Plant Diversity ›› 2009, Vol. 31 ›› Issue (04): 326-334.DOI: 10.3724 SP.J.1143.2009.09033

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The Response of AtCER to Oxidative Stress in Arabidopsis thaliana

LIU Run-Hua1 , 2 , JIANG Wen-Bo1 , 2 , YU Di-Qiu1   

  1. 1 Xishuangbanna Tropical Botanical Garden , Chinese Academy of Sciences, Kunming 650223 , China;
    2 Graduate University of Chinese Academy of Sciences, Beijing 100049 , China
  • Received:2009-02-23 Online:2009-08-25 Published:2009-08-25
  • Contact: YU Di-Qiu

Abstract: Ceramide is a second messenger involved in many significant signal pathways of plants, such as cell growth, reduplication, differentiation, senescence and apoptosis . This work investigated the AtCER function in oxidative stress caused by H2O2 . The leaves of AtCER mutants cer1 , cer2 and cer3 , exhibited more severe levels of yellowing and necrotic lesions
than wild- type with H2O2 treatment . Further investigation by the physiological and biochemical methods, indicated that chlorophyll content of these mutants decreased more quickly than do wild type plants, and their conductivity increased significantly , and the antioxidases activity in leaves of AtCER mutants were approximately 1.5 or 3-fold higher than that inwild - type after H2O2 treatment . All of those results suggested that AtCER may involved in H2O2 -induced Oxidative stress.

Key words: Arabidopsis thaliana

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