Jin Gao , Lujie Chen , Tang Li , Jinxuan Wen , Rongping Hu , Kuikui Li , Heng Yin
{"title":"Preparation of carboxymethylated curdlan oligosaccharides and application on plant disease control","authors":"Jin Gao , Lujie Chen , Tang Li , Jinxuan Wen , Rongping Hu , Kuikui Li , Heng Yin","doi":"10.1016/j.eurpolymj.2024.113493","DOIUrl":null,"url":null,"abstract":"<div><div>Curdlan is produced by fermentation of microorganisms, which is an insoluble β-(1 → 3)-D-glucans. To better effectively utilize native curdlan, firstly, a derivative from curdlan, carboxymethylated curdlan (CMCD), with different degrees of substitution (DS) DS ∼ 0.20, DS ∼ 0.43 and DS ∼ 0.82 were prepared in this study. Carboxymethylation increases solubility in water more than native curdlan. Moreover, CMCDs were investigated to be hydrolyzed by <em>Cc</em>GluE, an <em>endo</em>-β-1 → 3-glucanase and generated the degradation products were oligosaccharides with degrees of polymerization (DP) mainly ranging from 2 to 7. <em>Cc</em>GluE also showed high thermal and pH stability when CMCD ∼ 0.43 was used as a substrate. Then these oligosaccharides generated by different CMCDs were applied to Arabidopsis and the activity in inducing defense responses were detected after being treated by the pathogen of <em>Pseudomonas syringae pv tomato</em> DC3000 (<em>Pst</em> DC3000). CMCD (DS ∼ 0.20) degradation oligosaccharide (CMCD ∼ 0.20 OS) pre-treatment was the just one that significantly enhanced the disease resistance to <em>Pst</em> DC3000, which is mediated by the salicylic acid (SA) signaling pathway in plants<em>.</em> The findings offer new insights into the application of curdlan, demonstrating that carboxymethylation enhances its solubility in water. Additionally, the oligosaccharide products derived from CMCD degradation show promising prospects for controlling plant diseases in agriculture.</div></div>","PeriodicalId":315,"journal":{"name":"European Polymer Journal","volume":"220 ","pages":"Article 113493"},"PeriodicalIF":5.8000,"publicationDate":"2024-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"European Polymer Journal","FirstCategoryId":"92","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0014305724007547","RegionNum":2,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"POLYMER SCIENCE","Score":null,"Total":0}
引用次数: 0
Abstract
Curdlan is produced by fermentation of microorganisms, which is an insoluble β-(1 → 3)-D-glucans. To better effectively utilize native curdlan, firstly, a derivative from curdlan, carboxymethylated curdlan (CMCD), with different degrees of substitution (DS) DS ∼ 0.20, DS ∼ 0.43 and DS ∼ 0.82 were prepared in this study. Carboxymethylation increases solubility in water more than native curdlan. Moreover, CMCDs were investigated to be hydrolyzed by CcGluE, an endo-β-1 → 3-glucanase and generated the degradation products were oligosaccharides with degrees of polymerization (DP) mainly ranging from 2 to 7. CcGluE also showed high thermal and pH stability when CMCD ∼ 0.43 was used as a substrate. Then these oligosaccharides generated by different CMCDs were applied to Arabidopsis and the activity in inducing defense responses were detected after being treated by the pathogen of Pseudomonas syringae pv tomato DC3000 (Pst DC3000). CMCD (DS ∼ 0.20) degradation oligosaccharide (CMCD ∼ 0.20 OS) pre-treatment was the just one that significantly enhanced the disease resistance to Pst DC3000, which is mediated by the salicylic acid (SA) signaling pathway in plants. The findings offer new insights into the application of curdlan, demonstrating that carboxymethylation enhances its solubility in water. Additionally, the oligosaccharide products derived from CMCD degradation show promising prospects for controlling plant diseases in agriculture.
期刊介绍:
European Polymer Journal is dedicated to publishing work on fundamental and applied polymer chemistry and macromolecular materials. The journal covers all aspects of polymer synthesis, including polymerization mechanisms and chemical functional transformations, with a focus on novel polymers and the relationships between molecular structure and polymer properties. In addition, we welcome submissions on bio-based or renewable polymers, stimuli-responsive systems and polymer bio-hybrids. European Polymer Journal also publishes research on the biomedical application of polymers, including drug delivery and regenerative medicine. The main scope is covered but not limited to the following core research areas:
Polymer synthesis and functionalization
• Novel synthetic routes for polymerization, functional modification, controlled/living polymerization and precision polymers.
Stimuli-responsive polymers
• Including shape memory and self-healing polymers.
Supramolecular polymers and self-assembly
• Molecular recognition and higher order polymer structures.
Renewable and sustainable polymers
• Bio-based, biodegradable and anti-microbial polymers and polymeric bio-nanocomposites.
Polymers at interfaces and surfaces
• Chemistry and engineering of surfaces with biological relevance, including patterning, antifouling polymers and polymers for membrane applications.
Biomedical applications and nanomedicine
• Polymers for regenerative medicine, drug delivery molecular release and gene therapy
The scope of European Polymer Journal no longer includes Polymer Physics.