. If a leave is placed in a dark for a couple of minutes and then is returned to the light, fluorescence quickly rises to an initial level (FO). Fluorescence increases from FO to its maximum (FM) due to the rapid decrease of electron accepting QA (quinone-type acceptor) molecules. The variable fluorescence (FV) is the difference between FM and FO and is extremely sensitive to changes in the ultrastructure of membranes and rates of electron transfer. Hence FV/FM can be presented as the yield of photochemical reaction ().

“Chlorophyll fluorescence and photosynthesis: the basics ..

also assessed the photosynthetic activities of different chlorophyll containing part of tomato plants. They concluded that the non-leaf green tissues of tomato are quite active photosynthetically and therefore potentially contribute significantly to plant growth which was in agreement with the present study.