title: Effect of Sulfated Chitooligosaccharides on Wheat Seedlings (Triticum aestivum L.) under Salt Stress.
abstract: In this study, sulfated chitooligosaccharide (SCOS) was applied to wheat seedlings to investigate its effect on the plants' defense response under salt stress. The antioxidant enzyme activities, chlorophyll contents, and fluorescence characters of wheat seedlings were determined at a certain time. The results showed that treatment with exogenous SCOS could decrease the content of malondialdehyde, increase the chlorophyll contents, and modulate fluorescence characters in wheat seedlings under salt stress. In addition, SCOS was able to regulate the activities of antioxidant enzymes containing superoxide dismutase, catalase, peroxidase, ascorbate peroxidase, glutathione reductase, and dehydroascorbate reductase. Similarly, the mRNA expression levels of several antioxidant enzymes were efficiently modulated by SCOS. The results indicated that SCOS could alleviate the damage of salt stress by adjusting the antioxidant enzyme activities of plant. The effect of SCOS on the photochemical efficiency of wheat seedlings was associated with its enhanced capacity for antioxidant enzymes, which prevented structure degradation of the photosynthetic apparatus under NaCl stress. Furthermore, the effective activities of alleviating salt stress indicated the activities of SCOS were closely related with the sulfate group.
authors.affiliation: Institute of Oceanology, Chinese Academy of Sciences , Qingdao 266071, China.|Institute of Tobacco Research of CAAS , Qingdao 266101, China.
authors.forename: Ping
authors.initials: P
authors.lastname: Zou
authors.affiliation: Institute of Oceanology, Chinese Academy of Sciences , Qingdao 266071, China.
authors.forename: Kecheng
authors.initials: K
authors.lastname: Li
authors.affiliation: Institute of Oceanology, Chinese Academy of Sciences , Qingdao 266071, China.
authors.forename: Song
authors.initials: S
authors.lastname: Liu
authors.affiliation: Institute of Oceanology, Chinese Academy of Sciences , Qingdao 266071, China.
authors.forename: Xiaofei
authors.initials: X
authors.lastname: He
authors.affiliation: Institute of Oceanology, Chinese Academy of Sciences , Qingdao 266071, China.
authors.forename: Xiaoqian
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Institute of Oceanology, Chinese Academy of Sciences , Qingdao 266071, China.
authors.forename: Ronge
authors.initials: R
authors.lastname: Xing
authors.affiliation: Institute of Oceanology, Chinese Academy of Sciences , Qingdao 266071, China.
authors.forename: Pengcheng
authors.initials: P
authors.lastname: Li
mesh_terms: D060387:Ascorbate Peroxidases / Q000235:genetics / Q000378:metabolism; D002686:Chitin / Q000031:analogs & derivatives* / Q000378:metabolism; D048271:Chitosan; D005980:Glutathione Reductase / Q000235:genetics / Q000378:metabolism; D009844:Oligosaccharides; D010940:Plant Proteins / Q000235:genetics / Q000378:metabolism; D055049:Salt Tolerance; D036226:Seedlings / Q000201:enzymology / Q000235:genetics / Q000254:growth & development / Q000378:metabolism*; D012965:Sodium Chloride / Q000378:metabolism*; D013482:Superoxide Dismutase / Q000235:genetics / Q000378:metabolism; D014908:Triticum / Q000201:enzymology / Q000235:genetics / Q000254:growth & development / Q000378:metabolism*
chemical_list: D009844:Oligosaccharides; D010940:Plant Proteins; C493484:oligochitosan; D002686:Chitin; D012965:Sodium Chloride; D048271:Chitosan; D060387:Ascorbate Peroxidases; D013482:Superoxide Dismutase; D005980:Glutathione Reductase
keywords: antioxidant enzyme activities; gene expression; photochemical efficiency; salt stress; sulfated chitooligosaccharides; wheat