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title: Variations in light energy dissipation in Woodfordia fruticosa leaves during expansion
author: Zhang, S. -B.;  Zhang, J. -L.
Issued Date: 2017
Abstract: Young leaves of tropical trees frequently appear red in color, with the redness disappearing as the leaves mature. During leaf expansion, plants may employ photoprotective mechanisms to cope with high light intensities; however, the variations in anthocyanin contents, nonphotochemical quenching (NPQ), and photorespiration during leaf expansion are poorly understood. Here, we investigated pigment contents, gas exchange, and chlorophyll (Chl) fluorescence in Woodfordia fruticosa leaves during their expansion. Young red leaves had significantly lower Chl content than that of expanding or mature leaves, but they accumulated significantly higher anthocyanins and dissipated more excited light energy through NPQ. As the leaves matured, net photosynthetic rate, total electron flow through PSII, and electron flow for ribulose-1,5-bisphosphate oxygenation gradually increased. Our results provided evidence that photorespiration is of fundamental importance in regulating the photosynthetic electron flow and CO2 assimilation during leaf expansion.
Source: PHOTOSYNTHETICA
Related URLs: 10.1007/s11099-017-0692-5
Appears in Collections:植物生理生态研究组_期刊论文

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Recommended Citation:
Zhang, S. -B.,Zhang, J. -L. Variations In Light Energy Dissipation In Woodfordia Fruticosa Leaves During Expansion[J]. Photosynthetica,2017,55(4):705-715.

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