Sulfur Deprivation and Nitrogen Metabolism in Maize Seedlings

Friedrich, J. W.; Schrader, L. E.

doi:10.1104/pp.61.6.900

Cited by 96 publications

(50 citation statements)

References 5 publications

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“…A light dependence of nitrate reductase activity in plants has been shown in different systems (10,12). Several studies have established regulatory interactions between the pathway of assimilatory sulfate and nitrate reduction (1,3,9,17,25). Our results indicate that in LemnaOAS could be a positive signal from the pathway of nitrate assimilation to that of sulfate assimilation, thus establishing a coordination of both pathways.…”

Section: Aps Sulfotransferasementioning

confidence: 48%

Regulation of Sulfate Assimilation by Light and O-Acetyl-l-Serine in Lemna minor L.

Neuenschwander

Suter²,

Brunold³

1991

Plant Physiol.

104

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The effect of 0.5 millimolar O-acetyl-L-serine added to the nutrient solution on sulfate assimilation of Lemna minor L., cultivated in the light or in the dark, or transferred from light to the dark, was examined. During 24 hours after transfer from light to the dark the extractable activity of adenosine 5'-phosphosulfate sulfotransferase, a key enzyme of sulfate assimilation, decreased to 10% of the light control. Nitrate reductase (EC 1.7.7.1.) activity, measured for comparison, decreased to 40%. Adenosine 5'-triphosphate (ATP) sulfurylase (EC 2.7.7.4.) and O-acetyl-L-serine sulfhydrylase (EC 4.2.99.8.) activities were not affected by the transfer. When O-acetyl-L-serine was added to the nutrient solution at the time of transfer to the dark, adenosine 5'-phosphosulfate sulfotransferase activity was still at 50% of the light control after 24 hours, ATP sulfurylase and O-acetyl-L-serine sulfhydrylase activity were again not affected, and nitrate reductase activity decreased as before. Addition of O-acetyl-L-serine at the time of the transfer caused a 100% increase in acid-soluble SH compounds after 24 hours in the dark. In continuous light the corresponding increase was 200%. During 24 hours after transfer to the dark the assimilation of 35S042-into organic compounds decreased by 80% without O-acetyl-L-serine but was comparable to light controls in its presence. The addition of O-acetyl-L-serine to Lemna minor precultivated in the dark for 24 hours induced an increase in adenosine 5'-phosphosulfate sulfotransferase activity so that a constant level of 50% of the light control was reached after an additional 9 hours. Cycloheximide as well as 6-methylpurine inhibited this effect. In the same type of experiment 0-acetyl-L-serine induced a 100-fold increase in the incorporation of label from 35S042-into cysteine after additional 24 hours in the dark. Taken together, these results show that exogenous 0-acetyl-L-serine has a regulatory effect on assimilatory sulfate reduction of L. minor in light and darkness. They are in agreement with the idea that this compound is a limiting factor for sulfate assimilation and seem to be in contrast to the proposed strict light control of sulfate assimilation. Light (3,21,26) and the rate of nitrate assimilation or the availability of amino acids (4,16,17,25)

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Section: Aps Sulfotransferasementioning

confidence: 48%

Regulation of Sulfate Assimilation by Light and O-Acetyl-l-Serine in Lemna minor L.

Neuenschwander

Suter²,

Brunold³

1991

Plant Physiol.

104

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“…Upon exposure to As stress plants need to harmonize biosynthesis and consumption of thiols to achieve a new state of metabolic equilibrium to combat the stress, and sulfur was the main component of thiols (Friedrich andSchrader 1978, Mishra 2008). Once exposed to As, level of thiols would decline due to their consumption in As detoxification.…”

Section: Resultsmentioning

confidence: 99%

Effects of sulfur application on sulfur and arsenic absorption by rapeseed in arsenic-contaminated soil

Zhong¹,

Hu²,

Tan³

et al. 2011

Plant Soil Environ.

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A pot experiment was conducted to study the effects of arsenic (As) and sulfur (S) interaction on yield and their accumulation and distribution in rapeseed (Brassica napus L.). The results showed that (1) at the same level of S treatment, application of As significantly decreased rapeseed grain and biomass yield; (2) Application of S significantly increased the grain and biomass yield of rapeseed when As was applied; (3) When As application rate increased, As content significantly increased in different parts of rapeseed, and reached their highest level at<br />120 mg/kg As. Arsenic content from seed were all below 1 mg/kg AS. Addition of S significantly reduced As contents in root and grain of rapeseed.

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“…The decline in seed yield with N fertilization on S-deficient soils could be considered due to excessive accumulation of toxic levels of N metabolites in the plant. The N absorbed in excess of protein synthesis requirement accumulates as nitrates, amides and free amino acids (Stewart and Porter 1969;Friedrich and Schrader 1978) and excessive levels of these metabolites are considered to be toxic (Steinberg et al 1950). Relatively severe negative impacts on seed yield in comparison to straw yield have been also observed in previous studies when N alone was applied to S-deficient soils (Janzen and Bettany 1984a;Nyborg et al 1974).…”

Section: Yieldmentioning

confidence: 99%

Effectiveness of sulphate-S fertilization at different growth stages for yield, seed quality and S uptake of canola

Malhi¹,

Gill²

2002

Can. J. Plant Sci.

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Malhi, S. S. and Gill, K. S. 2002. Effectiveness of sulphate-S fertilization at different growth stages for yield, seed quality and S uptake of canola. Can. J. Plant Sci. 82: 665-674. Canola (Brassica napus L. and B. rapa L.) is an important cash crop in the Prairie Provinces of Canada. The majority of canola is grown in the Parkland zone where many soils are deficient or potentially deficient in plant-available S for optimum seed yield of canola. Because canola has high S requirements and S is immobile in plants, its deficiency can occur any time during the growing season and drastically reduce canola seed yield, particularly on soils fertilized well with N and P. The objective of this study was to assess the effectiveness of sulphate-S fertilizer (potassium sulphate) applied using various application methods at seeding and during the growing season for yield, seed quality and S uptake of canola on S-deficient soils. Six field experiments (two sites per year from 1998 to 2000) were conducted on Grey Luvisol soils in northeastern Saskatchewan. Fertilizer treatments were no fertilizer, N (120 kg N ha -1 ) alone at seeding, S (30 kg S ha -1 ) alone at seeding, and N (120 kg N ha -1 ) at seeding + S (15 and 30 kg S ha -1 ) at seeding, bolting and flowering stages of canola. Methods of S application were surface broadcast and incorporated into the soil, sidebanded and seedrow placed at seeding, and topdressed and foliar sprayed at bolting and early flowering. Canola at all experimental sites showed severe S deficiency symptoms. Compared to N alone, N + S fertilization increased yield, oil content and S uptake of seed in all cases, increased yield and S uptake of seed + straw in most cases, while protein content of seed and S index (ratio of S uptake in seed to S uptake in seed + straw) were not influenced consistently. A trend of seeding > bolting > flowering time of S applications was generally shown by yield and S uptake of seed and seed + straw, and by S index. There were no noticeable differences among treatments applied at seeding. Topdressing at bolting and flowering tended to produce less seed yield than foliar-applied S in few cases and method of S application had no consistent effect on other parameters. Increasing the rate from 15 to 30 kg S ha -1 generally increased yield and S uptake of seed and seed + straw, but had no consistent effect on oil and protein contents in seed and S index. Fertilizer S alone tended to increase yield, oil content and S uptake of seed but had no effect on seed protein content. However, application of N alone tended to reduce yield, oil content and S uptake of seed while it had an inconsistent effect on yield and S uptake of seed + straw and S index. In conclusion, application of sulphate-S fertilizer on S-deficient soils improved yield, seed quality and S uptake of canola, with applications at seeding generally more effective than at bolting and early flowering stages. The results suggest that application of sulphate-S can correct S deficiency in canola if it occurs in the gro...

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Sulfur Deprivation and Nitrogen Metabolism in Maize Seedlings

Cited by 96 publications

References 5 publications

Regulation of Sulfate Assimilation by Light and O-Acetyl-l-Serine in Lemna minor L.

Regulation of Sulfate Assimilation by Light and O-Acetyl-l-Serine in Lemna minor L.

Effects of sulfur application on sulfur and arsenic absorption by rapeseed in arsenic-contaminated soil

Effectiveness of sulphate-S fertilization at different growth stages for yield, seed quality and S uptake of canola

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