Authors: Y Q Yang X F Yi P Prasad
Publish Date: 2009/05/23
Volume: 47, Issue: 1, Pages: 137-140
Abstract
Net photosynthetic rate of yellow upper leaves UL of Ligustrum vicaryi was slightly but not significantly higher than that of green lower leaves LL Diurnally maximum photochemical efficiency of photosystem 2 PS2 Fv/Fm of LL did not significantly decline but the UL showed fairly great daily variations Yield of PS2 of UL showed an enantiomorphous variation to the photosynthetically active radiation and was significantly lower than in the LL Unlike Fv/Fm the efficiency of energy conversion in PS2 and both nonphotosynthetic and photosynthetic quenching did not differ in UL and LL Significant differences between UL and LL were found in contents of chlorophyll Chl a b and carotenoids Car and ratios of Chl a/b Chl b/Chl a+b and Car/Chl a+b Leaf colour dichotocarpism in L vicaryi was mainly caused by different photon utilization sunflecks affected the LL
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