Chinese Journal of Agrometeorology ›› 2014, Vol. 35 ›› Issue (03): 250-257.doi: 103969/jissn1000-6362201403003

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Effects of UVB Radiation Intensity Variation on Tobacco Photosynthetic Physiology and Chemical Quality

WANG Juan, WANG Yi, CHEN Zongyu , SONG Peng fei   

  1. 1 College of Agronomy and Biotechnology, Yunnan Agricultural University, Kunming 650201, China; 2 Technological Center of Hongta Group, Yuxi 653100
  • Received:2013-08-28 Online:2014-06-20 Published:2015-02-11

Abstract: The UVB radiation intensity in the low latitude plateau of Yunnan tobacco area has important effects on the formation of tobacco yield and quality To reveal the effects of UVB radiation intensity variation on physiological characteristics and chemical quality of tobacco K326, the simulated experiment was conducted by setting photosynthetic level as 0.252 (T0), 0.526 (T1), 0.571(T2) and 0.616 (T3)mW·cm-2, taking the natural environment as the control (CK) The results showed that Pn, Tr and Gs of K326 was greatly influenced by UVB radiation intensity UVB radiation intensity increasing promoted photosynthesis, increased the contents of chlorophyll and carotenoid in tobacco leaf, improved WUE level, and promoted coordination of the chemical composition of tobacco The results could provide theoretical basis for the evaluation the effects of UVB radiation intensity on tobacco

Key words: UVB radiation, Tobacco, Simulation experiment, Photosynthetic physiology, Chemical quality, Ecological adaptation