Proteomic and physiological responses in mangrove Kandelia candel roots under short-term high-salinity stress

Abstract

Kandelia candel is one of the mangrove species that are most resistant to environmental stress. As a typical nonsalt-secretingmangrove plant, K. candel is an ideal biological material to analyze the molecular mechanism of salt tolerance in woody plants. In thisstudy, changes in protein abundance and expression profile in K. candel roots under high-salinity stress of 600 mmol L–1 NaCl wereanalyzed using isobaric tags for relative and absolute quantification (iTRAQ) assay. Moreover, the physiological parameters associatedwith metabolic pathways in which the differentially abundant proteins (DAPs) are involved were determined. A total of 5577 proteinswere identified by iTRAQ analysis of the K. candel root proteins, of which 227 were DAPs with a fold change ratio >1.2 or a foldchange ratio