Biotechnology Bulletin ›› 2017, Vol. 33 ›› Issue (8): 95-102.doi: 10.13560/j.cnki.biotech.bull.1985.2017-0262

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Effects of Spermine and Spermidine on Gaseous Formaldehyde Absorption and Physiological Property in Tobacco Leaves

SI Zhi-hao, WANG Ru, FENG Yong, GUO Hong-xia, CHEN Yue, CHEN Li-mei   

  1. Faculty of Life Science and Biotechnology,Kunming University of Science and Technology,Kunming 650500
  • Received:2017-04-01 Online:2017-08-01 Published:2017-08-01

Abstract: This work is to investigate the role and the mechanism of polyamine during the plants response to gaseous formaldehyde stress. With pretreatment of 100 μmol/L spermine and 200 μmol/L spermidine to model plant tobacco,the formaldehyde absorption of tobacco leaves,chlorophyll content,physiological indexes of peroxidation,formaldehyde metabolism,and the activities of the four main antioxidant enzymes(POD,CAT,APX and SOD)under gaseous formaldehyde stress were determined. The results showed that:1)The absorption efficiency of tobacco under 1,3 and 5 mg/m3 gaseous formaldehyde significantly increased by the pretreatment with spermine and spermidine,and the effect by spermine was better than that by spermidine. 2)Under gaseous formaldehyde stress,the pretreatment of spermine and spermidine delayed the degradation of chlorophyll b,and the accumulations of H2O2 and MDA in tobacco leaves were also inhibited. Besides,the activities of POD,CAT,APX and SOD were enhanced at varied degree with the pretreatment of spermine and spermidin under gaseous formaldehyde stress. 3)The pretreatment of spermine and spermidine presented no promotion on the metabolism of gaseous formaldehyde in tobacco.

Key words: polyamine, tobacco, formaldehyde absorption, formaldehyde stress, antioxidant enzyme