Effects of Carbaryl and 1-Naphthol on Soil Population of Cyanobacteria and Microalgae and Select Cultures of Diazotrophic Cyanobacteria

Megharaj, Mallavarapu; Venkateswarlu, Kadiyala; Naidu, Ravi

doi:10.1007/s00128-011-0347-3

Cited by 8 publications

(2 citation statements)

References 22 publications

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“…The pesticides are known to interfere with the synthesis of Chl a pigment by inhibiting the formation of porphyrin rings (Moreland, 1980;Lal and Saxena, 1980). In the present work, the low level of Chl in pesticide treated samples supports the observations of Das & Adhikary, 1996, Megharaj et al, 2011, Kumar et al, 2008, Battah et al, 2001Sikha &Singh, 2004 andXia, 2005. …”

Section: Changes In Chlorophyl a Contentssupporting

confidence: 80%

Photosynthetic Response of Two Rice Field Cyanobacteria to Pesticides

Nayak¹,

Bhattacharyya²,

Sahu³

2012

Pesticides - Advances in Chemical and Botanical Pesticides

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Section: Changes In Chlorophyl a Contentssupporting

confidence: 80%

Photosynthetic Response of Two Rice Field Cyanobacteria to Pesticides

Nayak¹,

Bhattacharyya²,

Sahu³

2012

Pesticides - Advances in Chemical and Botanical Pesticides

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“…and Nostoc sp. (Megharaj et al, 2011). The nontarget effect of carbaryl was seen at a middle toxic level at 40 µg/mL against N 2 -fixing Calothrix brevissima, at which level carbaryl caused decrease in carotenoids, chlorophylls, phycobilins and protein contents by 63%, 43%, 40% and 40%, respectively (Habib et al, 2011).…”

mentioning

confidence: 97%

Probit Analysis of Carbamate-Pesticide-Toxicity at Soil-Water Interface to N2-Fixing Cyanobacterium Cylindrospermum sp

Padhy¹,

Rath²

2015

Rice Science

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Toxicity-data of two carbamate insecticides, carbaryl and carbofuran, and three fungicides, ziram, zineb and mancozeb with rice-field N 2 -fixing cyanobacterium Cylindrospermum sp., obtained by in vitro growth and at soil-water interface, were analyzed by the probit method. Growth enhancing concentration, no-observed effective concentration, minimum inhibitory concentration, the highest permissive concentration and lethal concentration 100 (LC 100 ) were determined experimentally. The LC 50 values of carbaryl, carbofuran, ziram, zineb and mancozeb in N 2 -fixing liquid medium were 56.2, 588.8, 0.07, 4.2 and 3.4 μg/mL, respectively, whereas the corresponding LC 100 values were 100.0, 1500.0, 0.17, 25.0 and 9.0 μg/mL, respectively. The LC 50 values of these pesticides in succession in N 2 -fixing agar medium were 44.7, 239.9, 0.07, 1.8 and 2.3 μg/mL, respectively, whereas the corresponding LC 100 values were 100.0, 600.0, 0.17, 10.0 and 7.0 μg/mL, respectively. Similar results with nitrate supplemented liquid and agar media indicated that nitrate supplementation had toxicity reducing effect. The LC 50 and LC 100 values of toxicity in the N 2 -fixing liquid medium at soil-water interface were 91.2 and 200.0 μg/mL for carbaryl, 2 317 and 6 000 μg/mL for carbofuran, 0.15 and 0.50 μg/mL for ziram, 16.4 and 50.0 μg/mL for zineb, and 7.2 and 25.0 μg/mL for mancozeb, respectively. Each LC 100 value at soilwater interface with a pesticide was significantly higher than its corresponding LC 100 value at liquid/agar media. It can be concluded that, under the N 2 -fixing conditions, the cyanobacterium tolerated higher levels of each pesticide at soil-water interface.

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Insights into metabolism and sodium chloride adaptability of carbaryl degrading halotolerant Pseudomonas sp. strain C7

et al. 2017

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Pseudomonas sp. strain C7 isolated from sediment of Thane creek near Mumbai, India, showed the ability to grow on glucose and carbaryl in the presence of 7.5 and 3.5% of NaCl, respectively. It also showed good growth in the absence of NaCl indicating the strain to be halotolerant. Increasing salt concentration impacted the growth on carbaryl; however, the specific activity of various enzymes involved in the metabolism remained unaffected. Among various enzymes, 1-naphthol 2-hydroxylase was found to be sensitive to chloride as compared to carbaryl hydrolase and gentisate 1,2-dioxygenase. The intracellular concentration of Cl ions remained constant (6-8 mM) for cells grown on carbaryl either in the presence or absence of NaCl. Thus the ability to adapt to the increasing concentration of NaCl is probably by employing chloride efflux pump and/or increase in the concentration of osmolytes as mechanism for halotolerance. The halotolerant nature of the strain will be beneficial to remediate carbaryl from saline agriculture fields, ecosystems and wastewaters.

show abstract

Effects of Carbaryl and 1-Naphthol on Soil Population of Cyanobacteria and Microalgae and Select Cultures of Diazotrophic Cyanobacteria

Cited by 8 publications

References 22 publications

Photosynthetic Response of Two Rice Field Cyanobacteria to Pesticides

Photosynthetic Response of Two Rice Field Cyanobacteria to Pesticides

Probit Analysis of Carbamate-Pesticide-Toxicity at Soil-Water Interface to N2-Fixing Cyanobacterium Cylindrospermum sp

Insights into metabolism and sodium chloride adaptability of carbaryl degrading halotolerant Pseudomonas sp. strain C7

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