Potassium-Boron and Calcium-Boron Relationships in Plant Nutrition

Reeve, Eldrow; Shive, J. W.

doi:10.1097/00010694-194401000-00001

Cited by 78 publications

(26 citation statements)

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“…The physiological importance of the soluble boron fraction (cell sap obtained by mechanical pressure) in plants has been pointed out (4,5,7,8) but this fraction has generally not been further separated. Shive (8) has shown that monocotyledonous plants contain greater amounts of soluble boron than do dicotyledonous species which is perhaps the reason.…”

Section: Methodsmentioning

confidence: 99%

Distribution of Boron in Cells of Dicotyledonous Plants in Relation to Growth.

Skok

McIlrath²

1958

Plant Physiol.

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Relatively little is known about the locus of boron in the plant cell or its availability for movement from one site to another. It appears that little or no reutilization of boron occurs in dicotyledonous plants, and an external available supply is needed throughout the period of growth. As the borate ion complexes readily with various polyhydroxy compounds (13), localization of boron in certain cellular fractions might not necessarily imply an important physiological role at these sites; nevertheless, information on its distribution or localization within the plant cell could contribute to a better understanding of its function.Boron determinations on various intracellular fractions separated by differential centrifugation indicated certain consistent trends regarding the distribution of boron within the cell, particularly in relation to growth, boron utilization and boron availability. These results have been briefly summarized (12) and will be reported fully here. MATERIALS AND METHODSSunflower (Helianthus annuus L., var. Mammoth Russian) and mung bean (Phaseolus aureus Roxb.) were grown in nutrient solutions in a controlledenvironment room under conditions previously described (10). The seeds were sown in quartz sand, watered with tap water, and one week later the seedlings were transferred to nutrient solutions contained in wide-mouth, low-boron soft glass quart fruit jars wrapped in black cloth. The sunflower plants were grown in solutions of the macronutrient composition previously described (10); the solutions for the mung beans consisted of a one-eighth concentration of Hoagland and Arnon's no. 1 solution (3). Iron, manganese, zinc and copper were added to both solutions at concentrations of 5.0, 0.5, 0.05 and 0.02 ppm respectively.As Plants were harvested at several periods for various determinations. Twenty-five g fresh tissue samples were used; this included the terminal bud regions and the blades of the two youngest, fully expanded leaves of about 11 plants for sunflower and the terminal bud regions and the leaflets from the youngest, fully expanded leaf of about 45 plants for mung bean. The samples were prepared and separated into various intracellular fractions by the procedure used bv Gordon (2). The tissue was ground in a chilled mortar with the aid of acid-washed sand in 50 ml phosphate buffer, 0.2 M, of pH 7.0, made 0.3 M with sucrose. The homogenate was strained through 200-mesh nylon cloth; the material that passed through is designated homogenate filtrate and that remaining in the cloth as homogenate residue (

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Section: Methodsmentioning

confidence: 99%

Distribution of Boron in Cells of Dicotyledonous Plants in Relation to Growth.

Skok

McIlrath²

1958

Plant Physiol.

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“…In these two leaves there was ani increase from the first to the second date the leaves were samlpled (perio(ds 4-5) before the concentration (lecreased. In the youngest leaves the concentration continues to (lecline after symptomlis have appeared (periods [7][8][9][10][11][12] (table II).…”

Section: Symptoms Appeared -mentioning

confidence: 99%

Translocation & re-use of boron in broccoli

1961

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The question of boron mobility and re-use in planits has not been adequately investigated. It is often dismissed with the statenment that a continuous supply of boron is necessary during growth because boron cannot be stored and re-use(l. However, there is evidence that boron is not entirely immobile, although re-use has not been (lefinitely establishe(l. Eaton, McCallum, and Mlayhugh (3) showed that, under conditions of excess boron, stone fruit trees translocate boron to the fruit an(d that higlh concentrations can accumulate there -while only moderate concentrations remain in the leaves. Scott and Schrader (8) showed that the concentration of boron in older leaves of the grape plant (lecrease(l after the source in the root media hadl been removed. They On the (late designatedl for Period 1 the nutrient solution was (lumped an(l the gravel wvas flushed four timles with (listillech water and nutrient without boron then provided. At the end of each of 12 assigned intervals, the plants of a particular group were cut at the cotyledonary no(le and the fresh weight was taken. The leaves w\ere then strippedl from the stem and numbered consecuttively from the base of the plant. Leaves

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“…Outros autores observaram o efeito do cálcio na redução do teor de boro no tecido de diversas plantas (REEVE & SHIVE, 1944;JONES & SCHARSETH, 1944;BRENNAN & SHIVE,1948). Na Tabela 4, sao apresentadas as concentrações de boro na materia seca das folhas inferiores, em função das doses de zinco.…”

Section: Concentração De Borounclassified

Efeitos da aplicação de P, B, Zn e calagem no teor de boro e zinco das folhas de mudas de Eucalyptus grandis (Hill, Ex-Maiden) cultivadas em solo de cerrado

Filho

Sarruge

Haag

1979

An. Esc. Super. Agric. Luiz de Queiroz

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Foi desenvolvido em casa de vegetação, na E. S.A."Luiz de Queiroz", em Piracicaba (SP), um experimento, utilizando-se Latossol Vermelho Amarelo, fase arenosa, originalmente sob vegetação de cerrado, do município de Itirapina (SP), cujo objetivo foi estudar os efeitos de níveis de fósforo (0, 16 e 32 ppm), boro (0, 2 e 4 ppm), zinco (0, 3 e 6 ppm) e calagem (0 e 6,0 g CaCO3 + 2,5 g MgCO3) por vaso no teor de micronutrientes de folhas de Eucalyptus grandis (Hill, Ex-Maiden). O delineamento experimental utilizado foi inteiramente casualizado num esquema fatorial 3³ na presença e ausência de calagem. Cada parcela foi constituída de um vaso contendo 8,0 kg de terra e duas plantas. As adubações com boro e zinco aumentaram as concentrações desses micronutrientes nas folhas das plantas. Verificou-se acúmulo de boro nos tecidos das folhas, em níveis considerados tóxicos, quan do se adicionou ao solo 2 e 4 ppm de boro. A calagem diminuiu as concentrações de zinco das folhas das plantas.

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Potassium-Boron and Calcium-Boron Relationships in Plant Nutrition

Cited by 78 publications

References 0 publications

Distribution of Boron in Cells of Dicotyledonous Plants in Relation to Growth.

Distribution of Boron in Cells of Dicotyledonous Plants in Relation to Growth.

Translocation & re-use of boron in broccoli

Efeitos da aplicação de P, B, Zn e calagem no teor de boro e zinco das folhas de mudas de Eucalyptus grandis (Hill, Ex-Maiden) cultivadas em solo de cerrado

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