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Bulletin of Botanical Research ›› 2010, Vol. 30 ›› Issue (6): 703-707.doi: 10.7525/j.issn.1673-5102.2010.06.014

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Effects of Increased Endogenous Ethylene on Plant Salt Tolerance in Arabidopsis Seedlings under Saline Condition

LIN Ying-Chao;YANG Lei;ZHAO Xiao-Ju;TANG Zhong-Hua*   

  1. 1.Key Laboratory of Forestry Plant Ecology,Ministry of Education,Northeast Forestry University,Harbin　150040；2.Shanghai Chenshan Plant Science Research Center,Chinese Academy of Sciences,Shanghai　201602；3.Department of life science,Daqing Normal University,Daqing　163712
  • Received:1900-01-01 Revised:1900-01-01 Online:2010-11-20 Published:2010-11-20
  • Contact: TANG Zhong-Hua
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Abstract: The effects of endogenous ethylene on plant salt tolerance in Arabidopsis seedlings in exposure to salinity were investigated in the present work. The results showed that 100 mmol·L-1 NaCl significantly decreased seedling root elongation and root fresh weight. Application of exogenous ethephon obviously alleviated salt-induced inhibition of root length and biomass accumulation. Comparatively, exogenous ACC had a positive effect merely on alleviating root weight inhibition caused by salt stress. The root ROS level in salt-stressed seedlings was also increased drastically, and both ethephon and ACC could keep the root ROS level at a low level as control under NaCl stress conditions. It was proposed that improvement of Arabidopsis salt tolerance induced by ethylene is tightly related to root redox state.

Key words: ethylene, Arabidopsis, salt tolerance, oxidative stres

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