Effect of chitooligosaccharides with different degrees of acetylation on wheat seedlings under salt stress

Zou, Ping; Li, Kecheng; Liu, Song; Xing, Ronge; Qin, Yukun; Yu, Huahua; Zhou, Miaomiao; Li, Pengcheng

doi:10.1016/j.carbpol.2015.03.028

Cited by 99 publications

(68 citation statements)

References 41 publications

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“…Hence, the mechanisms that contribute in reduction of ROS and increase the activity of antioxidant enzyme system as well, have crucial roles in imparting tolerance in plants under environmental stress conditions (Abd El-baky et al, 2003). The increase in antioxidant enzyme activity under salt stress has been reported by other several authors (Hassan & Ali, 2014;Zou et al, 2015 andPuyang et al, 2015). Also, high POX activity has proved to correlate with the reduction of plant growth and this increment is considered to have an important role in defense mechanism against salt stress.…”

Section: Discussionsupporting

confidence: 62%

“…This delay of growth has been considered as a sort of plant adaptation to salt stress (Mulholland et al, 2003 andQaderi et al, 2006). Other researchers (Abdel Latef, 2010;Hassan & Ali, 2014;Lee et al, 2014 andZou et al, 2015) ascribed this retardation to either direct toxic effects of saline ions (Na + and Cl -) or indirect effects that may cause soil/plant osmotic imbalance.…”

Section: Discussionmentioning

confidence: 99%

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Exogenous Salicylic acid Ameliorates the Adverse Effects of Salt Stress on Antioxidant System in Rosmarinus officinalis L.

2018

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S ALT stress is a main factor limiting plant growth and productivity. Salicylic acid (SA) has been shown to alleviate the adverse effects of different environmental stresses on plants. To investigate the protective role of salicylic acid (SA) in alleviating salt stress on Rosmarinus officinalis L. (rosemary) plant, a pot experiment was conducted to measure the growth parameters such as plant height and branch number. An antioxidant defense system, represented by catalase (CAT), superoxide dismutase (SOD) and peroxidase (POX), was evaluated at both biochemical and transcriptional levels. NaCl was applied at 0, 25, 50 and 100mM and 0, 0.2 and 0.4mM of SA were used. The exposure of rosemary plant to salt conditions resulted in significant reduction of plant height, branches number and increases in the three measured antioxidant enzyme activities, compared to control. The foliar application of SA effectively increased growth rates and enhanced the activities of CAT, SOD and POX enzymes. The PCR (RT-PCR) analysis revealed that the relative transcript levels of SOD, CAT, and POX genes were changed and up-regulated compared to the control due to NaCl stress and SA treatments, reached the highest expression level by applying 25mM NaCl and 0 SA treatments. The results implied that SA regulated the transcript levels of the antioxidant genes, resulting in the increased contents of antioxidant enzymes and enhanced salt tolerance.

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Section: Discussionsupporting

confidence: 62%

Section: Discussionmentioning

confidence: 99%

Exogenous Salicylic acid Ameliorates the Adverse Effects of Salt Stress on Antioxidant System in Rosmarinus officinalis L.

2018

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“…The weight-average molecular weight (Mw) of WSC1-5 were measured by the method of Zou et al (2015) with some modifications. In brief, the Mw was measured by an Agilent 1,260 gel permeation chromatography (Agilent Technologies, Santa Clara, CA, USA) equipped with a refractive index detector.…”

Section: Methodsmentioning

confidence: 99%

Effect of the molecular weight of water-soluble chitosan on its fat-/cholesterol-binding capacities and inhibitory activities to pancreatic lipase

Qiu

Wang

et al. 2017

PeerJ

Self Cite

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BackgroundObesity has become a worldwide burden to public health in recent decades. Given that obesity is caused by an imbalance between caloric intake and expenditure, and that dietary fat is the most important energy source of all macronutrients (by providing the most calories), a valuable strategy for obesity treatment and prevention is to block fat absorption via the gastrointestinal pathway. In this study, the fat- and cholesterol-binding capacities and the inhibition of pancreatic lipase by water-soluble chitosan (WSC) with different weight-average molecular weight (Mw) were tested and compared in vitro, in order to determine the anti-obesity effects of WSC and the influence of its Mw.MethodsIn this study, WSC with different Mw (∼1,000, ∼3,000, ∼5,000, ∼7,000 and ∼9,000 Da) were prepared by oxidative degradation assisted with microwave irradiation. A biopharmaceutical model of the digestive tract was used to determine the fat- and cholesterol-binding capacity of WSC samples. The pancreatic lipase assays were based on p-nitrophenyl derivatives.ResultsThe results showed that all of the WSC samples exhibit great fat- and cholesterol-binding capacities. Within the testing range, 1 g of WSC sample could absorb 2–8 g of peanut oil or 50–65 mg of cholesterol, which are both significantly higher than the ability of cellulose to do the same. Meanwhile, all the WSC samples were proven to be able to inhibit pancreatic lipase activity to some extent.DiscussionBased on the results, we suggest that there is a significant correlation between the binding capacity of WSC and its Mw, as WSC2 (∼3,000 Da) shows the highest fat- and cholesterol-binding capacities (7.08 g g−1 and 63.48 mg g−1, respectively), and the binding ability of WSC declines as its Mw increases or decreases from 3,000 Da. We also suggest WSC as an excellent resource in the development of functional foods against obesity for its adsorption, electrostatic binding and entrapment of cholesterol, fat, sterols and triglycerides in the diet.

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“…N,N′-diacetylchitotriose, with a high degree of acetylation, has the highest antioxidant activity (Li et al 2013). Furthermore, COS, with a 50% degree of acetylation, was the most effective at alleviating salt stress in wheat seedlings (Zou et al 2015). These results indicated that the activity of COS was closely related to its degrees of acetylation and polymerization.…”

Section: Introductionmentioning

confidence: 71%

Chitin degradation potential and whole-genome sequence of Streptomyces diastaticus strain CS1801

Liu

et al. 2020

AMB Expr

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The aim of this study was to evaluate the chitin degradation potential and whole-genome sequence of Streptomyces diastaticus strain CS1801, which had been screened out in our previous work. The results of fermentation revealed that CS1801 can convert the chitin derived from crab shells, colloidal chitin and N-acetylglucosamine to chitooligosaccharide. Additional genome-wide analysis of CS1801 was also performed to explore the genomic basis for chitin degradation. The results showed that CS1801 possesses a chromosome with 5,611,479 bp (73% GC) and a plasmid with 1,388,284 bp (73% GC). The CS1801 genome consists of 7584 protein-coding genes, 90 tRNA and 21 rRNA operons. In addition, the results of genomic CAZyme analysis indicated that CS1801 comprises 103 glycoside hydrolase family genes, which could regulate the glycoside hydrolases that contribute to chitin degradation. The whole-genome information of CS1801 could highlight the mechanism underlying the chitin degradation activity of CS1801, strongly indicating that CS1801 is characterized by a substantial number of genes encoding chitinases and the complete metabolic pathway of chitin, conferring CS1801 with promising potential applicability in chitooligosaccharide production.

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Effect of chitooligosaccharides with different degrees of acetylation on wheat seedlings under salt stress

Cited by 99 publications

References 41 publications

Exogenous Salicylic acid Ameliorates the Adverse Effects of Salt Stress on Antioxidant System in Rosmarinus officinalis L.

Exogenous Salicylic acid Ameliorates the Adverse Effects of Salt Stress on Antioxidant System in Rosmarinus officinalis L.

Effect of the molecular weight of water-soluble chitosan on its fat-/cholesterol-binding capacities and inhibitory activities to pancreatic lipase

Chitin degradation potential and whole-genome sequence of Streptomyces diastaticus strain CS1801

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