The ability of soil-borne fungi to degrade organophosphonate carbon-to-phosphorus bonds

Abstract

The ability of a wide variety of soil-borne fungal strains to degrade four structurally different compounds containing P-C bonds, namely the naturally occurring amino acid ciliatine, the popular herbicide glyphosate, phosphonoacetic acid and 2-amino-3-phosphonopropionic acid, was studied in order to show that soil fungi may play an important role in the biodegradation of organophosphonates. Most of the strains appeared to utilize ciliatine as the sole source of phosphorus for growth. Only a limited number of strains were able to grow on the other phosphonates used in this work. The strains of Trichoderma harzianum, Scopulariopsis sp. and Aspergillus niger chosen for more detailed study show the ability to degrade ciliatine, glyphosate and also amino(3-methoxyphenyl)methylphosphonic acid effectively.

The Potential use ofTrichoderma VirideStrain FRP3 in Biodegradation of the Herbicide Glyphosate

“…the same medium was used but without K 2 hPo 4 to serve as the control (medium in the absence of phosphate). thus, when glyphosate was used as the sole source of phosphorus, K 2 hPo 4 was replaced by glyphosate at a final concentration of 10 mmol/L (14). All glassware was washed with 1 mol/l hcl and rinsed with deionized water to remove contaminating phosphate before use and then glyphosate was added after medium sterilization.…”

Organophosphonate Utilization by the Thermophile Geobacillus caldoxylosilyticus T20

“…Few attempts have been made to investigate the biodiversity of microorganisms capable of degrading organophosphonates (26), and studies have concentrated mainly on gram-negative, mesophilic bacteria, although recent work has attempted to redress this imbalance (9,14,19). While the isolation, biochemical characterization, and taxonomic description of thermophilic microbial strains have proceeded apace in recent years (18), biodegradation studies with such microorganisms are relatively scarce, and studies with organophosphonates are nonexistent.…”

The Effect of the Application of Different Rates of Herbicides on the Growth and Yield Component of Zea mays L

“…The germination count, mean height of the maize 4WAP, number and weight of cobs harvested from the treated plots were 35, 288.8 plants/hectare, 75.19cm, 26, 666.8 cobs /hectare and 3, 682.8g respectively in the first phase of the study, which are higher than the 28,600.4 plants/hectare, 59.5cm, 15, 916.8 cobs/hectare and 1, 985.2g recorded in the second phase. This can be attributed to the lingering effects of the herbicides in the experimental plots (Myers et al, 2016), and the physiochemical changes caused to the soil by the use of the herbicides (Ayansina and Oso, 2006;Liu et al, 1991;Sprankle, et al 1975;Krzysko-Lupicka et al, 1997). Studies conducted by Myers et al (2016) showed that herbicides persist in the soil longer than previously reported, and so the effects of the herbicides applied during the first phase of the study can easily extend to the second phase of the study.…”