The effects of acute and chronic gamma irradiation on Lupinus albus L.—I. Effects of acute irradiation on the vegetative shoot apex and general morphology

Cordero, Robert E.; Gunckel, James E.

doi:10.1016/0098-8472(82)90013-2

Cited by 7 publications

(3 citation statements)

References 85 publications

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“…Plants exposed to 20 Gy were not delayed in growth when compared to that of control plants. A delay of plant growth was described by Cordero and Gunckel (1982) for leaves in a study of the plastochron index (the relationship of leaf length with age) of Lupinus albus L. The plastochron index was described as the developmental age of a particular plant by correlating leaf length with age. Repair mechanisms are suggested because the plastochron index for plants measured immediately after irradiation was increased, but was indistinguishable from the controls 11 days after exposure.…”

Section: Discussionmentioning

confidence: 99%

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Effects of an acute dose of gamma radiation exposure on stem diameter growth, carbon gain, and biomass partitioning in Helianthus annuus

Thiede¹

1988

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Effects of an Acute Dose of Gamma Radiation Exposure on Stem Diameter Growth, Carbon Gain, and _BiomassPartitioning in Helianthus annuus by Michael E. Thiede Chairperson of the Supervisory Committee: Professor Joseph P. Geraci Radiological Sciences GroupNineteen-day-old dwarf sunflower plants (Helianthus annuus, variety NK894) received a variable dose (0-40 Gy) from a cobalt-60 gamma source. A very sensitive stem monitoring device, deve!oped at Battelle's Pacific NorJawest Laboratories, Richland, Washington was used to measure real-time changes in stem diameter. Exposure of plants caused a significant reduction in stem growth and root biomass. Doses as low as 5 Gy resulted in a significant increase in leaf density, suggesting that nonreversible morphological growth changes could be induced by very low doses of radiation. Carbohydrate analysis of 40-Gy irradiated plants deu,onstrated significantly more starch content in leaves and significantly less starch content in stems 18 days after exposure than did co_:trolplants. In contrast, the carbohydrate content in roots of • ,, 40-Gv irradiated plants were not significantly different from unirradiated plants 18 days after exposure. These results indicate that radiation either decreased phloem transport or reduced the " availability of sugar reducing enzymes in irradiated plants.

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Section: Discussionmentioning

confidence: 99%

“…Cellular damage is another effect that has been observed when plants are irradiated. Meristems of Lupinus albus L. showed tunica-corpus damage at dosages at a threshold dose of 85 Gy (Cordero and Gunckel, 1982). In their study, vacuolation seen at 66 Gy w,_sthe earliest and most obvious radiation response.…”

Section: Introductionmentioning

confidence: 88%

Effects of an acute dose of gamma radiation exposure on stem diameter growth, carbon gain, and biomass partitioning in Helianthus annuus

Thiede¹

1988

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“…(ii) Suppression de certains primordia foliaires par suite de dommages touchant l'assise 11 de la tunica (Cordero et Gunckel 1982) -Chez Gerbera, ce type d'action inhibitrice peut &tre exercC uniquement au niveau du mCristkme de la tigelle initiale et des bourgeons axillaires, en place au moment du traitement. Les tigelles potentiellement nCoformCes 5 partir du cal ne peuvent &tre touchCes par ce type d'inhibition.…”

Section: Callogentse Chez Les Explants Diploides Et Haploi'des Soumisunclassified

Effets de rayons γ ⁶⁰Co sur des vitroplants haploïdes et diploïdes de Gerbera jamesonii

Dubuc-Lebreux¹,

Vieth²

1987

Can. J. Bot.

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Gerbera jamesonii ‘Super Gerbera’ explants were irradiated in vitro with 60Co γ-rays (8–100 Gy). Some received a single dose, while others received two or three at successive multiplication cycles. Several parameters were measured after 6 weeks of in vitro culture, to compare the effects of irradiation on haploid and diploid clones. Productivity is linked to the ploidy level, whereas total growth is not. Total growth inhibition is proportionate to the given dose. Callus and plantlet growth are either inhibited or stimulated, depending on the type of treatment. Callus growth is stimulated by low doses, which induce the transformation of apices into calli; treatment of successive cycles with low doses (20 and 30 Gy for diploids, 10 and 15 Gy for haploids) ensures better plantlet development. High doses inhibited growth of calli and plantlets up to the 50% level. Variations in morphology and in chlorophyll and anthocyanin content were observed among haploid and diploid irradiated explants. Plantlet production is a good criterion for an overall evaluation. Optimal dosage to ensure 50% growth and multiplication rates is estimated at 26 Gy for diploid clones and 16 Gy for haploid clones.

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The effect of gamma irradiation on growth characteristics and arbutin content of bearberry (Arctostaphylos uva-ursi, cv. arbuta)

Sovová

Opatrná²,

Jahodár

1994

Biologia plant.

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Between 1986 and 1989 we studied the influence of T-irradiation (2.5 -80 Gy) on growth processes and the content of arbutin glycoside. Bearberry [Arctostaphylos uva-ursi (L.) Sprengel] shows polycyclic characteristics of growth; the vegetation period is divided by summer dormancy (June) into periods of spring and summer growth. As plants age the summer dormancy gets longer and the period of summer growth is shorter. Irradiation with a dose of 80 Gy was lethal and a dose of 60 Gy damaged plants so much that they were not able to grow in the first spring after irradiation. Significant growth stimulation (both in the height of plants and in branching) was shown only in the second year after irradiation (2.5 -60 Gy). In the fourth year the growth in all irradiated variants was weaker than in the control. Doses of 2.5 and 5 Gy did not influence the content of arbutin significantly; higher doses of irradiation changed the dynamics of production and decomposition which is connected with growth changes.

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The effects of acute and chronic gamma irradiation on Lupinus albus L.—I. Effects of acute irradiation on the vegetative shoot apex and general morphology

Cited by 7 publications

References 85 publications

Effects of an acute dose of gamma radiation exposure on stem diameter growth, carbon gain, and biomass partitioning in Helianthus annuus

Effects of an acute dose of gamma radiation exposure on stem diameter growth, carbon gain, and biomass partitioning in Helianthus annuus

Effets de rayons γ ⁶⁰Co sur des vitroplants haploïdes et diploïdes de Gerbera jamesonii

The effect of gamma irradiation on growth characteristics and arbutin content of bearberry (Arctostaphylos uva-ursi, cv. arbuta)

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The effects of acute and chronic gamma irradiation on Lupinus albus L.—I. Effects of acute irradiation on the vegetative shoot apex and general morphology

Cited by 7 publications

References 85 publications

Effects of an acute dose of gamma radiation exposure on stem diameter growth, carbon gain, and biomass partitioning in Helianthus annuus

Effects of an acute dose of gamma radiation exposure on stem diameter growth, carbon gain, and biomass partitioning in Helianthus annuus

Effets de rayons γ 60Co sur des vitroplants haploïdes et diploïdes de Gerbera jamesonii

The effect of gamma irradiation on growth characteristics and arbutin content of bearberry (Arctostaphylos uva-ursi, cv. arbuta)

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Product

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Effets de rayons γ ⁶⁰Co sur des vitroplants haploïdes et diploïdes de Gerbera jamesonii