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Bulletin of Botanical Research ›› 2005, Vol. 25 ›› Issue (2): 159-162.doi: 10.7525/j.issn.1673-5102.2005.02.011

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Effects of different light intensity after low night temperature stress on PSII functions and absorbed light allocation in leaves of Ficus microcarpa

HUWen-Hai1,2, XIAO Yi-An1, YU Jing-Quan2, HUANG Li-Feng2   

  1. 1. Department of Life Science, Jinggangshan Normal College, Ji'an 343009;
    2. Department of Horticulture, Zhejiang University, Hangzhou 310029
  • Received:2004-09-21 Online:2005-06-15 Published:2016-06-14

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Abstract: In this study, the effects of full sunlight and shade after natural low night temperature on PSII functions and light allocation in leaves of Ficus microcarpa was examined. Under full sunlight after low night temperature, the allocation of light absorbed by PSII antennae to the photochemical reaction decreased, but the allocation of absorbed light to thermal dissipation and excessive energy increased. So it resulted the decrease of the PSII functions. Though the allocation of absorbed light to thermal dissipation decreased, shade after low night temperature can decrease excessive energy of PSII reaction centers by increase of fraction of light absorbed in PSII antennae that was utilized in PSII photochemistry, and protect the photosynthetic apparatus not to be injured. So shade after low night temperature was beneficial to recover PSII functions.

Key words: Ficus microcarpa, low night temperature stress different light intensity, PSII functions, absorbed light allocation