Effect of boron on nitrate reductase activity in young sunflower plants

Kastori, R.; Petrović, Novica

doi:10.1080/01904168909363978

Cited by 26 publications

(17 citation statements)

References 8 publications

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“…Boron is an essential element for higher plants not only due to its role in the maintenance of cell wall structure, but also because Downloaded by [University of California, San Francisco] at 08:13 01 December 2014 its deficiency causes a drastic decrease in leaf nitrate content, which leads to a decline in NRA. Kastori and Petrovic (1989) also reported that toxic B rates caused NO 3 accumulation in young sunflower plants.…”

Section: Discussionmentioning

confidence: 94%

Boron Toxicity Alters Nitrate Reductase Activity, Proline Accumulation, Membrane Permeability, and Mineral Constituents of Tomato and Pepper Plants

Eraslan

İnal

Güneş

et al. 2007

Journal of Plant Nutrition

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Boron (B) toxicity is an important disorder that can limit plant growth on soils of arid and semi arid environments throughout the world. Although of considerable agronomic importance, our understanding of B toxicity is rather fragmented and limited. The effects of increasing levels of B (0, 0.5, 5, 50 mg kg −1 ) on plant growth, proline accumulation, membrane permeability, nitrate reductase activity (NRA), and mineral nutrient interactions of tomato and pepper plants were investigated in greenhouse conditions. Increasing levels of B increased the B contents of plants. Boron toxicity symptoms occurred at 5 and 50 mg kg −1 levels. Fresh and dry weights of the plants clearly decreased with the application of the 50 mg kg −1 level of B. Membrane permeability and proline accumulation were significantly increased by the 50 mg kg −1 level of B. Nitrate reductase activity of tomato plants was increased with increasing levels of B. With the exception of potassium (K) and calcium (Ca) in pepper and magnesium (Mg) in tomato, B treatments significantly affected nutrient concentrations of tomato and pepper. Except for sulfur (S) and Ca in tomato, the highest rate of B applied increased the N, phosphorus (P), and K concentrations of tomato and N, P, Mg, and S concentrations of pepper.

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Section: Discussionmentioning

confidence: 94%

Boron Toxicity Alters Nitrate Reductase Activity, Proline Accumulation, Membrane Permeability, and Mineral Constituents of Tomato and Pepper Plants

Eraslan

İnal

Güneş

et al. 2007

Journal of Plant Nutrition

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“…In sugarbeet ( Beta vulgaris ), tomato, sunflower ( Helianthus annuus ), corn ( Zea mays ) and oilseed rape ( Brassica napus ) deficient in B, NO 3 − concentrations rise as a consequence of reduced NO 3 − reductase (NR) (EC 1.6.6.1) activity (Bonilla et al. 1988; Kastori & Petrovic 1989; Ramon et al. 1989; Shen et al.…”

Section: Introductionmentioning

confidence: 99%

Response of nitrogen metabolism to boron toxicity in tomato plants

et al. 2009

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Boron (B) toxicity has become important in areas close to the Mediterranean Sea where intensive agriculture has been developed. The objective of this research was to study the effects of B toxicity (0.5 mM and 2.0 mM B) on nitrogen (N) assimilation of two tomato cultivars that are often used in these areas. Leaf biomass, relative leaf growth rate (RGR(L)), concentration of B, nitrate (NO(3) (-)), ammonium (NH(4) (+)), organic N, amino acids and soluble proteins, as well as nitrate reductase (NR), nitrite reductase (NiR), glutamine synthase (GS), glutamate synthetase (GOGAT) and glutamate dehydrogenase (GDH) activities were analysed in leaves. Boron toxicity significantly decreased leaf biomass, RGR(L), organic N, soluble proteins, and NR and NiR activities. The lowest NO(3) (-) and NH(4) (+) concentration in leaves was recorded when plants were supplied with 2.0 mM B in the root medium. Total B, amino acids, activities of GS, GOGAT and GDH increased under B toxicity. Data from the present study prove that B toxicity causes inhibition of NO(3) (-) reduction and increases NH(4) (+) assimilation in tomato plants.

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“…If these treatments were successful under field conditions, then the leaching of NO; from the soil should also be reduced (8,9). Other research conducted in the greenhouse has shown that adverse boron nutrition (deficiency and toxicity) causes the accumulation of nitrate in plants, presumably by preventing its metabolism within the plant (10,11).…”

mentioning

confidence: 95%

Broccoli yield and nitrogen composition in response to different management regimes

Liu

Shelp

1993

Communications in Soil Science and Plant Analysis

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A three-year study was undertaken to investigate the response of fieldgrown broccoli (Brassica oleracea var. italica) to different management regimes (i.e. various NH + 4 :NO -3 ratios, the addition of a nitrification inhibitor known as nitrapyrin, and boron nutrition). None of the treatments influenced the harvestable yield and the composition of N in xylem and phloem saps and plant tissue. The total N (NH + 4 , NO -3 and amino acids) and the mol % NH + 4 in the xylem sap decreased over the growing season. The NH + 4 constituted up to 20% of the xylem sap-N, suggesting that this N form, as well as NO -3 , is being absorbed from the soil. The substantial recovery of NO -3 in xylem sap (30-70% N) indicates that with an adequate N supply, at least a portion of the incoming NO -3 is reduced in the shoot. The concentrations of NH + 4 , NO -3 , amino acids and proteins in the tissues declined during the growing season and from the bottom to the top of the shoot.The concentrations of NO -3 in the florets, which ranged from 1 to 154 mg N kg -1 fresh weight, are considered to be under permissible levels by European standards, whereas some of those in the foliage exceeded the permissible levels. Cultivar differences in NO -3 accumulation were evident within and between study sites.

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Effect of boron on nitrate reductase activity in young sunflower plants

Cited by 26 publications

References 8 publications

Boron Toxicity Alters Nitrate Reductase Activity, Proline Accumulation, Membrane Permeability, and Mineral Constituents of Tomato and Pepper Plants

Boron Toxicity Alters Nitrate Reductase Activity, Proline Accumulation, Membrane Permeability, and Mineral Constituents of Tomato and Pepper Plants

Response of nitrogen metabolism to boron toxicity in tomato plants

Broccoli yield and nitrogen composition in response to different management regimes

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