Chin J Plant Ecol ›› 2011, Vol. 35 ›› Issue (7): 741-750.DOI: 10.3724/SP.J.1258.2011.00741
Special Issue: 青藏高原植物生态学:生理生态学
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SHI Sheng-Bo1,*(), SHANG Yan-Xia1,2, ZHU Peng-Jin1,2, YANG Li1,2, ZHANG Bo1,3
Published:
2011-08-18
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SHI Sheng-Bo
SHI Sheng-Bo, SHANG Yan-Xia, ZHU Peng-Jin, YANG Li, ZHANG Bo. Effects of solar UV-B radiation on the efficiency of PSII photochemistry in the alpine plant Saussurea superba under different weather conditions in the Qinghai-Tibet Plateau of China[J]. Chin J Plant Ecol, 2011, 35(7): 741-750.
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URL: https://www.plant-ecology.com/EN/10.3724/SP.J.1258.2011.00741
Fig. 1 Comparison of transmittance of ultraviolet and visible light radiation through cellulose diactate and Luminar film. CA, cellulose diactate film; Luminar, Mylar type film; CA-Luminar, difference of transmittance between CA and Luminar film.
Fig. 2 Changes of UV-B radiation intensities and main environmental factors during the treatment of short-term removing UV-B component from natural sunlight under different weather states. Data measured under sunny day were collected at 14:15 on July 23, 2009, cloudy day at 13:45 on July 24, 2009 and shady day at 14:00 on July 26, 2009, respectively. The extremely significant differences (p < 0.001) were exhibited among the results measured from sunny, cloudy, and shady day; and the significant mark did not shown in figures. amb UV-B, ambient UV-B radiation; low UV-B, decreased UV-B radiation; PAR, photosynthetically active radiation; RH, relative humidity of air; Tair, air temperature; UV-B, ultraviolet-B radiation. Vertical bar is SE. ***, p < 0.001.
Fig. 3 Effects of short-term removal of UV-B component from natural sunlight on quantum efficiency of PSII photochemical in Saussurea superba under different weather states. There were extremely significant differences (p < 0.001) among different weather states and significant mark did not shown in figures. amb UV-B, ambient UV-B radiation; low UV-B, decreased UV-B radiation. F(v)/F(m), 3 min dark adapted maximum quantum efficiency of PSII photochemistry; ΦPSII, actual photochemical efficiency of PSII. Vertical bar is SE. *, p < 0.05; **, p < 0.01.
Fig. 4 Effects of short-term removal of UV-B component from natural sunlight on coefficient of photochemical quenching (qP) and non-photochemical quenching (NPQ) in Saussurea superba under different weather states. There were extremely significant differences (p < 0.001) among different weather states and significant mark did not shown in figures. amb UV-B, ambient UV-B radiation; low UV-B, decreased UV-B radiation. Vertical bar is SE. *, p < 0.05; **, p < 0.01.
Fig. 5 Changes of relative limitation of quantum efficiency (L(PFD)) and fraction of opened PSII centers (qL) in Saussurea superba during treatment of short-terms removing UV-B radiation under different weather states. There were extremely significant differences (p < 0.001) among different weather states and significant mark did not shown in figures. amb UV-B, ambient UV-B radiation; low UV-B, decreased UV-B radiation.Vertical bar is SE. *, p < 0.05; **, p < 0.01.
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