Plant Diversity ›› 2011, Vol. 33 ›› Issue (3): 299-305.DOI: 10.3724/SP.J.1143.2011.10217

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Suppression of Phospholipase Dδ Enhances the Membrane Damage Induced by UV-B Irradiation

 LI  Yan-1、2, TIAN  Bo-1、3, LI Wei-Qi1   

  1. 1 Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, China;
    2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China;
    3 Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Kunming 650223, China
  • Received:2010-11-29 Online:2011-06-25 Published:2010-12-29


The changes of molecular species in membrane lipids under UV-B irradiation in WS and PLDδ-knockout plants were profiled with ESI-MS/MS based lipidomics. The content of membrane lipids, double bond index (DBI) and carbon number of the fatty acid were examined in both of them. The results showed that UV-B irradiation induced the degradation of membrane lipids, in which chloroplast membrane lipids such as MGDG and DGDG were the main targets of membrane injury. In addition, the degradation of membrane lipid in PLDδ-def was more severe than that in WS plants. The results suggested that suppression of PLDδ enhanced membrane damage induced by UV-B irradiation.

Key words: UV-B, PLDδ, Membrane lipids, Degradation, Double bond index

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