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This study aimed to examine the effects of UV-B on AsA and gene expression in cucumber seedlings. Particular emphasis was placed on identifying genes that were responsive to UV-B to increase AsA levels and elucidate the key UV-B response pathway. We found that the activities of myo-inositol oxygenase (MIOX), galactono-1,4-lactone dehydrogenase (GLDH), ascorbate oxidase (AO), ascorbate peroxidase (APX), glutathione reductase (GR), dehydroascorbate reductase (DHAR), and the transcript levels of CsMIOX1, CsGLDH, CsAO2, CsAO4, CsGR1, CsAPX5, CsDHAR1 significantly increased with UV-B exposure. These observations indicate that UV-B induces the expression of genes involved in D-mannose/L-galactose, myo-inositol pathway and the ascorbate-glutathione system. Moreover, several genes related to the low and high UV-B fluence responses were considered. CsHY5 and CsMYB60 were involved with the low fluence response and appeared to be responsive from 2 h to 28 h. Together, these data show that these genes respond to UV-B to increase AsA levels through the low fluence UV-B response pathway.
This article was published in the following journal.
Name: Journal of agricultural and food chemistry
l-Gulonate dehydrogenase (GuDH) is a crucial enzyme in the non-phosphorylated sugar metabolism or glucuronate-xylulose (GX) pathway. Some naturally occurring compounds inhibit GuDH. Ascorbic acid is o...
The use of recycled water for agricultural irrigation comes with the concern of exposure to crops by contaminants of emerging concerns (CECs). The concentration of CECs in plant tissues will depend on...
Traditionally, methylglyoxal (MG) was looked upon as a toxic byproduct of cellular metabolism. Nowadays, MG has been found to be a novel signaling molecule. However, whether MG can trigger the heat to...
A simple strategy for modulating the fluorescence of MoS quantum dots (QDs) is described. The fluorescence of MoS QDs was firstly switched off by the addition of Cr(VI), and the quenched fluorescence ...
This paper investigates the physiological mechanism of the effect of delaying cucumber senescence on protein levels under the experimental model of monoculture and wheat intercropping. We analyzed cuc...
To investigate the effect of ascorbic acid on angiographic restenosis after percutaneous transluminal angioplasty (PTA) for dysfunctional dialysis vascular access.
A Randomized controlled trial aiming to investigate whether ascorbic acid has a role in preventing vancomycin induced nephrotoxicity or not in critically ill patients.
Nicotinamide nucleotide transhydrogenase (NNT) mutations cause glucocorticoid and mineralocorticoid deficiencies through decreased detoxification of reactive oxygen species (ROS) in adreno...
Charcot-Marie-Tooth type IA (CMT1A) is the most prevalent hereditary peripheral neuropathy. Demyelination of peripheral nerves is the hallmark of CMT1A. Ascorbic acid has been shown to hav...
This is a prospective pilot study in which the effects of ascorbic acid administration are investigated in adult patients undergoing cardiac surgical procedures requiring cardiopulmonary b...
A strong dicarboxylic acid occurring in many plants and vegetables. It is produced in the body by metabolism of glyoxylic acid or ascorbic acid. It is not metabolized but excreted in the urine. It is used as an analytical reagent and general reducing agent.
A condition due to a dietary deficiency of ascorbic acid (vitamin C), characterized by malaise, lethargy, and weakness. As the disease progresses, joints, muscles, and subcutaneous tissues may become the sites of hemorrhage. Ascorbic acid deficiency frequently develops into SCURVY in young children fed unsupplemented cow's milk exclusively during their first year. It develops also commonly in chronic alcoholism. (Cecil Textbook of Medicine, 19th ed, p1177)
An enzyme involved in the metabolism of ASCORBIC ACID and aldarate. It catalyzes the oxidation of L-gulono-1,4-lactone to L-xylo-hex-3-ulonolactone.
A six carbon compound related to glucose. It is found naturally in citrus fruits and many vegetables. Ascorbic acid is an essential nutrient in human diets, and necessary to maintain connective tissue and bone. Its biologically active form, vitamin C, functions as a reducing agent and coenzyme in several metabolic pathways. Vitamin C is considered an antioxidant.
Metabolite of ASCORBIC ACID and the oxidized form of the lactone DEHYDROASCORBIC ACID.
Within medicine, nutrition (the study of food and the effect of its components on the body) has many different roles. Appropriate nutrition can help prevent certain diseases, or treat others. In critically ill patients, artificial feeding by tubes need t...
The process of gene expression is used by eukaryotes, prokaryotes, and viruses to generate the macromolecular machinery for life. Steps in the gene expression process may be modulated, including the transcription, RNA splicing, translation, and post-tran...