The effect of citric-acid treatment on the physicochemical and gel properties of konjac glucomannan from Amorphophallus bulbifer

Su, Yujie; Zhang, Mianzhang; Chang, Cuihua; Li, Junhua; Sun, Yuhao; Cai, Yundan; Xiong, Wen; Gu, Luping; Yang, Yanjung

doi:10.1016/j.ijbiomac.2022.06.199

Cited by 23 publications

(4 citation statements)

References 36 publications

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“…The absorption band at 1384 cm −1 was ascribed to the C–H bending vibration of methyl from the acetyl group, and the absorption bands at 1154 cm −1 and 1027 cm −1 were attributed to the stretching vibration of C–O–C. The absorption band at 875 cm −1 was ascribed to the glucose and mannose stretching vibration [ 23 ].…”

Section: Resultsmentioning

confidence: 99%

Fabrication and Characterization of Konjac Glucomannan/Oat β-Glucan Composite Hydrogel: Microstructure, Physicochemical Properties and Gelation Mechanism Studies

et al. 2022

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The aim of this study was to evaluate the effect of oat β-glucan on the formation mechanism, microstructure and physicochemical properties of konjac glucomannan (KGM) composite hydrogel. The dynamic rheology results suggested that the addition of oat β-glucan increased the viscoelastic modulus of the composite hydrogel, which was conducive to the formation of a stronger gel network. Gelling force experiments showed that hydrogen bonds and hydrophobic interactions participated in the formation of the gel network. Textural profile analysis results found that the amount of oat β-glucan was positively correlated with the elasticity, cohesiveness and chewiness of the composite hydrogel. The water-holding capacity of the composite hydrogel was enhanced significantly after the addition of oat β-glucan (p < 0.05), which was 18.3 times that of the KGM gel. The thermal stability of KGM gel was enhanced after the addition of oat β-glucan with the increase in Tmax being approximately 30 °C. Consequently, a composite hydrogel based on KGM and oat β-glucan was a strategy to overcome pure KGM gel shortcomings.

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Section: Resultsmentioning

confidence: 99%

Fabrication and Characterization of Konjac Glucomannan/Oat β-Glucan Composite Hydrogel: Microstructure, Physicochemical Properties and Gelation Mechanism Studies

et al. 2022

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“…Konjac is rich in various nutrients, such as KGM, starch, fiber, crude protein, soluble sugars. 7 Many chemical components are removed through dry and wet extraction processes to obtain neat KGM. The KGM is composed of β-1,4-linked D-mannosyl and D-glucosyl residues at approximately 1.6:1 or 1.4:1 molar ratio, [8][9][10][11][12][13][14][15] so it is a water-soluble natural polysaccharide.…”

Section: Introductionmentioning

confidence: 99%

Developing a novel konjac flour/poly-vinyl alcohol composite film: Preparation, properties and characterization

Lang,

Zhang,

Liu

et al. 2024

Journal of Plastic Film & Sheeting

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Developing bio-based plastic has become an important strategy for solving environmental pollution. In this study, konjac flour (KF) and poly-vinyl alcohol (PVA) as main film-forming substances with added citric acid (CA), glutaraldehyde (GA) and glycerin, were used to prepare bio-based composite films via solution casting. How the PVA polymer amount affected the composite films including mechanical performance, structural properties and morphology was investigated. The results revealed that PVA polymer could obviously improve the mechanical property of the films, and the addition of 25% PVA based on KF mass when CA, GA and glycerin were fixed, was demonstrated as the optimal amount, maintaining an excellent tensile strength (TB) and elongation at break (EAB). Fourier transform infrared spectra (FT-IR) and X-ray diffraction (XRD) results indicated the successful cross-linking reaction between PVA and KF, and some further proofs could be confirmed from scanning electron microscopy (SEM) and thermogravimetry (TG). After modification with PVA, the cross section of the KF/PVA composite film was more dense and uniform, implying that PVA was well fused with KF system. Meanwhile, the films modified with PVA presented a good thermal resistance ability. This work provided an effective pathway for preparing KF/PVA composite films with improved mechanical properties, which may be an alternative way for using konjac flour.

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“…High temperature stress is one of the most important environmental stresses that can cause severe and irreversible damage to plants [ 8 , 9 ]. Konjac is a typical shade-tolerant plant, in the past few years, konjac has been frequently exposed to prolonged high temperatures due to climate change [ 10 ]. When the cultivation environment remains hot for a long time, konjac will grow slowly, the leaves will curl gradually, the reduced chlorophyll content leads to leaf discoloration or even wilting, appear symptoms of burn and heat damage, and even collapse and death, seriously affecting the growth, development and the yield of konjac [ 11 ].…”

Section: Introductionmentioning

confidence: 99%

Functional validation of AaCaM3 response to high temperature stress in Amorphophallus albus

Niu,

Zhou,

Yue

et al. 2024

BMC Plant Biol

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Amorphophallus is a perennial monocotyledonous herbaceous plant native to the southwestern region of China, widely used in various fields such as food processing, biomedicine and chemical agriculture. However, Amorphophallus is a typical thermolabile plant, and the continuous high temperature in summer have seriously affected the growth, development and economic yield of Amorphophallus in recent years. Calmodulin (CaM), a Ca2+ sensor ubiquitous in eukaryotes, is the most important multifunctional receptor protein in plant cells, which affects plant stress resistance by participating in the activities of a variety of signaling molecules. In this study, the key gene AaCaM3 for the Ca2+-CaM regulatory pathway was obtained from A. albus, the sequence analysis confirmed that it is a typical calmodulin. The qRT-PCR results demonstrated that with the passage of heat treatment time, the expression of AaCaM3 was significantly upregulated in A. albus leaves. Subcellular localization analysis revealed that AaCaM3 localized on the cytoplasm and nucleus. Meanwhile, heterologous transformation experiments have shown that AaCaM3 can significantly improve the heat tolerance of Arabidopsis under heat stress. The promoter region of AaCaM3 was sequenced 1,338 bp by FPNI-PCR and GUS staining assay showed that the promoter of AaCaM3 was a high-temperature inducible promoter. Yeast one-hybrid analysis and Luciferase activity reporting system analysis showed that the AaCaM3 promoter may interact with AaHSFA1, AaHSFA2c, AaHSP70, AaDREB2a and AaDREB2b. In conclusion, this study provides new ideas for further improving the signal transduction network of high-temperature stress in Amorphophallus.

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The effect of citric-acid treatment on the physicochemical and gel properties of konjac glucomannan from Amorphophallus bulbifer

Cited by 23 publications

References 36 publications

Fabrication and Characterization of Konjac Glucomannan/Oat β-Glucan Composite Hydrogel: Microstructure, Physicochemical Properties and Gelation Mechanism Studies

Fabrication and Characterization of Konjac Glucomannan/Oat β-Glucan Composite Hydrogel: Microstructure, Physicochemical Properties and Gelation Mechanism Studies

Developing a novel konjac flour/poly-vinyl alcohol composite film: Preparation, properties and characterization

Functional validation of AaCaM3 response to high temperature stress in Amorphophallus albus

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