title: Toxicological assessment of selective pesticides towards plant growth promoting activities of phosphate solubilizing Pseudomonas aeruginosa.
abstract: The study was designed to assess the effect of selected pesticides (metribuzin, glyphosate, imidacloprid, thiamethoxam, hexaconazole, metalaxyl and kitazin) at the recommended and higher rates on plant growth promoting activities of Pseudomonas aeruginosa strain PS1 isolated from mustard (Brassica compestris) rhizosphere. The strain PS1 was specifically chosen owing to its substantial tolerance against pesticides, phosphate solubilization and considerable production of indole acetic acid, siderophores, exo-polysaccharides, HCN and ammonia. Plant growth promoting traits of the strain PS1 decreased consistently as the concentrations of each pesticide was increased from the recommended dose to the higher ones. Generally, the maximum toxicity to plant growth promoting traits was displayed by pesticides at three times the recommended field rate. However, the effect on the plant growth promoting activities of the P. aeruginosa strain PS1 at the recommended dose of each pesticide was less hazardous. This study revealed an additional aspect of the toxicological mechanisms of the pesticides through which they suppress the plant growth.
authors: Aligarh Muslim University, Department of Agricultural Microbiology, Faculty of Agricultural Sciences, Aligarh 202002 U.P. India. muneesmicro@rediffmail.com
authors: Munees
authors: M
authors: Ahemad
authors: Mohammad Saghir
authors: MS
authors: Khan
mesh_terms: D001937:Brassica / Q000254:growth & development / Q000382:microbiology*; D004305:Dose-Response Relationship, Drug; D006540:Herbicides / Q000633:toxicity; D007093:Imidazoles / Q000633:toxicity; D000073943:Neonicotinoids; D009574:Nitro Compounds / Q000633:toxicity; D010078:Oxazines / Q000633:toxicity; D010575:Pesticides / Q000032:analysis / Q000633:toxicity*; D010710:Phosphates / Q000378:metabolism; D011550:Pseudomonas aeruginosa / Q000187:drug effects*; D012329:RNA, Bacterial / Q000235:genetics; D012336:RNA, Ribosomal, 16S / Q000235:genetics; D012231:Rhizobium / Q000187:drug effects* / Q000378:metabolism; D058441:Rhizosphere; D017422:Sequence Analysis, DNA; D017262:Siderophores / Q000378:metabolism; D012988:Soil Microbiology; D012989:Soil Pollutants / Q000633:toxicity*; D000077922:Thiamethoxam; D013844:Thiazoles / Q000633:toxicity; D014227:Triazines / Q000633:toxicity; D014230:Triazoles / Q000633:toxicity
chemical_list: D006540:Herbicides; D007093:Imidazoles; D000073943:Neonicotinoids; D009574:Nitro Compounds; D010078:Oxazines; D010575:Pesticides; D010710:Phosphates; D012329:RNA, Bacterial; D012336:RNA, Ribosomal, 16S; D017262:Siderophores; D012989:Soil Pollutants; D013844:Thiazoles; D014227:Triazines; D014230:Triazoles; C082359:imidacloprid; D000077922:Thiamethoxam; C009235:metribuzin; C409722:hexaconazole