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Assessing the effects of gamma irradiation and storage time in energetic value and in major individual nutrients of chestnuts. IPB - Escola Superior Agrária
Fernandes, Ângela; Barreira, João C.M.; António, Amílcar L.; Bento, Albino; Botelho, M. Luísa; Ferreira, Isabel C.F.R..
Chestnut (Castanea sativa Miller) is an important food resource all over the world. In the present study, it is intended to evaluate if the application of gamma irradiation doses < 3 kGy maintain chestnuts chemical and nutritional profiles unaffected. Furthermore, possible interactions among irradiation dose and storage time were accessed using linear discriminate analysis (LDA). The nutritional composition was evaluated through determination of proteins, fat, ash, carbohydrates and energetic value. The chemical composition was focused in the main nutrients found in chestnuts: sugars- sucrose, fatty acids- palmitic, oleic, linoleic and linolenic acids, tocopherols- Y-tocopherol. The obtained results seem to indicate that the irradiation treatment did...
Tipo: Article Palavras-chave: Irradiated chestnuts; Gamma irradiation; Energetic value; Nutritional parameters; Linear Discriminant Analysis.
Ano: 2011 URL: http://hdl.handle.net/10198/6237
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Avaliação dos efeitos da radiação gama na conservação da qualidade da polpa de amora-preta (Rubus spp. L.). Repositório Alice
SILVA, M. P. da; GOMES, F. dos S.; FREIRE JUNIOR, M.; CABRAL, L. M. C..
2014
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Anthocyanins; Antioxidant activity; Shelf life; Gamma irradiation; Rubbus spp; Antocianinas; Atividade antioxidante; Vida útil de prateleira; Radiação gama.
Ano: 2014 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1003972
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Citrus asymmetric somatic hybrids produced via fusion of gamma-irradiated and iodoacetamide-treated protoplasts. Repositório Alice
BONA, C.M. de; GOULD, J.H.; MILLER JR.; J.C.; STELLY, D.; LOUZADA, E.S..
The objective of this study was to produce citrus somatic asymmetric hybrids by fusing gamma-irradiated protoplasts with iodoacetamide-treated protoplasts. Protoplasts were isolated from embryogenic suspension cells of grapefruit (Citrus paradisi Macfad.) cultivars Ruby Red and Flame, sweet oranges (C. sinensis Osbeck) 'Itaboraí', 'Natal', Valencia', and 'Succari', from 'Satsuma' (C. unshiu Marcow.) and 'Changsha' mandarin (C. reticulata Blanco) and 'Murcott' tangor (C. reticulata x C. sinensis). Donor protoplasts were exposed to gamma rays and receptor protoplasts were treated with 3 mmol L-1 iodoacetamide (IOA), and then they were fused for asymmetric hybridization. Asymmetric embryos were germinated, and the resulting shoots were either grafted onto...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Citrus sp.; Gamma irradiation; Grapefruit; Protoplast fusion; Somatic hybridization; Sweet orange; Irradiação gama; Pomelo; Fusão de protoplasto; Hibridação somática; Laranja doce.
Ano: 2009 URL: http://www.alice.cnptia.embrapa.br/handle/doc/125867
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Citrus asymmetric somatic hybrids produced via fusion of gamma-irradiated and iodoacetamide-treated protoplasts PAB
Bona,Claudine Maria de; Gould,Jean Howe; Miller Jr,J. Creighton; Stelly,David; Louzada,Eliezer Silva.
The objective of this study was to produce citrus somatic asymmetric hybrids by fusing gamma-irradiated protoplasts with iodoacetamide-treated protoplasts. Protoplasts were isolated from embryogenic suspension cells of grapefruit (Citrus paradisi Macfad.) cultivars Ruby Red and Flame, sweet oranges (C. sinensis Osbeck) 'Itaboraí', 'Natal', Valencia', and 'Succari', from 'Satsuma' (C. unshiu Marcow.) and 'Changsha' mandarin (C. reticulata Blanco) and 'Murcott' tangor (C. reticulata x C. sinensis). Donor protoplasts were exposed to gamma rays and receptor protoplasts were treated with 3 mmol L-1 iodoacetamide (IOA), and then they were fused for asymmetric hybridization. Asymmetric embryos were germinated, and the resulting shoots were either grafted onto...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Citrus sp.; Gamma irradiation; Grapefruit; Protoplast fusion; Somatic hybridization; Sweet orange.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2009000500004
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Comparison of methods to quantify soil microbial biomass carbon Agronomy
Moura, Rafael Thomaz de Aquino; Carrido, Marlon da Silva; Sousa, Carla da Silva; Menezes, Rômulo Simões Cezar; Sampaio, Everardo Valadares de Sá Barretto.
 Soil microorganism biomass is an important soil quality indicator. The microbial biomass of soil was determined by killing and lysing the soil microbes by fumigation with chloroform, irradiation with gamma rays, or irradiation with microwaves. Four soils with increasing carbon concentrations (5, 10, 15, and 30 g kg-1) were analyzed using four methods: the direct application of chloroform, chloroform fumigation, microwave irradiation, and gamma ray irradiation with radiation doses of 15, 25, 35, 45, and 60 KGy. The fungi and bacteria in the soil were quantified by plate counting. Microwave irradiation and gamma irradiation with doses equal to or above 25 KGy killed all the soil microorganisms, but the chloroform methods did not. The carbon liberation...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Microwave; Gamma irradiation; Fumigation; Incubation; Microbial carbon.; Biomassa microbiana do solo.
Ano: 2018 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39451
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Comparison of methods to quantify soil microbial biomass carbon Agronomy
Moura, Rafael Thomaz de Aquino; Carrido, Marlon da Silva; Sousa, Carla da Silva; Menezes, Rômulo Simões Cezar; Sampaio, Everardo Valadares de Sá Barretto.
 Soil microorganism biomass is an important soil quality indicator. The microbial biomass of soil was determined by killing and lysing the soil microbes by fumigation with chloroform, irradiation with gamma rays, or irradiation with microwaves. Four soils with increasing carbon concentrations (5, 10, 15, and 30 g kg-1) were analyzed using four methods: the direct application of chloroform, chloroform fumigation, microwave irradiation, and gamma ray irradiation with radiation doses of 15, 25, 35, 45, and 60 KGy. The fungi and bacteria in the soil were quantified by plate counting. Microwave irradiation and gamma irradiation with doses equal to or above 25 KGy killed all the soil microorganisms, but the chloroform methods did not. The carbon liberation...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Agronomia ciência do solo microwave; Gamma irradiation; Fumigation; Incubation; Microbial carbon. biomassa microbiana do solo.
Ano: 2018 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39451
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Effect of gamma irradiation on the inactivation of aflatoxin B1 and fungal flora in peanut BJM
Prado,Guilherme; Carvalho,Eliana Pinheiro de; Oliveira,Marize Silva; Madeira,Jovita Gazzinelli Cruz; Morais,Vanessa Drummond; Correa,Ricardo Ferracini; Cardoso,Valbert Nascimento; Soares,Thaís Veloso; Silva,Juliana Fonseca Moreira da; Gonçalves,Rúbia Carolina Pereira.
The effect of gamma irradiation on aflatoxin B1 levels and fungal infection were investigated in peanut samples, Tatu Vermelho cultivar. At a radiation dose of 10 KGy, growth of molds was completely inhibited. Doses of 15, 20, 25 and 30 KGy were sufficient for destruction of aflatoxin B1 by 55-74%. The results suggested that the decontamination of molds by irradiation, before production of aflatoxin B1, is the most acceptable method in the preservation of peanut.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Peanut; Gamma irradiation; Aflatoxin B1.
Ano: 2003 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822003000500047
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Effects of gamma irradiation on sugars, fatty acids and tocopherols of chestnuts (Castanea sativa Miller). IPB - Escola Superior Agrária
Barros, Lillian; António, Amílcar L.; Barreira, João C.M.; Fernandes, Ângela; Bento, Albino; Botelho, M. Luísa; Ferreira, Isabel C.F.R..
As seasonal products chestnuts have to be postharvest treated to increase their shelf-life. The most common preservation method for chestnuts is the use of chemical fumigation with methyl bromide, a toxic agent that is under strictly use under Montreal Protocol due to its adverse effects on human health and environment. Food irradiation is a possible feasible alternative to substitute the traditional quarantine chemical fumigation treatment. The main studies in chestnuts irradiation were done in an Asian variety, which is bigger and sweeter than the European types. However, on Portuguese varieties nothing has been reported. Herein, the influence of irradiation and storage time in sugars, fatty acids and tocopherols profiles/quantities in chestnuts...
Tipo: ConferenceObject Palavras-chave: Irradiated chestnuts; Gamma irradiation; Sugars; Fatty acids; Tocopherols.
Ano: 2011 URL: http://hdl.handle.net/10198/6081
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Evaluation of Gamma Irradiation Effect on the Oxidative Stress Factors in Septic Rats Treated With Iranian Plant Essential Oils BABT
Fatemi,Faezeh; Yazdi,Atefeh Jalali; Ghanooni,Shirin; Zolfaghari,Mohammad Reza.
ABSTRACT Cuminum cyminum L. (CM), Zataria multiflora Boiss. (ZM) and Mentha piperita L. (MP) are traditional medicinal plants with various pharmacological properties. This study was designed to assess the role of gamma irradiation -a modern decontamination method- in hepatoprotective effects of their essential oil (E.Os) in septic rats induced by experimental cecal ligation and puncture (CLP) model. The rats were divided into 20 groups; sham-operated (SOP); CLP; CLP + CM, ZM and MP (E.Os) (100 & 200 mg/kg b.w) and CLP + gamma irradiated (10 and 25 kGy) E.Os (100 & 200 mg/kg b.w) as treatment groups. All E.Os were injected i.p immediately after sepsis induction. 24 hour after CLP, the rats were sacrificed and the liver tissue was examined...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Essential oils; Oxidative stress; Antioxidant; CLP; Gamma irradiation.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132018000100312
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Gamma irradiation in the control of pathogenic bacteria in refrigerated ground chicken meat Scientia Agricola
Spoto,Marta Helena Filet; Gallo,Cláudio Rosa; Alcarde,André Ricardo; Gurgel,Maria Sílvia do Amaral; Blumer,Lucimara; Walder,Júlio Marcos Melges; Domarco,Rachel Elisabeth.
This work evaluated the effect of gamma radiation on reducting the population of Staphylococcus aureus, Escherichia coli and Salmonella typhimurium in ground chicken breast stored under refrigeration. The experiment included a control and 4 doses of gamma radiation (2.0, 4.0, 6.0 and 8.0 kGy) along with 5 periods of storage under refrigeration (1, 7, 14, 21 and 28 days). Samples of ground chicken breast were inoculated with Staphylococcus aureus (ATCC 14458), Escherichia coli (ATCC 11105) and Salmonella typhimurium (ATCC 0626), irradiated at temperatures between 4 and 8°C and stored under refrigeration (5°C) for 28 days. The increased radiation dose and period of storage under refrigeration caused a reduction of Staphylococcus aureus, Escherichia coli and...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gamma irradiation; Pathogenic bacteria; Chicken meat; Refrigeration.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162000000300003
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Gamma radiation in papaya harvested at three stages of maturation Scientia Agricola
Pimentel,Rodrigo Meirelles de Azevedo; Walder,Julio Marcos Melges.
Papaya is a fragile, perishable fruit, highly accepted worldwide. To keep the quality of papaya from harvest to the consumers, conservation techniques are often used; among them is the application of gamma irradiation. The objective of this work was to evaluate gamma irradiation in papayas harvested at three degrees of maturation, in order to increase shelf life. Papayas were harvested in perfect quality conditions and selected by skin coloration into three distinct degrees of maturation: maturation 0, or beginning of yellow coloration; maturation 1, yellow stripes more developed, and maturation 2, one third yellow. Half of them were irradiated with 0.75 kGy, while the other half became control treatment. They were analyzed in four periods of conservation,...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Post-harvest; Food conservation; Gamma irradiation; Tropical fruits; Shelf life.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000200004
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Influence of gamma irradiation in the antioxidant potential of chestnuts (Castanea sativa Mill.) fruits and skins. IPB - Escola Superior Agrária
António, Amílcar L.; Fernandes, Ângela; Barreira, João C.M.; Bento, Albino; Botelho, M. Luísa; Ferreira, Isabel C.F.R..
As seasonal products chestnuts have to be postharvest treated to increase their shelf-life. The most common preservation method for chestnuts is the chemical fumigation with methyl bromide, a toxic agent that is under strictly use under Montreal Protocol due to its adverse effects on human health and environment. Food irradiation is a possible feasible alternative to substitute the traditional quarantine chemical fumigation treatment. This preliminary study evaluated the influence of gamma irradiation in the antioxidant potential of chestnut fruits and skins, through several chemical and biochemical parameters. The bioactive compounds (phenolics and flavonoids) and DPPH (2,2-diphenyl-1-picrylhydrazyl) radical scavenging activity, reducing power and...
Tipo: Article Palavras-chave: Irradiated chestnuts; Gamma irradiation; Antioxidant activity; Phenolics/Flavonoids.
Ano: 2011 URL: http://hdl.handle.net/10198/6236
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Influence of gamma radiation on the antioxidant properties of edible chestnuts. IPB - Escola Superior Agrária
António, Amílcar L.; Ferreira, Isabel C.F.R.; Bento, Albino; Teubig, P.; Botelho, M. Luísa.
As seasonal products chestnut have to be postharvest treated to increase the shelf-life. Several problems are associated with traditional preservation methods. These are a decreasing in quality due to dehydration and contamination with insects and microbes including secondary metabolites, e.g.: mycotoxin. The most common preservation method for chestnuts is the use of chemical fumigation with methyl bromide. Methyl bromide is a toxic agent and has been banned according to the Montreal Protocol due to its adverse effects on human health and the environment. Following the recommendations of a scientific committee of the United Nations Environmental Program (UNEP), Methyl Bromide Technical Options Committee (MBTOC), food irradiation is a possible feasible...
Tipo: ConferenceObject Palavras-chave: Castal1ea sativa Mill.; Lrradiated chestnut; Gamma irradiation; Antioxidant activity.
Ano: 2010 URL: http://hdl.handle.net/10198/3876
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Irradiation effect on in vitro organogenesis, callus growth and plantlet development of Gerbera jamesonii Horticultura Brasileira
Hasbullah,Nor A; Taha,Rosna M; Saleh,Azani; Mahmad,Noraini.
The present work was carried out to study the effects of gamma irradiation on in vitro growth of explants, callus and the formation of shoots and plantlets. Irradiation is known to exhibit or inhibit the differentiation of cells and growth of plants in vitro, which helps in producing new plant varieties. Gamma irradiation is one of the physical mutagens that are widely used for mutation breeding. A gradual decline was observed in the number of shoots regenerated from irradiated petiole explants compared to control. Numbers of shoots regenerated from irradiated petiole explant cultured on Murashige &amp; Skoog medium supplemented with 2.0 mg L-1 BAP and 0.5 mg L-1 NAA was reduced to 6.6±0.9 from 7.5±0.4 (control) when explants were exposed to 20 Gray of...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gerbera jamesonii; Ornamental; Gamma irradiation; Explant; Callus regeneration; Plant growth regulator; MS medium.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362012000200012
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Low dose gamma-irradiation as a suitable solution for chestnut (Castanea sativa Miller) conservation: effects on sugars, fatty acids and tocopherols IPB - Escola Superior Agrária
Fernandes, Ângela; António, Amílcar L.; Barros, Lillian; Barreira, João C.M.; Bento, Albino; Botelho, M. Luísa; Ferreira, Isabel C.F.R..
Along with dehydration, the development of insects and microorganisms is the major drawback in chestnut conservation. Irradiation has been regaining interest as an alternative technology to increase food products shelf-life. In the present work, the effects of low dose gamma irradiation on sugars, fatty acids and tocopherols composition of chestnuts stored at 4 ºC for different storage periods (0, 30 and 60 days) was evaluated. The irradiations were performed in a 60Co experimental equipment, for 1 h (0.27 +/- 0.04 kGy) and 2 h (0.54 +/- 0.04 kGy). Changes in sugars and tocopherols were determined by high performance liquid chromatography (HPLC) coupled to refraction index (RI) and fluorescence detections, respectively, while changes in fatty acids were...
Tipo: Article Palavras-chave: Irradiated chestnuts; Gamma irradiation; Sugars; Fatty acids; Tocopherols.
Ano: 2011 URL: http://hdl.handle.net/10198/6228
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Microhardness and Ultrastructure of Demineralized Gamma-Irradiated Human Enamel after Diode Laser (980 nm) and Fluoride Surface Treatment BABT
Bakr,Mostafa AbdAllah; Saafan,Ali Mohamed; Maghraby,Eman Mohamed Fathy El; Rouby,Dalia Hussien El; Ahmed,Salwa Farid.
Abstract Quality of life drastically diminished after radiotherapy due to radiation induced oral complications. Fluoride was found to be helpful in decreasing the incidence of radiation caries; however it has not led to elimination of dental caries. Thus, new techniques containing low fluoride concentration or not containing fluoride at all, as laser irradiation, have been studied to prevent the beginning or progression of caries. So the purpose of this study is to investigate the effect of laser surface treatment with or without fluoride on microhardness and ultrastructure of demineralized gamma irradiated enamel; Thirty enamel slabs were allocated into three groups (n=10): G slabs were subjected to gamma irradiation only; GL slabs were subjected to gamma...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Laser; Fluoride; Gamma irradiation; Demineralization; Microhardness.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132019000100606
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Mortality of Frankliniella occidentalis (Pergande) (Thysanoptera: Thripidae) by Gamma Irradiation Agricultura Técnica
Araya,Jaime E; Curkovic,Tomislav; Zárate,Herman.
The western flower thrips, Frankliniella occidentalis (Pergande), is a good working model for studies of irradiation as a quarantine treatment on agricultural products against this insect group. A study was conducted to evaluate the mortality of this species, resulting from different dosages of gamma irradiation. Field populations were collected and exposed to 0.5, 1.0, and 1.5 kGy in a 60-Cobalt irradiator. In a first experiment, 645 adult F. occidentalis per treatment were used. Adult mortality reached 35% to 67% after 1 h exposure, significantly higher than the control. In a second experiment with the same dosages and storage at 5-6°C, evaluations were done at days 8 and 14 on at least 200 adults. Mortality increased significantly with the dosage of...
Tipo: Journal article Palavras-chave: Gamma irradiation; Quarantine treatment.
Ano: 2007 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0365-28072007000200010
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Mutagenesis in Petunia x hybrida Vilm. and isolation of a novel morphological mutant Braz. J. Plant Physiol.
Berenschot,Amanda S.; Zucchi,Maria I.; Tulmann-Neto,Augusto; Quecini,Vera.
Traditionally, mutagenesis has been used to introduce novel genetic variability in ornamental crops. More recently, it has become a powerful tool in gene discovery and functional analyses in reverse genetics approaches. The present work aimed to compare the efficiency of physical and chemical agents in generating mutant populations of petunia. We have indirectly evaluated the genomic damage by analyzing developmental characteristics of the plantlets derived from treated seeds employing gamma radiation at 0, 20, 40, 60, 80 and 100 Gy and the alkylating agent ethyl-methanesulfonate (EMS) at 0, 0.05, 0.1, 0.15, 0.2 and 0.25% (v/v). Gamma rays and EMS caused developmental defects and decreased seedling viability in plants obtained from the mutagenized seeds....
Tipo: Info:eu-repo/semantics/article Palavras-chave: EMS; Gamma irradiation; Genomic damage; Mutagenesis; Reverse genetics.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202008000200002
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Physiological Responses of Callus from Gerbera jamesonii Bolus ex. Hook f. to Gamma Irradiation BABT
Hasbullah,Nor Azlina; Taha,Rosna Mat; Saleh,Azani; Mohamed,Normadiha.
In the present study, in vitro mutagenesis techniques were applied to investigate the effects of gamma irradiation at 0, 10, 20, 30, 40, 50 and 60 Gy on physiological changes in callus of Gerbera jamesonii Bolus ex. Hook f. Biochemical changes in chlorophyll and soluble protein content of pre- and post- irradiated Gerbera callus were studied. Non-irradiated callus demonstrated the highest amount of chlorophyll content as compared to callus irradiated at 10, 20, 30, 40, 50 and 60 Gy. In addition, the amount of chlorophyll b was relatively higher than chlorophyll a in both the irradiated and non-irradiated callus, except for callus irradiated at 10 Gy. Biochemical differentiation based on total soluble protein content revealed gradual reduction after day 9...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Gerbera jamesonii; Gamma irradiation; Callus; In vitro; Chlorophyll; Soluble protein.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000300012
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Sensitivity of Jaragua grass (Hyparrhenia rufa) to gamma radiation. Repositório Alice
VALARINI, M. J.; MECELIS, N. R.; VEASEY, L. A.; ALCANTARA, P. B.; ALCANTARA, V. de B. G.; TULMAN NETO, A..
The sensitivity of seeds and axillary buas ot Jaragua grass(Hyparrhenia rufa) to gamma radiation was evaluated in greenhouse. In the seedtriial, doses from zero to l100 Gy were applied to 500 fertile seeds per dose. TheD50 at 34 days was 600 Gy. For axillary buds, five month old plants with anaverage of four tillers each were irradiated with doses of zero to 90 Gy. Tilleraverage of four tillers each were irradiated with doses of zero to 90 Gy. Tillernummber before irradiation (initial tillers) and 93 days after treatment (final tillers)were n.APA- nngpg nf Rfl rind Qfl Gv were resDonsible for the reduction of 31 and42% in the number of tillers, respectively.
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Gamma irradiation; Radiosensitivity; Capim Jaraguá; Hyparrhenia Rufa; Radiação; Raio Gama; Semente; Seeds.
Ano: 1996 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/321413
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