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Various authors have described algae in aquatic Utricularia traps as commensals, as stress factors or as prey. This study examined the diversity and abundance of organisms (prey, algae, protozoa and bacteria) in the traps of aquatic Utricularia reflexa in relation to prey occurrence and trap age. The number of organisms increased with the trap age. In both young and old traps, phytoplankton dominated...
Detached leaves of 14 day-old dark-grown pea seedlings were immersed with their cut ends either in water (control) or in 20 mM Pb(NO3)2 solution. They were exposed to continuous illumination during 24 and 48 h. The formation of PSII primary photochemistry in thylakoids was determined in vivo by measuring changes in values of parameters of chlorophyll a fast fluorescence kinetics: Fo, Fm, Fv, Fv/Fm...
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