Radiation Botany最新文献

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Oxygen enhancement ratios (OERS) for somatic mutations in tradescantia stamen hairs 紫檀雄蕊毛体细胞突变的增氧率(OERS)
Radiation Botany Pub Date : 1975-06-01 DOI: 10.1016/S0033-7560(75)80004-4
A.G. Underbrink , A.H. Sparrow , Diane Sautkulis , R.E. Mills
{"title":"Oxygen enhancement ratios (OERS) for somatic mutations in tradescantia stamen hairs","authors":"A.G. Underbrink ,&nbsp;A.H. Sparrow ,&nbsp;Diane Sautkulis ,&nbsp;R.E. Mills","doi":"10.1016/S0033-7560(75)80004-4","DOIUrl":"https://doi.org/10.1016/S0033-7560(75)80004-4","url":null,"abstract":"<div><p>Oxygen enhancement ratios (OERs) were determined for pink mutations in stamen hairs of <em>Tradescantia</em> clone 02. These were determined for X-rays (OER of 3·2) and neutrons at six energies ranging from 0·395 to 13·4-MeV (OERs ranging from 1·32 to 1·68). Unlike RBE, OER values showed only a slight dependence on neutron energy and were not found to vary as a function of dose. Our results appear consistent with OERs generally reported from other systems, but at certain energies do not agree with results previously reported for <em>Tradescantia</em>.</p></div>","PeriodicalId":20794,"journal":{"name":"Radiation Botany","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1975-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0033-7560(75)80004-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72255667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 19
Practical merit of delayed selection after single and recurrent mutagenic treatments—II. Optimum generation for selection 单次和反复诱变治疗后延迟选择的实用价值——ⅱ。最优世代选择
Radiation Botany Pub Date : 1975-06-01 DOI: 10.1016/S0033-7560(75)80005-6
K. Yonezawa, H. Yamagata
{"title":"Practical merit of delayed selection after single and recurrent mutagenic treatments—II. Optimum generation for selection","authors":"K. Yonezawa, H. Yamagata","doi":"10.1016/S0033-7560(75)80005-6","DOIUrl":"https://doi.org/10.1016/S0033-7560(75)80005-6","url":null,"abstract":"","PeriodicalId":20794,"journal":{"name":"Radiation Botany","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1975-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72882747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
The effect of ionizing radiation on ribosomal RNA synthesis in grand rapids lettuce seeds 电离辐射对大急流莴苣种子核糖体RNA合成的影响
Radiation Botany Pub Date : 1975-06-01 DOI: 10.1016/S0033-7560(75)80003-2
Lynn P. Yealy, B.P. Stone
{"title":"The effect of ionizing radiation on ribosomal RNA synthesis in grand rapids lettuce seeds","authors":"Lynn P. Yealy,&nbsp;B.P. Stone","doi":"10.1016/S0033-7560(75)80003-2","DOIUrl":"10.1016/S0033-7560(75)80003-2","url":null,"abstract":"<div><p>Germination of Grand Rapids lettuce seeds was effectively delayed by exposure to 100 kiloroentgens (kr) gamma-irradiation. Both gibberellic acid and kinetin were able to slightly overcome this delay in germination imposed by ionizing radiation. Incubation in 5-fluorouracil significantly depressed germination in irradiated seeds while it did not affect unirradiated seeds.</p><p>A dose of 100 kr ionizing radiation was effective in decreasing incorporation of [<sup>3</sup>H]-uridine into high molecular weight RNA but did not decrease incorporation into transfer RNA. 5-Fluorouracil reduced incorporation of labeled precursor into both RNA components while gibberellic acid stimulated the synthesis of ribosomal and transfer RNA.</p><p>The results indicated that ribosomal RNA synthesis was not necessary for germination to occur as 5-fluorouracil did not prevent germination in unirradiated seeds. However, 5-florouracil did delay germination after exposure to ionizing radiation indicating that ribosomal RNA synthesis may be involved in radiation damage and subsequent repair processes. From these data it appeared that ionizing radiation delayed germination of Grand Rapids lettuce seeds through an inhibition of ribosomal RNA synthesis.</p></div>","PeriodicalId":20794,"journal":{"name":"Radiation Botany","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1975-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0033-7560(75)80003-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90017978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Radiation-heat synergism for inactivation of gonidia of Aspergillus flaws 辐射热协同灭活曲霉菌原体
Radiation Botany Pub Date : 1975-06-01 DOI: 10.1016/S0033-7560(75)80006-8
Mirza Mohyuddin , W.P. Skoropad
{"title":"Radiation-heat synergism for inactivation of gonidia of Aspergillus flaws","authors":"Mirza Mohyuddin ,&nbsp;W.P. Skoropad","doi":"10.1016/S0033-7560(75)80006-8","DOIUrl":"https://doi.org/10.1016/S0033-7560(75)80006-8","url":null,"abstract":"<div><p>Interaction of heat and radiation treatments on the survival of conidia of <em>Aspergillus flavus</em> was studied, using five different temperatures, ranging from 35 °C to 55 °C, and five different doses, ranging from 25 to 125 Krad. In most combinations these treatments showed a synergistic rather than simply an additive lethal effect. The extent of synergism depended considerably on the sequence in which these treatments were applied. Heating at 45 °C, 50 °C or 55 °C followed immediately by irradiation was the most effective synergistic combination for the inactivation of conidia.</p></div>","PeriodicalId":20794,"journal":{"name":"Radiation Botany","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1975-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0033-7560(75)80006-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72255666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 24
Induction of phenylalanine ammonia lyase (PAL) in gamma irradiated potatoes 辐照马铃薯苯丙氨酸解氨酶(PAL)的诱导作用
Radiation Botany Pub Date : 1975-06-01 DOI: 10.1016/S0033-7560(75)80007-X
M.B. Pendharkar, P.M. Nair
{"title":"Induction of phenylalanine ammonia lyase (PAL) in gamma irradiated potatoes","authors":"M.B. Pendharkar,&nbsp;P.M. Nair","doi":"10.1016/S0033-7560(75)80007-X","DOIUrl":"10.1016/S0033-7560(75)80007-X","url":null,"abstract":"<div><p>The exposure of potatoes to gamma rays (10 krad) caused on induction of phenylalanine ammonia lyase (PAL) in the tubers. The induced activity was localized essentially in cortex tissue, mainly concentrated around the bud region. Whereas in parenchymatous tissue no induction was observed. The enhancement in PAL activity in buds was observed to be dependent on dose of irradiation and the duration of storage thereafter. The tubers exposed to a 10 krad dose showed maximal activation on storage at ambient conditions with 20 fold activity observed within three hours after irradiation. On further storage the activity declined and reached a constant level within a period of one week.</p><p>The increase in PAL activity was partly due to activation of the inactive form of the enzyme (30–40%) and partly due to <em>de nova</em> synthesis of the protein (60–70%).</p></div>","PeriodicalId":20794,"journal":{"name":"Radiation Botany","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1975-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0033-7560(75)80007-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74231388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 30
Radiation-heat synergism for inactivation of gonidia of 辐射-热协同作用对植物生殖腺失活的影响
Radiation Botany Pub Date : 1975-06-01 DOI: 10.1016/S0033-7560(75)80006-8
M. Mohyuddin, W. P. Skoropad
{"title":"Radiation-heat synergism for inactivation of gonidia of","authors":"M. Mohyuddin, W. P. Skoropad","doi":"10.1016/S0033-7560(75)80006-8","DOIUrl":"https://doi.org/10.1016/S0033-7560(75)80006-8","url":null,"abstract":"","PeriodicalId":20794,"journal":{"name":"Radiation Botany","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1975-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77642671","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 24
Practical merit of delayed selection after single and recurrent mutagenic treatments—II. Optimum generation for selection 单次和反复诱变处理后延迟选择的实用价值——Ⅱ。选择的最佳生成
Radiation Botany Pub Date : 1975-06-01 DOI: 10.1016/S0033-7560(75)80005-6
K. Yonezawa, H. Yamagata
{"title":"Practical merit of delayed selection after single and recurrent mutagenic treatments—II. Optimum generation for selection","authors":"K. Yonezawa,&nbsp;H. Yamagata","doi":"10.1016/S0033-7560(75)80005-6","DOIUrl":"https://doi.org/10.1016/S0033-7560(75)80005-6","url":null,"abstract":"<div><p>Criteria for predicting optimum selection procedure in mutation breeding of self-pollinating crops were discussed and formulated. Based on the mathematical formulae and some numerical computations, the efficiency of delayed selections was examined and the following derived as a general conclusion.</p><p>Delayed selection in M<sub>3</sub>~M<sub>5</sub> generations is of great practical merit when plants mutated at multiple loci are to be obtained. This method is considered promising even for the detection of single-locus mutants when difficulty in discrimination of the objective mutants is large, and/or when permissible population size per generation is small, probably below 10,000, as a rough estimate. It is, in general, thought that fifteen or more M<sub>2</sub> plants should be derived per M<sub>1</sub> spike or panicle. Small progeny size per M<sub>1</sub> spike such as one, two or three as proposed by Y<span>oshida</span> <em>et al</em>. seems of limited utility.</p></div>","PeriodicalId":20794,"journal":{"name":"Radiation Botany","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1975-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0033-7560(75)80005-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72255668","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Oxygen enhancement ratios (OERS) for somatic mutations in tradescantia stamen hairs 氧增强比(OERS)对褐花雄蕊毛体突变的影响
Radiation Botany Pub Date : 1975-06-01 DOI: 10.1016/S0033-7560(75)80004-4
A. G. Underbrink, A. Sparrow, D. Sautkulis, R. Mills
{"title":"Oxygen enhancement ratios (OERS) for somatic mutations in tradescantia stamen hairs","authors":"A. G. Underbrink, A. Sparrow, D. Sautkulis, R. Mills","doi":"10.1016/S0033-7560(75)80004-4","DOIUrl":"https://doi.org/10.1016/S0033-7560(75)80004-4","url":null,"abstract":"","PeriodicalId":20794,"journal":{"name":"Radiation Botany","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1975-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80517449","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 19
Radiation-induced chromosomal aberrations in the plant Tradescantia: Dose-response curves I. Preliminary considerations 辐射诱导的植物Tradescantia染色体畸变:剂量-响应曲线
Radiation Botany Pub Date : 1975-06-01 DOI: 10.1016/S0033-7560(75)80001-9
John R.K. Savage
{"title":"Radiation-induced chromosomal aberrations in the plant Tradescantia: Dose-response curves I. Preliminary considerations","authors":"John R.K. Savage","doi":"10.1016/S0033-7560(75)80001-9","DOIUrl":"10.1016/S0033-7560(75)80001-9","url":null,"abstract":"","PeriodicalId":20794,"journal":{"name":"Radiation Botany","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1975-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0033-7560(75)80001-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72585104","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 64
The effect of chronic gamma irradiation on decay of oak (Quercus pubescens Willd) and dogwood (Cornus mas L.) leaves and subjacent litter 长期γ射线照射对栎、山茱萸叶片及下层枯枝落叶腐朽的影响
Radiation Botany Pub Date : 1975-06-01 DOI: 10.1016/S0033-7560(75)80002-0
A. Saas, P. Bovard, A. Grauby
{"title":"The effect of chronic gamma irradiation on decay of oak (Quercus pubescens Willd) and dogwood (Cornus mas L.) leaves and subjacent litter","authors":"A. Saas,&nbsp;P. Bovard,&nbsp;A. Grauby","doi":"10.1016/S0033-7560(75)80002-0","DOIUrl":"https://doi.org/10.1016/S0033-7560(75)80002-0","url":null,"abstract":"<div><p>Experiments showed that ionizing radiation increased decay of leaves and caused greater release of organic compounds (9–20 per cent, depending on the species, relative to carbon content) and mineral elements (20–50 per cent depending on the species and the element considered). The irradiated samples also showed substantial lowering of water storage capacity, variation in the free radicals (in particular phenolics and carbonylics) and in the release of organic compounds.</p><p>The effect on the soil surface horizons was an enhancement of leaching of organic and mineral compounds (fulvic acid and accelerated manganese and zinc). Humus loss was 8–10 per cent per annum in the surface horizon and 3–5 per cent in the subjacent horizon.</p></div>","PeriodicalId":20794,"journal":{"name":"Radiation Botany","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1975-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0033-7560(75)80002-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72255665","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
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