Calcium and Magnesium Uptake by Barley Seedlings

Lazaroff, Norman; Pitman, M. G.

doi:10.1071/bi9660991

Cited by 55 publications

(28 citation statements)

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“…A high amount of calcium present in the plant is a result of high element levels existing in the soil more than the plant's uptake efficiency, the velocity of the plant's transpiration (Michael and Marschner, 1962;Lazaroff and Pitman, 1966;Sawan et al, 1997), or the addition of liming materials to soil (Hettiarachchi and Sinclair, 2002). However, Warncke et al (2002) found that although lime application increased the calcium and magnesium concentration in the soil, it had no effect on the element levels in asparagus ferns growing there.…”

Section: Introductionmentioning

confidence: 95%

Calcium and Magnesium Levels in Agricultural Soil and Sewage Sludge in an Industrial Area from Southeastern Spain: Relationship with Plant (Saccharum officinarum) Disposition

Jodral-Segado

Navarro-Alarcón

Serrana

et al. 2006

Soil and Sediment Contamination: An International Journal

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This investigation was initiated to assess the following objectives: (1) to measure the total calcium and magnesium content in agricultural soil and sewage sludge from the Mediterranean coastal area of Motril (southeastern Spain); (2) to determine the pH values of indicated samples in order to IntroductionCalcium is readily evident in alkaline soil and is very scarce in very acidic silicon soil. Weathering and rainfall in the area has a large impact on the chemical composition and calcium levels in the surrounding soil. In soil from arid or semiarid zones, high calcium concentrations have been found (Ganor and Mamame, 1982; Löye-Pilot et al., 1986;Young et al., 1988). Lower levels of acidity, less rainfall, and therefore less erosion, enhance the stability of minerals like the calcium in the soil's clay. As a result, the high calcium content will tend to flocculate in the upper profile of the soil's clay (Ruhe, 1984). Phillips and Chiy (2002), after applying sodium fertilizers, observed an enhancement of calcium concentrations in leachate. Similarly, an increase in calcium, magnesium, and pH values was observed in tropical agricultural soil after applying compost (Slattery et al., 2002;Soumare et al., 2003).In soil, magnesium is present mainly in inorganic compounds, although considerable amounts also appear associated with the organic material in humus (Sutcliffe and Baker, 1983). It is known that the principal portion of exchangeable magnesium is associated with clay particles. Exhaustion of the soluble magnesium cation in the soil by microorganisms and the plant's roots provokes uptake of the solid (non-soluble) mineral, which affects the nonexchangeable fraction. On the other hand, when the soil's acidity increases, a diminishment of available magnesium is observed due to the fact that hydrogen ions occupy a high number of the exchange sites (Sutcliffe and Baker, 1983). Studies indicate that in coastal areas magnesium enters the atmosphere from the sea because this element is one of the main constituents of marine aerosols.It is known that magnesium uptake by plants is affected by the presence of other cations such as ammonium, potassium, manganese, and sulphur (Pessarakli, 1995; Phillips and Chiy, 2002). For high levels of pH, the ratios of Mg/Ca, Mg/K and Mg/Al, rather than the magnesium concentration alone, are related to the element flux in plants (Rengel and Robinson, 1990).The existence of calcium and magnesium in soil is related to several factors, including geographic location, type of rock, pH, nature of drainage water, clay content, cation exchange capacity, weathering and climatic conditions, and type of plant grown (Young et al.,

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Section: Introductionmentioning

confidence: 95%

Calcium and Magnesium Levels in Agricultural Soil and Sewage Sludge in an Industrial Area from Southeastern Spain: Relationship with Plant (Saccharum officinarum) Disposition

Jodral-Segado

Navarro-Alarcón

Serrana

et al. 2006

Soil and Sediment Contamination: An International Journal

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“…The pH was maintained at 6.0 ± 0. 3 (13 ) iIn which there was no effect of mlonovaleint catiolls at lower coincentration ranges ('2000-5000 -\t with K :Na in ratio 1:3) oni Ca absorption l)yarlev l)lants.…”

Section: Inereasinig Coneentrations Of K Generally Depressmentioning

confidence: 99%

“…Lazaroff and Pitman (13) found the depressive effect of monovalent cations on Ca content to be confined to the tops of barley plants and to occur only at high concentrations of monovalent cations (5000-60,000 /AI Na + K). This depressive effect of monovalent cations was attributed (13) to reduced transpiration at high monovalent ion concentrations with a consequent reduction in Ca transport to tops. There was no depression of Ca content in tops at lower concentrations (2000 to 5000 F.M Na + K).…”

Section: Inereasinig Coneentrations Of K Generally Depressmentioning

confidence: 99%

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Interactions Between Potassium and Calcium in Their Absorption by Intact Barley Plants. I. Effects of Potassium on Calcium Absorption

1968

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“…Moore et al (17) followed the uptake of Mg2+ by excised barley roots as influenced by Ca2'. Attention to interactions of several cations, however, is very limited and the interactions are not understood (6,10).…”

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confidence: 99%

Magnesium Uptake by Soybeans

Leggett

Gilbert

1969

Plant Physiol.

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Abstract. Magnesium contents of soybean (Glycine max) roots increase and the K and Ca contents decrease with increased MgCl., ooncentrations in ambient solutions. The Mg uptake is inhibited when both Ca and K are present in the solution, but not by K or Ca alone.Chloride uptake, which is very low from the MgCl, solution, is greatly enhanced by the presence of K. The selectivity against Mg imparted by K +-Ca appears to be at an external barrier for cation uptake as shown by its dependence on the presence of Ca in the external solution. experiment. It was more convenient to adjust the root to solution ratios based upon previous experience such that the final pH valuies would be in the range of 5.1 to 5.5.At the end of the experimental period, the roots were rinsed, transferred to beakers, and heated in a muffle oven to 4800 for 2 hr. The ash was dissolved in 20 ml of 0.1 H1NO, and 10 % acetic acid solution anld reserved for analysis.Chloride analysis of plant roots after the above dry-ashing procedure was compared with the analysis after several hot water extractions. The Cl-value was the same for both procedures. However, Cl will be lost if the ash is maintained at 4800 for more than 8 hr. Selection *of the 2-hr period was made on the basis of complete ashing and no Cl-loss. WVe did not attempt to relate Cl-loss more precisely to the ashing period.Intact Planits. Lots of 5 dark-germinated seeds were placed on gauze in a holder with their roots extending into a 0.2 mni CaSO4 solution. These lots wkNere grow^n on a 15-hr day at 270 for 7 days when the first trifoliolate leaf w7as expanding. At this time, the 5 plants had protduced about 2 g of roots and 3 to 4 g wet weight of shoots. The lots were transferred after rinsinig to experimental solutions as desired. Roots and shoots were separated at the end of the experimental period and prepared for analysis as described for excised roots.

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Calcium and Magnesium Uptake by Barley Seedlings

Cited by 55 publications

References 7 publications

Calcium and Magnesium Levels in Agricultural Soil and Sewage Sludge in an Industrial Area from Southeastern Spain: Relationship with Plant (Saccharum officinarum) Disposition

Calcium and Magnesium Levels in Agricultural Soil and Sewage Sludge in an Industrial Area from Southeastern Spain: Relationship with Plant (Saccharum officinarum) Disposition

Interactions Between Potassium and Calcium in Their Absorption by Intact Barley Plants. I. Effects of Potassium on Calcium Absorption

Magnesium Uptake by Soybeans

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