Translocation and Distribution of Radioactive Phosphorus in Wheat

Frazier, John C.; Schaff, J. F.; Hein, R. E.; McFarland, Robert H.

doi:10.1086/335934

Cited by 11 publications

(4 citation statements)

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“…It is possible therefore that the observed increase of phytin-P in grains of cereals grown in pots or in nutrient solutions (Michael 1939;Asada et al 1969) may arise from P absorbed during grain development and transported directly from the roots to the grains. This suggestion is supported by results of Frazier et al (1956) who found that labelled phosphate applied during grain development is indeed transported very quickly to the grains and predominantly accumulated in the distributing pathway and in grain parts (e. g. the embryo) especially rich in phytin.…”

Section: Resultssupporting

confidence: 65%

Effect of phosphate application on phytin‐phosphorus and other phosphate fractions in developing wheat grains

Michael

Zink

Lantzsch

1980

J Plant Nutrition & Soil

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Developing grains were harvested from wheat plants grown in pots which had received additional late P‐fertilizer applications. By sequential extraction of milled grain samples of different developmental stages total P (Ptot) and the P‐fractions lipid‐P (Plip), phytin‐P (Pphy), inorganic and soluble ester‐P (Pi+e) and residual‐P (Pres) were determined.‐Due to the late P‐application, grain yield, Ptot, and Pphy content of ripe grains were increased by 14%, 58%, and 80% respectively, compared to the control. 93 % of the P which accumulated additionally in the grains as a result of the late P‐application, were found to be Pphy.‐During grain development the amounts of Ptot and Pphy per 1000 kernels increased steeply whereas those of Plip and Pres were not significantly affected by the stage of grain development or by the rate of P‐application. Pi+e increased during the first stages of grain development but subsequently decreased towards nearly the same low level regardless of the treatment.‐The increased phytin concentration in the ripe grains resulted in a decreased zinc bioavailability as was indicated by feeding experiments with growing male rats.

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Section: Resultssupporting

confidence: 65%

Effect of phosphate application on phytin‐phosphorus and other phosphate fractions in developing wheat grains

Michael

Zink

Lantzsch

1980

J Plant Nutrition & Soil

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“…Symplastic transport of water and solutes across these cells becomes impossible (see also Frazier et al 1956) and the maturing phase sets in with a resultant drop in fresh weight (Jennings and Morton I963a).…”

Section: (D) Functional Significance Of the Developing Pigment Strandmentioning

confidence: 99%

“…Much attention has also been paid to the movement of water and nutrients into the grain (Brown 1907;Braun 1924), the transport of phosphorus (Frazier et al 1956) and sulphur (Seidman and Frazier 1962), and the accumulation of radioactive fall-out material within the grain (Rasmusson, Smith, and Myers 1963;Craker and Smith 1969); but no attempt was made by any of those investigators to correlate their physiological observations with the morphology of the plant in any great detail. Recently, Morton (1963a, 1963b) have published a series of papers on the physiology and biochemistry of the developing wheat grain.…”

Section: Introductionmentioning

confidence: 99%

Studies on the Ontogeny of the Pigment Strand in the Caryopsis of Wheat

Zee¹,

O’Brien²

1970

Aust. Jnl. Of Bio. Sci.

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SummaryThe grain of wheat has a groove that extends inward nearly to the centre of the grain. At the base of this crease and extending through its length there is a strand of coloured tissue, the pigment strand. At about 3 days after anthesis the cells of this strand of tissue are similar to meristematic cells, possessing thin walls and the usual complement of organelles. At about 9 days after anthesis the cell walls thicken and lignify. The vacuoles of the lignified cells then begin to accumulate numerous refractile and birefringent granules which stain strongly with the sudan dyes. At about the same time an electron· dense layer of adcrusting substance begins to form and accumulate, initially near that part of the wall which is not traversed by the plasmodesmata.Later, it spreads out towards the cell lumen and plasmodesmata and becomes electron-lucent.The staining reactions of the adcrusting substance suggest that it is suberized, but its origin is not clear. At the final stages of development, the cell contents of the pigment strand become disorganized and crushed. The functional significance of the pigment strand in relation to grain development and maturation is discussed.

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“…Three sets of lõ0 plants each (I, II, and III) were growi1 hydroponically after the method of Frazier et al 8, but without supplemental lighting. As it was necessary to introduce sufficient radiosulIur into the nutrient solutions to provide radioactivity for counting without damaging the plant, it was decided that the boot stage would be the most appropriate since radioactivity would be in the living plant for only about a month, yet would be introduced before kernel formation.…”

Section: Methodsmentioning

confidence: 99%