![]() It has been found that the HCN-producing rhizobacteria are typically host specific and show no adverse effect on the host plant, allowing their use as excellent biological weed control agents ( Zeller et al., 2007).Īmmonia production is a quite common trait observed in many microorganisms and one that can modulate plant growth and development in an indirect manner. ![]() At the molecular level, HCN inhibits the action of cytochrome oxidase, thus inhibiting the electron transport chain and in turn inhibiting the energy supply to cells. This toxic compound is produced by microbes as a secondary metabolite and utilizes it as a survival strategy against other macro and microorganisms by conferring a selective advantage to the producer strain. ( Ahmad et al., 2008), which helps to control the growth of weeds that colonize on the plant root surfaces and suppress plant growth ( Suslow et al., 1979). HCN is a toxic compound synthesized by some microorganisms, specially Bacillus and Pseudomonas sp. ![]() Abhrajyoti Ghosh, in Agrochemicals Detection, Treatment and Remediation, 2020 11.3.2.4 Hydrogen cyanide and ammonia ![]() The box model suggests a deposition to the global ocean of 1.3 Tg N yr −1 HCN and CH 3CN, which is ∼4% of the total yearly amount of nitrogen entering the oceans via atmospheric deposition (mainly in the form of nitrate and ammonium in rain and particles).Ĭhandrima Bhattacharyya. Since there are no measurements of HCN or CH 3CN in seawater, it is currently not possible to verify these undersaturations, nor is anything known about the destruction processes for the gases in seawater. These authors have used a simple box model to try to quantify the uptake and deduced that ocean surface waters have to be ∼20% undersaturated to achieve balance. Concentration measurements over the oceans show lower amounts in the marine boundary layer, and this has been attributed to uptake by the oceans ( Singh et al., in press). Their main source is biomass burning, with smaller contributions from automobiles and industry. Hydrogen cyanide (HCN) and methyl cyanide (CH 3CN) are trace gases in the atmosphere occurring at the 100–200 pptv level. Liss, in Treatise on Geochemistry, 2003 6.03.3.4.3 Hydrogen cyanide and methyl cyanide
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