Literature DB >> 25517199

Signaling role of phospholipid hydroperoxide glutathione peroxidase (PHGPX) accompanying sensing of NaCl stress in etiolated sunflower seedling cotyledons.

Prachi Jain1, Satish C Bhatla.   

Abstract

Sunflower seedlings subjected to 120 mM NaCl stress exhibit high total peroxidase activity, differential expression of its isoforms and accumulation of lipid hydroperoxides. This coincides with high specific activity of phospholipid hydroperoxide glutathione peroxidase (PHGPX) in the 10,000g supernatant from the homogenates of 2-6 d old seedling cotyledons. An upregulation of PHGPX activity by NaCl is evident from Western blot analysis. Confocal laser scanning microscopic (CLSM) analysis of sections of cotyledons incubated with anti-GPX4 (PHGPX) antibody highlights an enhanced cytosolic accumulation of PHGPX, particularly around the secretory canals. Present work, thus, highlights sensing of NaCl stress in sunflower seedlings in relation with lipid hydroperoxide accumulation and its scavenging through an upregulation of PHGPX activity in the cotyledons.

Entities:  

Keywords:  CLSM, confocal laser scanning microscopy; GPX, glutathione peroxidase; LHPO, lipid hydroperoxide; PHGPX, phospholipid hydroperoxide glutathione peroxidase; POD,peroxidase; ROS, reactive oxygen species.; glutathione peroxidase; lipid hydroperoxides; phospholipid hydroperoxide glutathione peroxidase; salt stress; seedling cotyledons; sunflower

Mesh：

Substances：

Year:  2014        PMID： 25517199      PMCID： PMC4623265          DOI： 10.4161/15592324.2014.977746

Source DB:  PubMed          Journal:  Plant Signal Behav        ISSN： 1559-2316


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