Red/blue light ratio strongly affects steady‐state photosynthesis, but hardly affects photosynthetic induction in tomato (Solanum lycopersicum)

• DOI: 10.1111/ppl.12876
• Publication Date: 2018-11-14T07:23:36Z
• Authors: Yuqi Zhang; Elias Kaiser; Yating Zhang; Qichang Yang; Tao Li
• Keywords: Far-red; Light intensity; Photosynthetic capacity

Plants are often subjected to rapidly alternating light intensity and quality. While both short‐ long‐term changes in red blue affect leaf photosynthesis, their impact on dynamic photosynthesis is not well documented. It was tested how steady‐state photosynthetic traits were affected by red/blue ratios, either during growth or measurements, tomato leaves. Four ratios used: monochromatic (R 100 ), (B a ratio of 9:1 90 B 10 ) 7:3 70 30 ). R grown leaves showed decreased capacity (maximum rates light‐saturated carboxylation, electron transport triose phosphate use), thickness nitrogen concentrations. Acclimation various had limited effects induction dark‐adapted ‐grown approximately 15% larger initial NPQ transient than the other treatments, which may be beneficial for photoprotection under fluctuating light. also faster stomatal closure when exposed low intensity, likely resulted from smaller stomata higher density. When measured different opening rate hardly accelerated increased fractions chamber‐grown greenhouse‐grown However, min after strongly reduced measurement. We conclude that varying measurement affects but has rate.