›› 2017, Vol. 29 ›› Issue (9): 1489-1497.DOI: 10.3969/j.issn.1004-1524.2017.09.10

• Horticultural Science • Previous Articles     Next Articles

Effect of salicylic acid and proline on gene expression profiles in response to salt stress in lettuce

WU Jianhua1, 2, WU Zhongxia3, WANG Yuanhua1, 2, FENG Yingna1, 2, *, YAN Zhiming1, 2, CAI Shanya1, WANG Quanzhi1, 2, SUN Ying1   

  1. 1. Jiangsu Polytechnic College of Agriculture and Forestry, Zhenjiang 212400, China;
    2. Jiangsu Engineering and Technology Center for Modern Horticulture, Zhenjiang 212400, China;
    3. Suining County Gaozuo Town Agricultural Technology Extension Service Center, Xuzhou 221200, China
  • Received:2017-03-04 Online:2017-09-20 Published:2017-09-27

Abstract: In order to investigate the role of salicylic acid (SA) and proline (Pro) in alleviating salt stress in plants, a lettuce cultivar ‘Meiguodayesusheng' was used in this study. The lettuce seedlings were grown in hydroponic system under salt stress, and SA and Pro were added to the nutrition solution, respectively. In determination of the morphological and physiological indexes related to salt stress, the results showed that the growth of lettuce seedlings under salt stress was significantly alleviated when treated with 0.2 mmol·L-1 SA and 0.2 mmol·L-1 Pro for 24 hours. The expression levels of the genes related to salt stress were analyzed by RT-PCR and qRT-PCR,and the expression of LSNCED1, LSNCED2 and LSP5CS were remarkably up-regulated under salt stress. These results indicated that 0.2 mmol·L-1 SA and 0.2 mmol·L-1 Pro could reduce the injury to lettuce caused by salt stress to some extent.

Key words: salt stress, lettuce, physiological characteristic, salt-stress related gene, gene expression

CLC Number: