Multiphasic Uptake of Sulfate by Barley Roots I. Effects of Analogues, Phosphate, and pH

Vange, Marta S.; Holmern, Kari; Nissen, P.

doi:10.1111/j.1399-3054.1974.tb03709.x

Cited by 68 publications

(45 citation statements)

References 24 publications

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“…luteoviolaceus is its weak response to thiosulfate, normally a very effective inh ibitor of su lfate uptake (Bradfie ld et a 1. , 1970;Dreyfuss, 1964;Marzluf, 1970a;Pardee et aL., 1966; Roberts and Marluf, 1971; Smith1 976; Utkilen et al, 1976;Vange et al, 1974;Yamamoto and Segel, 1966). No concentration-dependent inhibition is observed with thiosulfate at concentrat ions up to 10 times that of su lfate (Table 3-3), and 'only 59 % inhibition is obtained when thiosulfate is present at 50 times the sulfate concentration.…”

Section: Effect Of Thiosulfate On Sulfate Uptake ëL ~ Luteo-violaceusmentioning

confidence: 99%

“…Competitive inhibition of uptake by these anions (Smith, 1976;Vange et al, 1974) reveals an inverse relationship between the inhibitory power of the analog and the atomic weight of X, demonstrating effective size selectivity . Sulfate and its analogs are all effective in liberating inorganic pyrophosphate from ATP in the intracellular activation of sulfate to adenosine-5'-phosphosulfate (Bandurski et aL., 1956 -55-It is likely that these structurally similar compounds are transported by the same permease, as shown for chromate in Neurospora crassa (Roberts and Marluf, 1971).…”

Section: Gramsmentioning

confidence: 99%

“…The substitution of a reduced sulfur atom for one of the four equivalent oxygen atoms of sulfate yields an analog which is not only an effective inhibitor of sulfate uptake (Marzluf, 1970a;Roberts et al, 1963;Smith, 1976;Utkilen et al, 1976;Vange et al, 1974;Yamamoto and Segel, 1966) -56-but alSo supports normal growth as the sole sulfur source in a wide variety of organisms (Hart and Filner, 1969;Hodson et aL., 1971;Leinweber and Monty, 1963;Marzluf, 1970b;Ramus, 1974;Roberts et al, 1963).…”

Section: Gramsmentioning

confidence: 99%

“…'logs (X=Cr, Se, and Mo) common to other transport systems (Jeanjean and Broda, 1977;Pardee et aL., 1966;Ramus, 1974;Smith, 1976;Vange et aL., 1974;Yamamoto and Segel, 1966) is observed with A. luteo-violaceus. Kinet ic constants for P. ~alodurans and A. luteo-viûlaceus are sum ari zed in Tab le 3-4.…”

mentioning

confidence: 99%

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Assimilatory sulfur metabolism in marine microorganisms

Cuhel¹

1980

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Section: Effect Of Thiosulfate On Sulfate Uptake ëL ~ Luteo-violaceusmentioning

confidence: 99%

Section: Gramsmentioning

confidence: 99%

Section: Gramsmentioning

confidence: 99%

mentioning

confidence: 99%

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Assimilatory sulfur metabolism in marine microorganisms

Cuhel¹

1980

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“…Interpretations of anion interactions with respect to absorption were based on parameters describing their respective saturation kinetics, namely slope and intercepts (8,14). Based on graphic representations and computed constants for absorption in the absence and presence of competing anions, sulfate, selenate, molybdate, and phosphate appear to be competitive analogs (common Vmax, increased K5) in the absorption of TcO4-by plant roots; calculated K, values were (7,160,17, and 14 gM, respectively).…”

Section: Resultsmentioning

confidence: 99%

Root Absorption and Transport Behavior of Technetium in Soybean

Cataldo

Wildung²,

Garland³

1983

Plant Physiol.

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The absorption characteristics and mechanisms of pertechnetate (TcO47) uptake by hydroponically grown soybean seedlings (Glycinemax cv Williams) were determined. Absorption from 10 micromolar solutioDs was linear for at least 6 hours, with 30% of the absorbed TcO47 being transferred to the shoot. Evaluation of concentration-dependent absorption rates from solutions containing 0.02 to 10 micromolar Technetium-99 is currently projected to be one of the most important isotopes associated with the nuclear fuel cycle based on potential long-term dose to man. This is based on a number of criteria including fission yield (6%), long half-life (2.13 x l0 year), mobility and persistence in soils as the pertechnetate ion (TcO4-), and its comparatively high availability for plant absorption (11,19 for radiation-induced damage and suggested an interaction or substitution of Tc for an essential nutrient. Pertechnetate has been shown to be toxic to a number of algae and bacteria, and interfere with both respiration and photosynthesis (9) at concentrations in excess of 1 mm. The potential interaction of Tc with nutrient ion metabolism is supported by uptake inhibition studies which showed 9Tc4O uptake to be reduced by the presence of sulfate, selenate, phosphate, and molybdate (6).The purpose ofthe present study is to evaluate the parameters associated with TcO4-absorption by plant roots, and the kinetics of its interaction with essential nutrient elements and nonnutrient elements with chemical similarities.MATERIALS AND METHODS Plant Culture. Seeds of Glycine max cv Williams were germinated on moist filter paper and individual seedlings transferred to 600-ml beakers containing 500 ml ofaerated nutrient solution 3 d following germination. The nutrient solution contained 150 mg of KCI, 120 mg of MgSO4, 946 mg of Ca(N03)2 4H20, 68 mg of KH2PO4, 0.06 mg of ZnSO4.7H20, 0.69 mg of H3BO3, 0.017 mg of CuC12-2H20, 0.024 mg of Na2MoO4-2H20, 0.022 mg of MnCl2-4H20, and 0.60 mg of Fe+3 (as Fe EDDHA) per liter. The pH was adjusted to 6.8 with KOH and solutions changed three times a week. Plants were maintained in controlled-environment chambers with a 16-h light cycle (-500 ME m-2 s ', PAR, at leaf surface), a day/night temperature cycle of 26/22C, and 50% RH.Technetium Uptake. Evaluation of the absorption behavior of Tc was performed using 10-to 12-d-old plants. Prior to use, plants were transferred from nutrient solutions to 0.5 mM CaCl2 solutions (pH 6.8) for 12 h to allow for desorption of possible interfering ions from root surfaces. Individual plants were transferred to aerated solutions containing 500 ml 0.5 mm CaC12 (MCB, suprapure) and various concentrations of NH49Tc04. Following the absorption period, which was 2 h except as noted, plants were transferred to either complete nutrient solution or 0.5 mM CaC12 solutions containing 10 mm KH2PO4 or K2S04. Ions were desorbed from roots using three changes of solution for a total of 20 min.The influence of H+ concentration on Tc absorption and transfer from root to shoot was d...

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Effect of Nutrient Availability on Root System Development

Alfredo

Calderón‐Vázquez

Herrera-Estrella

2018

Annual Plant Reviews Online

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Modern‐day plant root systems have been modeled from distinct ancestors and by different evolutionary pathways influenced by environmental cues, leading to varied root system architectures. Availability of mineral nutrients has played a major role in evolution and development of the diverse root system architectures. In this chapter, we review the importance of the study of mineral nutrition on root development and describe the physiological, morphological and molecular responses of plant roots to diverse nutrient deficiencies and how the different hormone signaling pathways participate in these responses.

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Multiphasic Uptake of Sulfate by Barley Roots I. Effects of Analogues, Phosphate, and pH

Cited by 68 publications

References 24 publications

Assimilatory sulfur metabolism in marine microorganisms

Assimilatory sulfur metabolism in marine microorganisms

Root Absorption and Transport Behavior of Technetium in Soybean

Effect of Nutrient Availability on Root System Development

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