Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5157255 | Carbohydrate Polymers | 2017 | 9 Pages |
Abstract
In this study, six fully deacetylated single chitooligomers (COSs, chitobiose to chitoheptaose) and one fully deacetylated COS mixture were applied to wheat seedlings to investigate their effects on the plants' defence response under chilling stress. The results showed that exogenous COS with different degrees of polymerization (DPs) could promote the growth of plants, decrease the concentration of malondialdehyde (MDA), increase the content of chlorophyll and modulate the activities of antioxidant enzymes. The analysis of genes expression suggested that COS could alleviate the damage of chilling stress by effectively regulating the expression of antioxidant enzyme genes. Furthermore, chitohexaose and chitoheptaose had the most effective activities of alleviating chilling stress to wheat seedlings, which suggested the DP played important roles in the activities of COS. The close relationship between the activities of COSs and their DPs reveals that the activities of COSs are dependent upon a specific structure to interact with elicitor receptors on plant cell membrane.
Keywords
PSIIMDAChitooligomerChitooligomersCOSqRT-PCRAPXTCATBACATPODO2−OH−ROSHydrogen peroxideChilling stresstrichloroacetic acidThiobarbituric acidDegree of deacetylationdegree of polymerizationsuperoxide radicalHydroxyl radicalSODSuperoxide dismutasePhotosystem IIAntioxidant enzyme activitiesmalondialdehydeH2O2fresh weightascorbate peroxidaseCatalaseReactive oxygen species
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Ping Zou, Xueying Tian, Bing Dong, Chengsheng Zhang,