Acid Induction Research Articles

Overexpression of acdS gene encoding 1-aminocyclopropane-1-carboxylic acid deaminase enzyme in petunia negatively affects seed germination.

Overexpression of acdS in petunia negatively affects seed germination by suppression of ethylene biosynthesis and signaling genes and induction of abscisic acid biosynthesis genes in the seeds. The acdS gene, which encodes 1-aminocyclopropane-1-carboxylic acid (ACC) deaminase, has been overexpressed in horticultural crops to improve their tolerance to abiotic stress. However, the role of acdS in the germination of crop seeds has not been investigated, despite its suppression of ethylene production. In this study, acdS overexpression significantly reduced seed weight and germination rate in transgenic petunia cv. Merage Rose (T5, T7, and T12) relative to wild type via the suppression of ethylene biosynthesis and signaling genes and induction of abscisic acid (ABA) biosynthesis genes. The germination rate of T7 was significantly lower than those of T5 and T12, which was linked to higher expression of acdS in the former than the latter. The addition of exogenous ACC and gibberellic acid (GA3) to the germination medium improved the germination rate of T5 seeds and GA3 promoted the germination rate of T12 seeds. However, neither ACC nor GA3 promoted the germination rate of T7 seeds. The improved germination rates in T5 and T12 were associated with the transcriptional regulation of ethylene biosynthesis genes, particularly that of the ACO1 gene, signaling genes, and ABA biosynthesis genes. In this study, we discovered a negative role of acdS in seed germination in petunia. Thus, we highlight the need to consider the negative effect of acdS on seed germination when overexpressing the gene in horticultural crops to improve tolerance to abiotic stress.

RETRACTED: Alternative oxidase is involved in leaf senescence via regulation of Salicylic acid accumulation in tomato

This article has been retracted: please see Elsevier Policy on Article Withdrawal (https://www.elsevier.com/locate/withdrawalpolicy). This article has been retracted at the request of the corresponding author, Yu Wen, and the Editor-in-Chief. The corresponding author requested retraction, due to multiple self-reported issues and breaches of scientific ethical standards. The Editor-in-Chief no longer has trust in the veracity of the findings in the paper and therefore decided to retract it. This paper was submitted to the journal by Yu Wen without the knowledge or permission of the co-author Dawei Zhang. Authors submitting to the journal warrant that the publication is approved by all authors. As Dawei Zhang did not agree to be a co-author on the paper, this is a clear breach of the submission requirements for the journal, as well a breach of scientific ethical standards. As well as the issue with the authorship, there are problems with the veracity of the data published in the article. Specifically, there is a duplication of Fig 1g and Fig 2a. The corresponding author Yu Wen has indicated that the relevant experiments in the article are inadequate and the conclusions cannot be characterized by physiological data alone, especially in the fourth figure where further relevant molecular experiments need to be designed to refine the conclusion.

Extrinsic hyaluronic acid induction differentially modulates intracellular glutamine metabolism in breast cancer stem cells

The effect of low and high molecular weight hyaluronic acid on glutamine metabolism in luminal and basal breast cancer and cancer stem cells is being investigated. In luminal cell lines (MCF-7), HA enhances the intracellular utilization of gln in redox metabolism and decreases its use in TCA. On the contrary, in MDAMB-231 cells, HA induces the uptake of gln to be utilized in anaplerosis rather than ROS maintenance. However, in MCF-7 CSCs, HA induces up-regulation of xCT, further, it uses gln-derived glutamate for the exchange of cystine, thus maintaining ROS levels through xCT. MDA-MB-231 CSCs reduce the secretion of glutamate in response to HA and decrease the gln flux towards reductive carboxylation. Conclusively, our study demonstrated that although the uptake of gln is enhanced by HA, it is differentially utilized intracellularly in breast cancer cells. This study could significantly influence the therapeutics involving HA and Gln in breast cancer.

Identification and Expression Analysis of Stilbene Synthase Genes in Arachis hypogaea in Response to Methyl Jasmonate and Salicylic Acid Induction

Stilbene synthase is an important enzyme of the phenylpropanoid pathway, regulating the production of several biologically active stilbenoids. These compounds have antioxidant, anti-inflammatory, and anti-cancer properties. However, the detailed characterization of stilbene synthase genes in Arachis hypogaea has not yet been performed. In this study, the comprehensive characterization of stilbene synthase genes in A. hypogaea was conducted, commencing with identification, phylogenetic analysis, and study of their expression in response to exogenous hormonal treatment. We identified and isolated five AhSTSs genes and recorded their expression pattern in peanut (BARD-479) in response to methyl jasmonate (MeJA) and salicylic acid (SA) treatment. The presence of Chal_sti_synt, ACP_syn_III, and FAE1_CUT1_rppA domains in all AhSTSs indicated their role in the biosynthesis of stilbene and lipid metabolism. Cis-regulatory element analysis indicated their role in light responsiveness, defense responses, regulation of seed development, plant growth, and development. Despite close structural and functional similarities, expression and correlational analysis suggested that these genes may have a specific role in peanut, as individual AhSTS exhibited differential expression upon hormonal treatment in a genotype dependent manner. Further studies on functional characterization involving the transcriptional regulation of AhSTSs can clearly explain the differential expression of stilbene synthase genes to hormonal treatment.

Analysis of Phenol, Reducing Sugar, and Chlorophyll of Dendrobium sp. plantlet after induction of fusaric acid In Vitro

Analysis of Phenol, Reducing Sugar, and Chlorophyll of Dendrobium sp. plantlet after induction of fusaric acid In Vitro

Analysis of Phenol, Reducing Sugar, and Chlorophyll of Dendrobium sp. plantlet after induction of fusaric acid In Vitro

Orchids are ornamental plants with varied and beautiful flower colors and are much favored by the public. Orchid plants have a higher economic value when compared to other ornamental plants, both as cut flowers and potted flowers. In the process of growth, orchid plants are disturbed, namely Fusarium wilt disease caused by Genus Fusarium which can produce a toxin compound, namely fusaric acid which is widely used in in vitro selection of plants. Plant resistance can be formed through the induction of fusaric acid compounds. Induced resistance is an alternative way to obtain disease-resistant plants because plants are able to create natural resistance mechanisms. The purpose of this study was to determine the concentration of tolerant fusaric acid to select Dendrobium orchid plantlets with optimal growth and specific expression characters of Dendrobium orchid plantlets based on phenol content, reducing sugar content, and total chlorophyll content, chlorophyll a and chlorophyll b. The results of this study indicated that there was an increase in total phenol content, reducing sugar content, and total chlorophyll content, chlorophyll a and chlorophyll b along with the addition of fusaric acid concentration.

Analgesic and Antipyretic Effects of Jamblang (Syzygium cumini (l). Skeel) Leaves Ethanol Extract

Analgesic-antipyretic is a compound used to reduce pain and fever. This study aims to determine whether the ethanol extract of Syzygiumium cumini leaves has analgesic and antipyretic activity in mice (Mus musculus) induced by acetic acid and peptone. The method used was the Writhing method with acetic acid induction fanalgesiasic and the rectal temperature measurement method for antipyretic testing. This research was started by extracting Syzygium cumini (L.) Skeels leaves with 70% ethanol solvent by maceration. Syzygium cumini (L.) Skeels leaves extract was then tested in 5 groups the s, positive control growth as up given paracetamol for antipyretic testing and mefenamic acid for analgesic testing, negative control group ( Na.CMC suspension), a dose of 6 mg/Kg, 9 mg/Kg and 12 mg/Kg of body weight. The results indicate that the ethanol extract Syzygiumium cumini leaves has analgesic and antipyretic activity at all treatment doses and the most effectivect is at a dose of 6 kg BW
 KEYWORD : Syzygium cumini (L) Skeels, Mice, Analgesic, Antipyretic

A review on chilling injury and antioxidant metabolism of pineapple (Ananas comosus)

Pineapple (Ananas comosus) is an economically significant crop as Malaysia is one of the countries that produce and export pineapples. Improper postharvest management is one of the factors that will adversely affect crop yields. Low-temperature storage is a commonly used postharvest technology to prolong fruit life and maintain its condition. This review is conducted to understand the chilling injury (CI) and antioxidant metabolism in pineapple fruits. CI can be divided into: i) causes and symptoms that appeared on chilled-injured crops, and ii) the mechanism associated with plants injured by chilling temperature while antioxidant metabolism can be divided into; i) mechanism of action and ii) classification of antioxidants. There are two leading theories associated with the source of CI which is membrane variability that relates to fatty acid and reactive oxygen species (ROS) induction. Antioxidants have many benefits, especially to human health and different antioxidants can have different beneficial effects. Understanding the cause, symptoms and action mechanism of CI will contribute to early prevention and proper crop handling practices. CI was also understood to have a correlation with antioxidant metabolism that relates to ROS. This review provides a collection of information and an in-depth understanding of CI and antioxidants in pineapple thus, it is extremely helpful for researchers to create new studies or make further research on existing studies because they can see the shortcomings entirely. Research and studies on CI and antioxidants in pineapple are believed to have prominent economic values.

Induction of rosmarinic acid in callus cultures of Ocimum sanctum

Induction of rosmarinic acid in callus cultures of Ocimum sanctum

Diacylglycerol acyltransferase 2 promotes the adipogenesis of intramuscular preadipocytes in goat

Diacylglycerol acyltransferase 2 (DGAT2) is the key enzyme that catalyzes the last step of triglyceride synthesis. However, its role in intramuscular fat (IMF) deposition in goat remains unclear. The purpose of this study was to explore the role of DGAT2 in regulating goat IMF deposition. In the present study, the expression of DGAT2 was highest in goat triceps brachii, and highest on the first day after oleic acid induction in goat intramuscular preadipocytes. The overexpression of DGAT2 promoted the accumulation of lipid droplets and triglyceride synthesis, accompanied by the expression upregulation of DGAT1, TIP47, ACC and ACOX1 significantly, and expression downregulation of AGPAT6, LPIN1, LPL, HSL, ATGL and ADRP significantly. In contrast, the silencing of DGAT2 decreased the accumulation of lipid droplets, inhibited the expression of DGAT1, GPAM, ADRP, AGPAT6, LPL, HSL, ATGL, ACC, FASN, ACOX1 significantly, and enhanced that of TIP47 significantly. Overall, these data underscore DGAT2 may play a potentially important role in lipid droplets formation and triglyceride accumulation, so as to maintain intramuscular fat deposition, beyond triglyceride synthesis in goat.

The Indole-3-Acetamide-Induced Arabidopsis Transcription Factor MYB74 Decreases Plant Growth and Contributes to the Control of Osmotic Stress Responses.

The accumulation of the auxin precursor indole-3-acetamide (IAM) in the ami1 mutant has recently been reported to reduce plant growth and to trigger abiotic stress responses in Arabidopsis thaliana. The observed response includes the induction of abscisic acid (ABA) biosynthesis through the promotion of NCED3 expression. The mechanism by which plant growth is limited, however, remained largely unclear. Here, we investigated the transcriptional responses evoked by the exogenous application of IAM using comprehensive RNA-sequencing (RNA-seq) and reverse genetics approaches. The RNA-seq results highlighted the induction of a small number of genes, including the R2R3 MYB transcription factor genes MYB74 and MYB102. The two MYB factors are known to respond to various stress cues and to ABA. Consistent with a role as negative plant growth regulator, conditional MYB74 overexpressor lines showed a considerable growth reduction. RNA-seq analysis of MYB74 mutants indicated an association of MYB74 with responses to osmotic stress, water deprivation, and seed development, which further linked MYB74 with the observed ami1 osmotic stress and seed phenotype. Collectively, our findings point toward a role for MYB74 in plant growth control and in responses to abiotic stress stimuli.

Cross-protection of oilseed rape against Verticillium longisporum by the non-aggressive lineage A1/D2

Verticillium longisporum is a soil-borne vascular pathogen of oilseed rape and other Brassica crops. The limited availability of chemical control measures against vascular pathogens calls for the exploration of control alternatives. Cross-protection may be conveyed by the use of non-pathogenic or non-aggressive isolates of potential pathogens as biocontrol agents. V. longisporum consists of three lineages that originated from three independent hybridization events of four haploid Verticillium parents. Previous pathogenicity tests in the greenhouse have shown that lineage A1/D2 is non-pathogenic or non-aggressive on different Brassica and non-Brassica hosts. Thus, the cross-protection potential of the A1/D2 lineage against an aggressive V. longisporum isolate in oilseed rape was tested. With root-dip inoculation, A1/D2 reduced disease symptoms when applied before or at the same time as the aggressive isolate. The induction of salicylic acid, a signal known to play a role in basal and cultivar-related resistance, was not involved in the biocontrol mechanism. The most practical and best feasible method of application as a seed coat failed to confirm the biocontrol effect of A1/D2 observed with root-dip inoculation. Confocal microscopy analysis revealed that seed coating led to insufficient A1/D2 hyphal establishment on the roots compared to root-dip inoculation, which may explain the lack of a biocontrol effect after seed coating and illustrates the importance of the application method for efficacy of a cross-protective biocontrol agent.

Exposure to Polybrominated Diphenyl Ether Flame Retardants Causes Deoxyribonucleic Acid Damage in Human Thyroid Cells In Vitro

IntroductionThe incidence of papillary thyroid cancer (PTC) in the United States has tripled in the past 30 y. Polybrominated diphenyl ethers (PBDEs) are flame retardants that were ubiquitously used over that time period, and exposure to PBDEs has been associated with PTC prevalence. They are potential carcinogens via their induction of reactive oxygen species (ROS) formation and resultant deoxyribonucleic acid (DNA) damage. We sought to determine the effects of PBDE and tris(2-chloroethyl) phosphate (TCEP), another flame retardant implicated in PTC incidence, on thyrocytes in vitro and measure PBDE levels in human thyroid tissue to determine their carcinogenic potential. MethodsNthy-Ori, an immortalized benign human thyroid follicular cell line was used as a model of normal human thyroid. MTT assays were used to measure cell viability after exposure to PBDEs and TCEP. ROS levels and double-stranded and single-stranded DNA breaks were measured to determine genotoxicity. DNA damage response protein levels were measured with immunoblotting. ResultsExposure to 20μM PBDE or TCEP for 48 h had minimal effects on thyrocyte viability. There was no significant increase in intracellular ROS up to 6 h following PBDE or TCEP exposure in thyrocytes; however, cells exposed to PBDE 47 showed evidence of DNA single-stranded and double-stranded breaks. There was a dose-dependent increase in γH2AX levels following exposure to PBDEs 47 and 209 in Nthy-Ori cells but not with TCEP treatment. ConclusionsPBDE 47 and 209 demonstrated genotoxicity but not cytotoxicity in follicular thyrocytes in vitro. Therefore, PBDE 47 and 209 may be carcinogenic in human thyroid cells.

Salicylic Acid and Phytoalexin Induction by a Bacterium that Causes Halo Blight in Beans.

Pseudomonas savastanoi pv. phaseolicola is a bacterium that causes halo blight in beans. Different varieties of beans have hypersensitive resistance to specific races of P. savastanoi pv. phaseolicola. During hypersensitive resistance, also known as effector-triggered immunity (ETI), beans produce hormones that signal molecular processes to produce phytoalexins that are presumed to be antibiotic to bacteria. To shed light on hormone and phytoalexin production during immunity, we inoculated beans with virulent and avirulent races of P. savastanoi pv. phaseolicola. We then used mass spectrometry to measure the accumulation of salicylic acid (SA), the primary hormone that controls immunity in plants, and other hormones including jasmonate, methyljasmonate, indole-3-acetic acid, abscisic acid, cytokinin, gibberellic acid, and 1-aminocyclopropane-1-carboxylic acid. SA, but no other examined hormone, consistently increased at sites of infection to greater levels in resistant beans compared with susceptible beans at 4 days after inoculation. We then monitored 10 candidate bean phytoalexins. Daidzein, genistein, kievitone, phaseollin, phaseollidin, coumestrol, and resveratrol substantially increased alongside SA in resistant beans but not in susceptible beans. In vitro culture assays revealed that SA, daidzein, genistein, coumestrol, and resveratrol inhibited P. savastanoi pv. phaseolicola race 5 culture growth. These results demonstrate that these phytoalexins may be regulated by SA and work with SA during ETI to restrict bacterial replication. This is the first report of antibiotic activity for daidzein, genistein, and resveratrol to P. savastanoi pv. phaseolicola. These results improve our understanding of the mechanistic output of ETI toward this bacterial pathogen of beans.

Anti-Inflammatory and Analgesic Activity of Musa balbisiana Peels In Vivo

Musa balbisiana Peels (MBP) contains high levels of flavonoids, alkaloids, tannins, saponins, and triterpenoids. Flavonoids function to slow down the inflammatory process by inhibiting the arachidonic acid, forming prostaglandins, and releasing histamine. This study aimed to examine the anti-inflammatory and analgesic effects of MBP decoction. This study used the Winter method for anti-inflammatory assay by induction of carrageenan on the soles of rat's feet and Sigmund's method for analgesic assay with intraperitoneal induction of acetic acid in mice. Group I as a negative control, group II as a positive control with diclofenac sodium, group III as a low dose (200 mg/kg BW of MBP), group IV as a medium dose (400 mg/kg BW of MBP), and group V as a high dose (800 mg/kg BW of MBP decoction). The percentage of inhibition in the anti-inflammatory test in rats for groups II, III, IV, and V was 34.43%, 17.68%, 25.53%, and 25.4%, and the percentage of effectiveness for the anti-inflammatory test, respectively, was 51.35%, 74.15%, and 74.01%. The results of the percentage inhibition of the analgesic test in mice for groups II, III, IV, and V were 55.25%, 38.52%, 44.53%, and 49.31%, and the percentage of effectiveness for the analgesic test, respectively, followed by 69.71%, 80.59%, and 89.24%. Based on the results, it can be concluded that the decoction of the MBP has an anti-inflammatory and analgesic effect.

The associative induction of succinic acid and hydrogen sulfide for high-producing biomass, astaxanthin and lipids in Haematococcus pluvialis

To obtain higher yield of natural astaxanthin, the present study aims to develop a viable and economic induction strategy for astaxanthin production comprising succinic acid (SA) combined with sodium hydrosulfide (NaHS). The biomass (1.33 g L-1), astaxanthin concentration (44.96 mg L-1), astaxanthin content (163.55 pg cell−1), and lipid content (55.34%) were achieved under 1.0 mM SA and 100 μM NaHS treatment. These results were concomitant with enhanced hydrogen sulfide (H2S) but diminished reactive oxide species (ROS). Further study discovered that endogenous H2S could improve astaxanthin and lipid coproduction under SA induction by mediating related gene transcript levels and ROS signalling. Additionally, the concentrations of biomass and astaxanthin increased to 2.14 g L-1 and 66.25 mg L-1, respectively, under the induction of SA and NaHS in a scaled-up bioreactor. Briefly, the work proposed a novel feasible strategy for high yields of biomass and astaxanthin by H. pluvialis.

Endoplasmic reticulum stress contributed to inflammatory bowel disease by activating p38 MAPK pathway.

Recent evidence suggests that endoplasmic reticulum (ER) stress plays a vital role in inflammatory bowel disease (IBD). Therefore, the aim of this study was to investigate the mechanism by which ER stress promotes inflammatory response in IBD. The expression of Gro-α, IL-8 and ER stress indicator Grp78 in colon tissues from patients with Crohn’s disease (CD) and colonic carcinoma was analyzed by immunohistochemistry staining. Colitis mouse model was established by the induction of trinitrobenzene sulphonic acid (TNBS), and the mice were treated with ER stress inhibitor tauroursodeoxycholic acid (TUDCA). Then the body weight, colon length and colon inflammation were evaluated, and Grp78 and Gro-α in colon tissues were detected by immunohistochemistry. Epithelial cells of colon cancer HCT116 cells were treated with tunicamycin to induce ER stress. Grp78 was detected by Western blot, and chemokines were measured by PCR and ELISA. The expression levels of Grp78, Gro-α and IL-8 were significantly upregulated in intestinal tissues of CD patients. Mice with TNBS induced colitis had increased expression of Grp78 and Gro-α in colonic epithelia. TUDCA reduced the severity of TNBS-induced colitis. In HCT116 cells, tunicamycin increased the expression of Grp78, Gro-α and IL-8 in a concentration-dependent manner. Furthermore, p38 MAPK inhibitor significantly inhibited the upregulation of Gro-α and IL-8 induced by tunicamycin. In conclusion, ER stress promotes inflammatory response in IBD, and the effects may be mediated by the activation of p38 MAPK signaling pathway.

Fatty acids profile, antioxidant properties, phytosterols, induction period, and sensory characteristics of olein and super olein fractions of date seed oil

Date seed oil was cooled to −20°C, filtered to produce olein fraction (OF, yield 38%), olein was further cooled to −30°C to produce super olein fraction (SOF, yield 22%), kept in amber glass bottles at 25–30°C for 90 days. HPLC analysis showed that phenolic compounds were intensified in olein and super olein of date seed oil. In SOF, concentrations of chromatographic acid, quercetin, gallic acid, caffeic acid, chlorogenic acid, syringic acid, p-coumeric acid, m-coumeric acid, and ferulic acid were 26.11 mg/100 g, 245.61 mg/100 g, 23.72 mg/100 g, 115.19 mg/100 g, 133.42 mg/100 g, 18.74 mg/100 g, 83.25 mg/100 g, 53.47 mg/100 g, and 49.97 mg/100 g. The concentrations of C18:1 in date seed oil, olein, and super olein were 43.64%, 48.91%, and 55.37%, respectively. Total phenolic contents of date seed oil, olein, and super olein were 191, 295, and 343 mg GAE/100 g. At the end of storage, the peroxide value of date seed oil, olein, and super olein was 0.55, 0.71, and 0.85 (MeqO2/kg) with no difference in color, smell, and taste. Practical applications Increased information on nutrition- and health-associated disorders has a great influence on the development of functional foods. Unsaturated fatty acids, carotenoids, phytochemicals, and other bioactive compounds contained in vegetable oils have a large number of health benefits. Traditionally used vegetable oils are subjected to refining, bleaching, and deodorization to produce bland oils that lead to a complete elimination of almost all bioactive compounds. Date seed oil can be used in raw forms, and olein and super olein fractions of date seed oil were first time produced. Olein and super olein fractions had a higher concentration of unsaturated fatty acids, phenolic compounds than date seed oil with no difference in sensory characteristics. Olein and super olein fractions can be used in the development of the large number of functional foods.

Senescence modulation as a key process in the dual role of hyaluronan in cancer: the deforestation allegory.

Cancer is one of the leading causes of death worldwide and has been associated with ageing. Although there are numerous reports that have demonstrated the dual role of hyaluronic acid and senescence induction in cancer prevention and promotion, both players have been linked to ageing in opposite ways. Hyaluronan is recognized for its antiaging role, whereas senescence is associated with ageing. In this review we address these dual roles, showing their interrelation, hypothesizing that the downregulation of senescence mediated by HA would be a key factor in the ambivalent effects described. Likewise, the deforestation allegory aims to explain, through the use of a metaphor, the contradictory yet valid results found in the literature. Considering this background, we propose new strategies for improving tumor therapy. Understanding the biology of these complex diseases and the temporal implication of the different players in dissimilar contexts could bring us closer to the therapeutic improvements needed in the field of oncology.

Rheological and functional characterization of gelatin and fat extracted from chicken skin for application in food technology.

Chicken skin is a major byproduct of the poultry industry. This study was undertaken to extract and characterize fat and gelatin from chicken skin. To do this, the chicken skin was wet‐rendered at different temperature–time combinations and the yield and properties of the extracted gelatin and fat were determined. Gelatin and fat were recovered at yield ranges of 0.74%–2.03% and 24.01%–27.91%, respectively. The time and the interaction of time–temperature had a positive effect on gelatin yield (p < .05); however, the fat yield was not affected by the extraction condition. Protein, ash, and hydroxyproline content of gelatin and unsaponifiables and free fatty acids contents, peroxide value, and induction period of oxidation of the fat were affected by the extraction condition. Functional and rheological analyses showed chicken skin gelatin gel/solution had a higher bloom value, viscosity, foaming capacity, storage and loss moduli, and melting and gelling points than the commercial bovine gelatin. Oleic (42.13%), palmitic (24.6%), and linoleic (17.53%) acids were the main fatty acids of chicken skin fat. The storage modulus of chicken skin fat was higher than the loss modulus up to 31°C; however, because of a low slip melting point (22.74°C) and solid fat content, it was fluid at room temperature. The findings of this research can be useful in the development of processes for the extraction and application of chicken skin gelatin and fat.