reductase/zea mays

Zea mays (cv W64A x W182E) was used to investigate the induction and turnover of nitrate reductase (NR). In our system, 5 or 10 mM KNO3 gave the best growth over a 6-d growing period. With these NO3- levels, NR reached steady-state levels after 24 h. For the turnover experiments, the seedlings were

Experiments were conducted to determine whether the nitrate flux to the leaves or the nitrate content of the leaves regulated the nitrate reductase activity (NRA) in leaves of intact maize (Zea mays L.) seedlings having low water potentials (psi(w)) when other environmental and endogenous factors

Prior analyses established that the maize (Zea mays L.) gl8a gene encodes 3-ketoacyl reductase, a component of the fatty acid elongase required for the biosynthesis of very long chain fatty acids (VLCFAs). A paralogous gene, gl8b, has been identified that is 96% identical to gl8a. The gl8a and gl8b

The distribution of the Mo-enzymes aldehyde oxidase (AO; EC 1.2.3.1) xanthine dehydrogenase (XDH; EC 1.2.1.37) and nitrate reductase (NAD(P)H NR; EC 1.6.6.1-2) was studied along the longitudinal and transversal axes of maize (Zea mays L. cv. Jubily) nodal roots as affected by nitrogen sources and

Both light and NO3- are necessary for the appearance of nitrate reductase (NR) activity (NRA) in photosynthetic tissues. To define the light effect more precisely, we examined the response to light/dark transitions on NRA, NR protein (NRP), and NR mRNA in 6-d-old maize (Zea mays cv W64A x W182E)

Tungsten is a widely used inhibitor of nitrate reductase, applied to diminish the nitric oxide levels in plants. It was recently shown that tungsten also has heavy metal attributes. Since information about the toxic effects of tungsten on actin is limited, and considering that actin microfilaments

Nitrite reductase from green leaves of corn (Zea mays L.) is eluted from a diethylaminoethyl-cellulose column in one peak of activity by a chloride gradient, while nitrite reductase from scutellum tissue is resolved into two peaks of activity, apparently representing two forms of the enzyme NiR1 and

The roles that leaf nitrate content and nitrate flux play in regulating the levels of nitrate reductase activity (NRA) were investigated in 8- to 14-day old maize (Zea mays L.) plants containing high nitrate levels while other environmental and endogenous factors were constant. The nitrate flux of

Some genes involved in anthocyanin biosynthesis in Zea mays are duplicated and differentially expressed. From the analysis of the A1 gene (dihydroflavonol 4-reductase), which is involved in this pathway, no molecular evidence for gene duplication was known to date. Isolation and analysis of A1

A genomic clone encoding ferredoxin-NADP reductase binding protein (BP) from Zea mays L. was sequenced and characterized. The promoter region (692 bp) shows several motives resembling those involved in enhancement, tissue-specific expression and light regulation in plants, besides the typical TATA

The 12-oxo-phytodienoic acid reductases (OPRs) are enzymes that catalyze the reduction of double bonds adjacent to an oxo group in alpha,beta-unsaturated aldehydes or ketones. Some of them have very high substrate specificity and are part of the octadecanoid pathway which convert linolenic acid to

Aldose reductase (AR) inhibitors have a considerable therapeutic potential against diabetes complications and do not increase the risk of hypoglycemia. Through bioassay-guided fractionation of an EtOH extract of the kernel from purple corn (Zea mays L.), 7 nonanthocyanin phenolic compounds (compound

The induction of jasmonic acid (JA) is one of the major signaling events in plants in response to insect herbivore damage and leads to the activation of direct and indirect defensive measures. Green leafy volatiles, which constitute a major portion of volatile organic compounds, often are released

We determined the complete nucleotide sequence of a cDNA clone encoding the smaller, catalytic subunit of ferredoxin-thioredoxin reductase from corn chloroplasts. The translated protein sequence, representing a subunit of 12.9 kDa shows 80% identity with the protein sequence from spinach and

Four maize hybrids, two with high and two with low levels of postanthesis nitrate reductase activity were grown under field conditions. The characteristic enzyme patterns had been established in previous work. Nitrate reductase and proteases were measured in three representative leaves (ear leaf,