Monitoring gross primary production (GPP) is necessary for quantifying the terrestrial carbon balance. The near-infrared reflectance of vegetation (NIRv) has been proven to be a good predictor GPP. Given that radiation powers photosynthesis, we hypothesized (i) addition photosynthetic photon flux density (PPFD) information NIRv would improve estimates GPP and (ii) further improvement obtained b...

Photosynthetically active radiation (PAR; wavelength 400 ~ 700 nm) is the spectral range of solar used by plants for photosynthesis. PAR data are in various fields research, such as that focusing on surface vegetation growth, light energy–chemical energy conversion process, and terrestrial carbon cycle. In this study, we analyze variability between Global Horizontal Irradiance (GHI) according t...

Light availability and its composition in components affecting plant growth as photosynthetically active radiation (PAR), are of critical importance agricultural environmental research. In this work, data for the period 2009–2014 a forest site Greece were analyzed to identify effect meteorological variables on formation global solar ratio. The temporal changes ratio also discussed. Results show...

It emerged recently that there is an inter-relationship between drought and Ultraviolet-B (UV-B) radiation in plant responses, in that both stresses provoke an oxidative burst. The objective of the present investigation was to study the effect of drought stress, UV-B radiation and the combined effects of UV-B and drought stresses on two cultivars of gourd seedling. The gourd plants were grown w...