Effect of chitooligosaccharides with different degrees of acetylation on wheat seedlings under salt stress.
In this study, chitooligosaccharides (COSs) with varying degrees of acetylation (DAs) were applied to wheat seedlings in order to investigate their effect on the plants' defence response under salt stress. The results showed that treatment with exogenous COSs that had different DAs could promote the growth of plants, decrease the concentration of malondialdehyde (MDA), improve the photosynthetic efficiency and enhance the activities of antioxidant enzymes. The mRNA expression level examination of several salt stress response genes suggested that COS could protect plants from the damage of salt stress by adjusting intracellular ion concentration and enhancing the activities of antioxidant enzymes. Furthermore, COS with DA 50% was the most effective in alleviating salt stress to wheat seedlings, which indicated that the activity of COS was closely related with its DAs.
Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Graduate University of the Chinese Academy of Sciences, Beijing 100049, China.
Ping
P
Zou
Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.
Kecheng
K
Li
Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China. Electronic address: sliu@qdio.ac.cn.
Song
S
Liu
Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.
Ronge
R
Xing
Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.
Yukun
Y
Qin
Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China.
Huahua
H
Yu
Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China; Graduate University of the Chinese Academy of Sciences, Beijing 100049, China.
Miaomiao
M
Zhou
Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China. Electronic address: pcli@qdio.ac.cn.
Pengcheng
P
Li
D000107:Acetylation; D000975:Antioxidants / Q000378:metabolism; D002686:Chitin / Q000031:analogs & derivatives* / Q000737:chemistry / Q000378:metabolism; D048271:Chitosan; D018506:Gene Expression Regulation, Plant; D008315:Malondialdehyde / Q000378:metabolism; D009844:Oligosaccharides; D010788:Photosynthesis; D055049:Salt Tolerance; D036226:Seedlings / Q000201:enzymology / Q000235:genetics / Q000502:physiology*; D012965:Sodium Chloride / Q000378:metabolism; D013312:Stress, Physiological; D013482:Superoxide Dismutase / Q000378:metabolism; D014908:Triticum / Q000201:enzymology / Q000235:genetics / Q000502:physiology*
D000975:Antioxidants; D009844:Oligosaccharides; C493484:oligochitosan; D002686:Chitin; D012965:Sodium Chloride; D008315:Malondialdehyde; D048271:Chitosan; D013482:Superoxide Dismutase
Acetylation; Antioxidant enzyme activities; Chitooligosaccharides; Gene expressions; Photosynthesis; Salt stress