improve light harvesting(Matsubara etal.,2009).Under low light conditions( PAR100) plants invest more energy in light harvesting than in biomass production(Matsubara etal.,2009) which was also proven by us in terms of biometric data(Tables S1 andS2).Thinner leaves with larger chloroplasts and higher amounts of chlorophyll improve light harvesting in a light-limited environment (Boardman, 1977). In our study the morphological
adaptations induced changes in the LMA which was 17% lower in plants grown under 100 molm−2 s−1 (Table 1). The modifications in LMA explain why the area based Chl-index was less suitable to detect modifications in the chlorophyll concentration, contrasting the dry weight based analytics. It must also be taken into consideration that alterations in LMA leads to changes in the frequency of photosynthetic reaction centers per leaf area unit that consequently influences net photosynthesis and Fv/Fm as already described for sun and shade leaves