Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2015, Vol. 31 ›› Issue (16): 47-51.doi: 10.11924/j.issn.1000-6850.casb14100095

Special Issue: 园艺

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Effect of Exogenous Calcium Chloride on Tomato Seedlings Under Chilling Injury Stress

Lian Jie, Gu Jiantian, Zhang Xichun   

  1. (College of Plant Science and Technology, Beijing University of Agriculture/Beijing Key Laboratory of New Technology in Agricultural Application, Beijing 102206)
  • Received:2014-10-23 Revised:2015-05-18 Accepted:2015-03-25 Online:2015-07-27 Published:2015-07-27

Abstract: This experiment aimed to study the role of calcium chloride in improving the chilling tolerance mechanism of tomato seedlings. The author conducted the chilling injury index survey and the measurement of physiological indexes. The materials, which were cold-resistant ‘O-33-1’ and cold-sensitive ‘NY2000’, were treated with light culture box for low temperature treatment. The treatments were named CK, T1, T2, T3 according to different concentrations of calcium chloride. Cold damage index, Chl content, MDA, POD, SOD were measured. When applied with calcium chloride, the cold damage index, MDA and POD of ‘O-33-1’ decreased first and then increased, Chla, Chlb and SOD increased first and then decreased. The cold damage index of ‘NY2000’ decreased first and then increased, SOD increased first and then decreased, MDA content kept an increasing trend, Chla and Chlb were stable. Different tomato varieties had different responses toward exogenous calcium chloride treatments. Under chilling stress, exogenous calcium chloride treatments could protect the stabilization of membrane via enhancing the antioxidant enzymes activities, thus enhance chilling tolerance.