Authors:Kumar, R; Pal, M; Teotia, U.V.S
Abstract:Diurnal changes in chlorophyll uorescence characteristics in leaves of four bamboo species (Guadua angustifolia, Bambusa tulda, Dendrocalamus giganteus and Dendrocalamus strictus) grown under nursery conditions were recorded in June 2001. Photochemical ef ciency of photosystem (PS) 2 measured as Fv=Fm ratio, varied with species and with the time of observation. Absolute parameters of chlorophyll uorescence (F0, Fm and Fv) and Fv=Fm ratio were increased signi cantly from morning (1000 h) to afternoon (1600 h) in all species. G. angustifolia and B. tulda showed midday depression in Fv=Fm ratio at 1400 h while the othertwo speciesshowed only constant values of Fv=Fm ratio for one hour. Hence, the chlorophyll uorescence characteristics and midday depression in Fv=Fm ratio is speciesspeci
Keywords:Chlorophyll; fluorescence