Phosphite dehydrogenase (PTDH) from Pseudomonas stutzeri catalyzes the nicotinamide adenine dinucleotide-dependent oxidation of phosphite to phosphate. The enzyme belongs to the family of D-hydroxy acid dehydrogenases (DHDHs). A search of the protein databases uncovered many additional putative phosphite dehydrogenases. The genes encoding four diverse candidates were cloned and expressed, and t...

Phosphite dehydrogenase (PTDH) catalyzes the NAD(+)-dependent oxidation of phosphite to phosphate. This reaction requires the deprotonation of a water nucleophile for attack on phosphite. A crystal structure was recently solved that identified Arg301 as a potential base given its proximity and orientation to the substrates and a water molecule within the active site. Mutants of this residue sho...

In the soil there exist cycles of biological oxidation and reduction for inorganic compounds of sulfur and nitrogen. We have been interested in the possibility that a similar cycle might exist for inorganic compounds of phosphorus. In particular, we have been interested in one step of such a cycle, that of biological oxidation of orthophosphite to orthophosphate. There are few reports in the li...

The mol-ecule of the title compound, C(22)H(42)Si(2), lies on a center of inversion, and the triisopropyl-silyl groups are staggered.

To date the majority of work on the systemic fungicide phosphite (phosphonate) to control Phytophthora diseases has been conducted on horticultural crops. There is a paucity of work on the control of Phytophthora root and collar rots in natural plant communities. This paper gives an overview of studies conducted in Western Australia which examine the potential of using phosphite in plant commun...

Plant growth promoting rhizobacteria (PGPR) are potential agents to control plant pathogens and their combined use with biopesticides such as phosphites may constitute a novel strategy to incorporate in disease management programs. In the present study, 11 bacterial isolates were selected on the basis of their antagonistic activity against Macrophomina phaseolina in dual-culture tests, and thei...

A highly efficient, two-step sequence method for the deoxygenation of hydroxyl groups has been developed. The method involves the preparation of the 2-(2-iodophenyl)ethyl methyl phosphite derivative of an alcohol using methyl dichlorophosphite and 2-(2-iodophenyl)ethanol. Treatment of the phosphite intermediate with (n-Bu)3SnH/AIBN in refluxing benzene cleanly produces the deoxygenation product...

Abstract The objective of the present study was to determine best phosphite source and concentration control anthracnose its effects on physical chemical characteristics ‘Prata-anã’ banana. Bouquets banana fruits were immersed in solutions containing different formulations copper FCu1 (4% Cu + 20% P2O5), FCu2 22% P2O5) at concentrations 0.5; 1.0, 1.5- 2.0-mL L-1 potassium FK (42% P2O5 27.7% K2O...

Changes in plant metabolism due to water deficit combined with other stresses, such as high irradiance and temperatures, cause damage the physiology development of crops, which can lead significant yield losses. The aim this study was determine potential potassium phosphite (PP) induce tolerance soybean plants. experiment carried out an acclimatized growth chamber. Soybean plants, upon reaching...

A simple and efficient one pot synthesis of 2-amino-4H-chromen-4-yl phosphonate derivatives has been accomplished by the condensation of salicylaldehyde, malononitrile/ethylcyanoacetate and triethyl phosphite/trimethyl phosphite in the presence of molecular iodine as catalyst in water at room temperature. All the reactions were very clean and the products were obtained in very good to excellent...