[Fluorescence, excited by light in the 380-540 nm wavelength range, in in cucumber leaves depends on the time of vegetation and light regime].
The slow fluorescence induction produced in cucumber leaves by light in the range of wavelengths 380-540 nm and intensity of 180 W/m2 was studied. The ratio of fluorescence maxima in the red region (F734/F682) in young and mature leaves was approximately 2. It is assumed that this value depends on an increase in the contribution of the long-wavelength fluorescence due to the spillover effect. In plants grown under natural conditions, the parameter F734/F682 correlated with the concentrations of chlorophyll and carotenoids. In plants grown in the light of red and blue regions no such correlation was observed and the F734/F682 remained unchanged. It is concluded that the F534/F682 is affected by the intensity and spectral composition of exciting light used during the growing.
Zavoruev
V V
VV
Institute of Computational Modeling, Siberian Division, Russian Academy of Sciences, Krasnoyarsk, Russia.
Zavorueva
E N
EN
Shelegov
A V
AV
D002338:Carotenoids / Q000378:metabolism; D002734:Chlorophyll / Q000378:metabolism; D018553:Cucumis sativus / Q000254:growth & development / Q000378:metabolism / Q000528:radiation effects*; D005453:Fluorescence; D008027:Light; D018515:Plant Leaves / Q000254:growth & development / Q000378:metabolism / Q000528:radiation effects*
D002734:Chlorophyll; D002338:Carotenoids