Absorption of Radioactive Calcium by the Peanut Fruit

Bledsoe, Roger W.; Comar, C. L.; Harris, Henry C.

doi:10.1126/science.109.2831.329

Cited by 76 publications

(27 citation statements)

References 6 publications

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“…THORNTON and BROADBENT (20) demonstrated the uptake and movement of isotopic nitrogen from the fruiting organs to the vegetative portions of the plant. Recent work with radioactive calcium by BLEDSOE, et al (3) indicates that the need of an-external supply of calcium by the developing fruit might be the result of poor translocation of that ion from the plant to the fruit.…”

Section: Plant Physiologymentioning

confidence: 99%

“…BLEDSOE, et al, (3) recently reported that when radioactive calcium was administered to the fruiting medium there was a very active absorption of Ca45 by gynophores, shells and seed of fruit as compared with the small amount of absorption by those organs when Ca45 was supplied to the root of the plant. In the latter case, the young gynophore had a relatively high concentration of Ca45 but the concentration per unit of dry weight decreased as that organ developed and the shells of fully developed green fruit contained only a small concentration of labeled calcium while never more than a trace could be detected in the seed.…”

mentioning

confidence: 99%

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The Influence of Mineral Deficiency on Vegetative Growth, Flower and Fruit Production, and Mineral Composition of the Peanut Plant

Bledsoe¹,

Harris²

1950

Plant Physiol.

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Section: Plant Physiologymentioning

confidence: 99%

mentioning

confidence: 99%

The Influence of Mineral Deficiency on Vegetative Growth, Flower and Fruit Production, and Mineral Composition of the Peanut Plant

Bledsoe¹,

Harris²

1950

Plant Physiol.

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“…Since pod initiation is influenced by Ca (Bledsoe et al 1949), the pod distribution is potentially sensitive to competition for soil Ca. Gypsum application effected the pod distribution of some varieties (ICGS(E) 21 in experiments 1 and 2, Kadiri 71-1 in Expt 1 and Robut 33-1 in Expt 2).…”

Section: The Effect Of Soil Ca On Pod Distributionmentioning

confidence: 99%

“…Ca requirements vary with stage of pod development, are greatest at the start of gynophore swelling (Bledsoe et al, 1949). Deficiencies at this stage result in failure to expand into a pod.…”

Section: Introductionmentioning

confidence: 99%

The influence of plant growth habit on calcium nutrition of groundnut (Arachis hypogaea L.) pods

Hartmond

Williams²,

Lenz

1994

Plant Soil

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In field experiments in India and Niger runner and bunch groundnut cultivars were compared for their pod distribution pattern and its relevance to the calcium (Ca) supply for pod development. Bunch cultivars produced sixty to eighty percent of their pods within 5 cm of the tap root. Runner cultivars explored a radius of up to 30 cm for pod production and exploited the soil area in a more homogeneous manner than bunch types. The available soil volume per pod was 19 to 27 cm 3 for bunch types and 43 to 46 cm 3 for runner types, varying the potential for Ca competition between pods. Computation of the soil Ca content needed to satisfy pod Ca requirements showed that much higher concentrations were needed for the bunch cultivars than for the runners. No significant differences in Ca content of pods existed between bunch and runner cultivars. However, in the runner cultivars, the Ca content of the more widely dispersed pods in outer zones was greater than that of the more densely populated inner pod zones. Regression analysis of shelling percentage across a range of environments showed that the shelling percentage of runners declined less rapidly than did the shelling percent of bunch types, indicating that runners were more efficient in exploiting Ca at lower soil Ca availability than the bunch types.

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“…Burkhart and Collins (7) were the first researchers to physically isolate the pegging and rooting zones of peanut. Later, Bledsoe et al (1) used 15-L pots to contain soil for the rooting zone, while the shoot of the plant extended through a central hole in an "asphaltum-coated metal pan into which the pegs formed. Skelton and Shear (13) grew peanut plants in 15-cm dia.…”

mentioning

confidence: 99%

A Root Tube - Pegging Pan Apparatus: Preliminary Observations and Effects of Soil Water in the Pegging Zone1

Bennett¹,

Sexton²,

Boote³

1990

Peanut Science

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Soil conditions, especially water deficits in either the pegging or rooting zone or both, affect pod initiation and seed development of peanut (Arachis hypogaea L.). The objectives of this study were to 1) construct a root tube -pegging pan apparatus which would allow forphysicalseparationofthe rootingandpeggmgzones, 2) determine growth and development of peanut when grown in the apparatus, and 3) examine the effects of soil water in the pegging zone on the initiation and development of peanut fruits. An experimental apparatus was constructed to provide a mechanism for separation of the rooting and pegging zones, allowing for independent control of soil water in both zones. Root tubes (1.6 m long and 15 cm in dia.)were constructed of polyvinyl chloride tubing. Watering access tubes were inserted at 0,0.5 and 1.0 m from the top of the root tube.The top of the root tube was closed with a convex cap having a 5-cm central hole through which a peanut plant was allowed to grow.A peggmg pan (50 cm long x 35 cm wide x 20 cm deep) was fitted around the upper portion of the root tube. Preliminary studies demonstrated satisfactov shoot growth and pod development of peanut plants grown in the apparatus provided over-watering was avoided. It also appeared that pods and seeds formed in air-dry pegging zone soil. To examine this in more detail, an experiment was conducted comparing the effects of air-dry vs. moist (7 to 12% water by weight) pegging zone soil on pod and seed formation. The air-dry pegging zone reduced the percentage of tagged pegs which developed into full pods (those having reached full expansion) from 61 to 48% and reduced the growth rate of developing seeds and pods by 18 and 298, respectively. The root tube -pegging pan apparatus provided a useful technique to gain a better understanding of peanut pod formation as influenced by soil water environments in the pegging zone.

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Absorption of Radioactive Calcium by the Peanut Fruit

Cited by 76 publications

References 6 publications

The Influence of Mineral Deficiency on Vegetative Growth, Flower and Fruit Production, and Mineral Composition of the Peanut Plant

The Influence of Mineral Deficiency on Vegetative Growth, Flower and Fruit Production, and Mineral Composition of the Peanut Plant

The influence of plant growth habit on calcium nutrition of groundnut (Arachis hypogaea L.) pods

A Root Tube - Pegging Pan Apparatus: Preliminary Observations and Effects of Soil Water in the Pegging Zone1

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