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Acta Agron Sin ›› 2015, Vol. 41 ›› Issue (06): 956-962.doi: 10.3724/SP.J.1006.2015.00956

• TILLAGE & CULTIVATION · PHYSIOLOGY & BIOCHEMISTRY • Previous Articles     Next Articles

Effect of Salicylic Acid on Growth and Nutrient Uptake in Hydroponic Tobacco under Cu Stress

XU Gen-Di1,2,GE Shu-Fang1,2,ZAHNG Yi3,WU Yu-Huang4,MEI Xiao-Man5,LIU Peng1,2,*   

  1. 1 Research Institute of Ecology, Zhejiang Normal University, Jinhua 321004, China; 2 Key Laboratory of Botany / Zhejiang Normal University, Jinhua 321004, China; 3 Tourism College of Zhejiang, Hanzhou 311231, China; 4 College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 310036, China; 5 College of Biological and Environmental Sciencess, Hanzhou Normal University, Hangzhou 330036, China
  • Received:2014-10-27 Revised:2015-04-02 Online:2015-06-12 Published:2015-04-14

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Abstract:

A hydroponic experiment was conducted to study the effects from treatmeats including CK ( Cu2+ 0 mg L–1, SA 0 μmol L–1 as control), T1 (Cu2+ 4 mg L–1, SA 0 μmol L–1), T2 (Cu2+ 4 mg L–1, SA 100 μmol L-1), T3 (Cu2+ 4 mg L–1, SA 300 μmol L–1), T4 (Cu2+ 4 mg L–1, SA 500 μmol L–1)on growth characteristics, elements absorption and accumulation in two tobacco cultivars, N. tabacum cv. W38 (Cu resistant genotype) and N. benthamiana (Cu sensitive genotype) under copper stress. The result showed that the growth of two tobacco cultivars under 4 mg L–1 Cu stress for 15 days was inhibited to some extent, meanwhile, the content of Cu in their organs was increased while the absorptions of K, Ca, Mg, Fe, Zn, B, and Mn were inhibited. The addition of exogenous SA could alleviate the inhibition of plant height, root length and fresh weight, and reduce Cu content of tobacco, but increase the absorption of nutritional elements K, Ca, Mg, Fe, and Mn. Compared with treatment T1, contents of Cu in root, stem and leaf were increased by 25.05%, 39.78%, 22.91% in N. benthamiana, and by 23.27%, 37.30%, 28.88% in N. tabacum cv.W38, respectively. In conclusion, appropriate concentration of SA promotes the growth and elements absorption in tobacco under copper stress. In this experiment, 300 μmol L–1SA could significantly alleviate copper inhibition to tobacco.

Key words: Salicylic acid, Cu stress, Tobacco, Trace elements

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