fluoride/zea mays

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Comparison of fluoride effects on germination and growth of Zea mays, Glycine max and Sorghum vulgare.

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BACKGROUND Fluorosis is a disease caused by over-exposure to fluoride (F). Argentina's rural lands have higher fluorine content than urban lands. Evidence confirms that plants grown in fluoridated areas could have higher F content. We compared F uptake and growth of crops grown in different F

Atmospheric Fluoride: Its Uptake and Distribution in Tomato and Corn Plants.

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Leaf Proteolytic Activities and Senescence during Grain Development of Field-grown Corn (Zea mays L.).

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Some proteolytic enzymes occurring in the leaves of field-grown corn (Zea mays) (B73) were identified and partially characterized. Changes in activities of several proteolytic enzymes and in concentrations of protein and chlorophyll as a function of intraleaf segments (tip to base), leaf position,

Fluoride uptake and translocation in food crops grown in fluoride-rich soils

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Background: The East African Rift Valley (EARV) area is characterized by an intense volcanic activity, which largely influences the nature of soils, ground and surface waters causing a transfer of fluoride from volcanic emissions to the

Efficacy of lycopene against fluoride toxicity in rats.

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BACKGROUND Oxidative damage to cellular components such as lipids and cell membranes by free radicals and reactive oxygen species (ROS) is thought to be associated with the development of degenerative diseases. Fluoride intoxication is associated with oxidative stress and altered anti-oxidant

Development of Endopeptidase Activities in Maize (Zea mays L.) Endosperms.

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An activity stain was used after native polyacrylamide gel electrophoresis, and at least 17 different endopeptidase activities were detected in maize (Zea mays L.) endosperm extracts prepared during the first 6 d after imbibition. The enzymes detected were classified into four groups based on their

Structure of the Threonine-Rich Extensin from Zea mays.

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Chymotryptic digestion of a threonine-rich hydroxyproline-rich glycoprotein (THRGP) purified from the cell surface of a Zea mays cell suspension culture gave a peptide map dominated by the hexadecapeptide TC5: Thr-Hyp-Ser-Hyp-Lys-Pro-Hyp-Thr-Pro-Lys-Pro-Thr-Hyp-Hyp-Thr-Tyr, in which the repetitive

A Histidine-Rich Extensin from Zea mays Is an Arabinogalactan Protein.

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Earlier we isolated a threonine-rich extensin from maize (Zea mays). Here, we report that maize cell suspension cultures yield a new extensin rich in histidine (HHRGP) that also has characteristics of arabinogalactan proteins (AGPs). Thus, chymotryptic peptide maps of anhydrous hydrogen fluoride

The epidemic of obesity and changes in food intake: the Fluoride Hypothesis.

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The epidemic of obesity is worldwide. It will be followed by an epidemic of diabetes. Although there is a genetic basis for obesity and diabetes, the current epidemic reflects the failure of our ancient genes to cope with a modern toxic environment. To put it another way, the genetic background

Pulmonary apoptotic and oxidative damaging effects of Triclosan alone or in combination with Fluoride in Sprague Dawley rats.

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This study aimed to assess the potential apoptotic and oxidative damaging impacts of Triclosan (TCS) and Sodium Fluoride (NaF) administered separately or in combination, in rats for thirty days. For this purpose, forty immature female Sprague-Dawley rats were equally allocated into five groups. TCS

Inhibition of phosphate uptake in corn roots by aluminum-fluoride complexes.

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F forms stable complexes with Al at conditions found in the soil. Fluoroaluminate complexes (AlF(x)) have been widely described as effective analogs of inorganic phosphate (Pi) in Pi-binding sites of several proteins. In this work, we explored the possibility that the phytotoxicity of AlF(x)

Joint action of ozone and hydrogen fluoride on foliar senescence in maize.

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Maize (Zea mays, L.) plants were exposed intermittently to O(3), HF or both pollutants and the progression of foliar senescence was followed by measuring chlorophyll loss, membrane breakdown and changes in stomatal conductance. At concentrations insufficient to cause foliar symptoms (0.06 microl

Arylsulphatase activity of corn (Zea mays L.) seedling roots.

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The crude lysosomal fraction of corn seedling root tips contains an arylsulphatase (E.C. 3.1.6.1) which hydrolysed p-nitrophenyl sulphate at pH 8.0 but had no activity towards p-nitrocatechol sulphate. The Km value for p-nitrophenyl sulphate was 1.24 mM. The hydrolysis of p-nitrophenyl sulphate was

Potentiation of organophosphorus compound-induced delayed neurotoxicity (OPIDN) in the central and peripheral nervous system of the adult hen: distribution of axonal lesions.

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Clinical manifestations of mild organophosphorus compound-induced delayed neurotoxicity (OPIDN) produced by diisopropylphosphorofluoridate (DFP) in adult hens are potentiated by posttreatment with phenylmethanesulfonyl fluoride (PMSF). The purpose of this study was to assess whether potentiation of

A gymnosperm extensin contains the serine-tetrahydroxyproline motif.

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The extensin family is a diverse group of hydroxyproline-rich glycoproteins located in the cell wall and characterized by repetitive peptide motifs glycosylated to various degrees. The origin of this diversity and its relationship to function led us earlier to compare extensins of the two major

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