The influence of herbicides on the growth and proline content of primary roots and on the ultrastructure of root caps

Fayez, K. A.; Kristen, U.

doi:10.1016/0098-8472(95)00036-4

Cited by 46 publications

(35 citation statements)

References 24 publications

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“…Reduction in dry weight of shoot reached 29%, whereas the drop of root dry weight was 71%. Considerable reduction of root growth in the presence of sufonylurea herbicides was observed in many plants maize, wheat, bean, pea, broad bean (Royuela et al 1991;Fayez and Kristen 1996). If 100 nmol·dm -3 rimsulfuron was applied under salt conditions, the strongest inhibition in root and shoot growth was observed.…”

Section: Discussionmentioning

confidence: 97%

“…This is not surprising, because sulfonylurea herbicides drastically inhibit cell divisions in roots (Ray 1982;Rost 1984;Clayton and Reynolds 1991). Fayez and Kristen (1996) suggest that the herbicide-induced root growth reduction may be partially due to the injuries of root caps. The data regarding biochemical constituents indicate that the investigated stress factors led to significant changes in total protein and free amino compound contents.…”

Section: Discussionmentioning

confidence: 99%

“…These herbicides inhibit the activity of acetolactate synthase (ALS), the enzyme that catalyzes the first step in the biosynthesis of the branched amino acids valine, leucine and isoleucine and then alter protein metabolism (Ray 1984). It has been well documented that sulfonylureas reduce the availability of branched amino acid in treated plants, nevertheless the consequence of that reduction is an increase in the other amino acids (Royuela et al 1991;Scarponi et al 1995;Fayez and Kristen 1996). It is worthy of mention, that a low level of branched amino acids does not exert an inhibitory effect on protein accumulation in some plants (Clayton and Reynolds 1991).…”

Section: Introductionmentioning

confidence: 99%

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Response of maize (Zea mays L.) to rimsulfuron under salt conditions

2011

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Investigations were carried out to determine the possible interaction between salinity (60 mmol·dm -3 NaCl) and phytotoxicity of herbicide Titus 25 DF (sulfonylurea herbicide containing active ingredient rimsulfuron). The herbicide was added to the nutrient solution at two concentrations 1 or 100 nmol·dm -3 . After 7 days of cultivation in the nutrient solution determined were the growth parameters and some biochemical compounds (photosynthetic pigments, total protein and free amino compounds content). The combined action of 1 nmol·dm -3 rimsulfuron and salt caused a reduction in plant biomass accumulation, but this reduction was due to the salt itself. In the presence of 100 nmol·dm -3 rimsulfuron, growth inhibition of maize roots was very high and salinity did not modify herbicide toxicity. However, reduction in maize shoots growth equalled the sum of the reductions caused by each particular factor applied separately (additive effect). The reduction in shoot fresh weight reached 64%.The investigated stress factors induced a significant increase in amino compounds, with the exception of maize roots grown under NaCl plus 100 nmol·dm -3 rimsulfuron. The concentration of total protein in maize roots diminished under NaCl and 100 nmol·dm -3 rimsulfuron, although in the other cases, it did not change distinctly in comparison to the control. All factors, with the exception of NaCl, induced a slight increase in protein contents in maize leaves. Stress factors did not change significantly the total chlorophyll concentration, however, carotenoid content was markedly reduced. Nevertheless, the combined action of 100 nmol·dm -3 rimsulfuron and NaCl caused a 10% increase in carotenoid content as compared to the control plants.In conclusion, salinity did not change the toxicity of the herbicide applied in low dose (1 nmol·dm -3 ), but it did increase herbicide toxicity at high concentration (100 nmol·dm -3 ) regarding the maize shoots.

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Section: Discussionmentioning

confidence: 97%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Response of maize (Zea mays L.) to rimsulfuron under salt conditions

2011

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“…The higher seedling phytotoxicity could be attributed to pendimethalin concentration in the soil. Thus, a carryover of herbicide residues from one crop season to the following one may occur even through the development of modern herbicides has been directed toward a short half-live in the environment (Fayez and Kristen, 1996).…”

Section: Phytotoxicity Assessmentmentioning

confidence: 99%

Bioremediation of pendimethalin-contaminated soil

Belal¹,

El-Sayed²,

El-Nady³

2013

Afr. J. Microbiol. Res.

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One strain of microorganisms was isolated from soil previously treated with pendimethalin using enrichment technique and identified using 16S rDNA as Pseudomonas putida (E15). The effect of pH and temperature on the growth ability of the tested strain was investigated. The results show that the optimum pH and temperature for the growth of pendimethalin dissipating strain were 7 and 30°C, respectively. P. putida was used to dissipate pendimethalin from mineral liquid medium with half-live of 5.46 days. Pendimethalin half-live was 51.9 days in untreated mineral liquid medium. P. putida and compost were also evaluated for detoxification of pendimethalin in clay soil. P. putida and compost were effective in pendimethalin dissipation in soil with half-live of 4.67 and 5 days, respectively. Pendimethalin half-live was 62.43 days in untreated soil. Pendimethalin treatment affected analysis of the microbial population growing in P. putida or compost treating soil leachates showed an overall increase in the population of microorganisms. There is no toxicity of pendimethalin detected in soil on cucumber plants after treatment with P. putida or compost. Pendimethalin significantly decreased germination and increased cucumber seedlings mortality rate. P. putida and compost treatments increased the growth parameters. Moreover, no significant difference was observed in the most growth parameters between P. putida and compost treatments. Abnormal development of xylem tissue was observed in pendimethalin contaminated soil as a result of phytotoxicity. The results suggest that bioremediation by P. putida and compost was considered to be effective method for detoxification of pendimethalin in soil.

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“…Apart from this group, the chemical industry offers a large number of herbicides with different mode of action, changing the content of amino acids in plants by disturbing other metabolic pathways. Amino acid content in plant tissue may be affected not only by herbicides designed to inhibit amino acid biosynthesis, but also by other ones that influence nitrogen metabolism indirectly [7,8,9,10,11,12].…”

Section: Introductionmentioning

confidence: 99%

Amino acid content and biomass productivity of selected weed species as an indicator of their response to herbicide stress

2013

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A b s t r a c t Biomass reduction and amino acid content in plants of). The fresh weight of weeds and the content of free branched-chain amino acids (valine, leucine and isoleucine) in plant tissue were recorded. Tribenuron methyl was the herbicide that most limited biomass productivity, regardless of weed species and climate conditions. S. media was more sensitive to herbicides than P. rhoeas. Weed response to herbicides was dependent on temperature, but not on relative humidity. Tribenuron methyl applied to both weed species under various temperature regimes caused significant amino acid deficiency. The reduction in amino acid content in plants of P. rhoeas was greater at warm temperature compared to the cold regime due to stronger reaction to tribenuron methyl applied under these conditions. In most of cases, the mixture of 2.4-D + dicamba induced overproduction of amino acids.

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The influence of herbicides on the growth and proline content of primary roots and on the ultrastructure of root caps

Cited by 46 publications

References 24 publications

Response of maize (Zea mays L.) to rimsulfuron under salt conditions

Response of maize (Zea mays L.) to rimsulfuron under salt conditions

Bioremediation of pendimethalin-contaminated soil

Amino acid content and biomass productivity of selected weed species as an indicator of their response to herbicide stress

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