Eighth Meeting of the Yugoslav Society for Plant Physiology
Year: 1988
Type: conference-paper
Abstract: In stitute o f F ield and V egetab le Crops, N ovi Sad) Characteristic reactions of photosynthesis can be measured simul taneously in photosynthetic material, under the influence of variable environmental conditions, by the application of modern nondestructive methods.By simultaneous measurements of gas exchange (C02 and O,), chlorophyll a fluorescence and light scattering in the leaf, isolated proto plasts, and chloroplasts, data were obtained on the interaction of photo chemical and biochemical processes and transport mechanisms in photosyntheis (Walker, 1987).Complex measurements of photosynthesis have contributed to a better understanding of regulatory mechanisms of photo synthesis and to an early detection of disorders in plant metabolism cau sed by stress, high or low temperature, drought, diseases and chemicals.The results are presented on the simultaneous measurements of pho tosynthetic oxygen evolution and chlorophyll a fluorescence in the leaves of sunflower (Helianthus annuus L.) by the application of a modified oxygen electrode.Complex kinetics of oxygen evolution and chlo rophyll a fluorescence were measured in the presence of saturat ing C02 as a function of light intensity.Leaves were studied at different stages of plant development.Data were obtained on potential maximum rates and quantum yield of photosynthetic oxygen evolution for some wild varieties, parental lines and NS sunflower hybrids.Early effects of photoinhibition on photosynthetic reactions were detected.The significance of complex measurements of photosynthesis in the course of plant growth and development is discussed in relation to biomass production and yield formation.Wa.lk.er,D. A ., 1987: The u se of the o x y g e n electrod e and flu o rescen ce probes in sim ple m easu rem en ts of p h o to syn th esis.P ackard P u b lish in g Ltd.C hichester.1-144.
Language: English
Subfield: Molecular Biology
Domain: Life Sciences
Open Access status: green
OpenAlex ID: W7037537438