期刊
PLANT PHYSIOLOGY AND BIOCHEMISTRY
卷 51, 期 -, 页码 74-80出版社
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.plaphy.2011.10.011
关键词
Cucumber; Hypoxic stress; Plant biomass; Proteomics
资金
- National Basic Research Program of China (973 Program) [2009CB119000]
- National Nature Science Foundation of China [30871736, 30900995, 31071831]
- Jiangsu Higher Education Institutions
- earmarked foundation for Modern Agro-industry Technology Research System [CARS-25-C-03]
To elaborate the mechanisms of response of cucumber (Cucumis sativus L cv.) seedlings to hypoxic stress, plants were grown under either normoxic conditions or hypoxic stress. As expected, plant biomass was significantly reduced under hypoxic stress. Proteomic profiles of cucumber roots were studied at 72 h after treatment; 316 and 425 protein spots were detected on polyacrylamide gels from normoxic and hypoxic-treated plants, respectively. Compared with normoxic-treated plants, protein abundance of 22 proteins was significantly upregulated while protein abundance of 12 proteins decreased in the hypoxic-treated plants. Twenty one of the proteins whose abundance was altered were identified by MALDI-TOF/TOF MS analysis, and categorized into classes corresponding to energy and metabolism proteins, transcription factor proteins, defense stress proteins, structural proteins and regulatory proteins. Under hypoxic stress, glycolysis was induced; energy was channeled to primary metabolism, while secondary pathways and nitrogen metabolism pathways were inhibited. Cucumber plants scavenged reactive oxygen species by antioxidase, and increased Acyl-[acyl-carrier-protein] desaturase which defend against reactive oxygen species damage to plant cell structure. This study provides insight that may facilitate a better understanding of the response mechanisms of cucumber plant to hypoxic stress. (C) 2011 Elsevier Masson SAS. All rights reserved.
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