Radiation Botany最新文献_第9页

Cytokinins and mitotic inhibition in “gamma-plantlets” “γ -植物”的细胞分裂素和有丝分裂抑制

Radiation Botany Pub Date : 1974-12-01 DOI: 10.1016/S0033-7560(74)80010-4

William R. Jordan III , Alan H. Haber

引用次数: 2

Four-year post-exposure assay of vegetation surrounding project pinstripe: Demonstration of the utility of delayed damage appraisals 细条纹项目周围植被的四年暴露后分析:延迟损害评估的效用示范

Radiation Botany Pub Date : 1974-12-01 DOI: 10.1016/S0033-7560(74)80012-8

Harvey L. Ragsdale, W.A. Rhoads

{"title":"Four-year post-exposure assay of vegetation surrounding project pinstripe: Demonstration of the utility of delayed damage appraisals","authors":"Harvey L. Ragsdale, W.A. Rhoads","doi":"10.1016/S0033-7560(74)80012-8","DOIUrl":"10.1016/S0033-7560(74)80012-8","url":null,"abstract":"<div>This report illustrates the feasibility of using temporally-delayed vegetation assays to determine radiation damage, by documenting the radiation damage resulting from the accidental venting of radioactive materials during Project Pinstripe, Frenchman's Flat, Nevada Test Site, in April, 1966. Evidence of desert shrub radiation damage was first observed and photographed, in April, 1968. Systematic study of the vegetation was initiated in October, 1970, and evidence of radiation damage documented over 72·9 hectares adjacent to the vent. Beta doses were estimated at 15–21 krads based on gamma exposure dose measurements. The minimum beta dose estimate was substantially greater than the theoretical lethal dose for the shrub, Larrea divaricata. Radiation damage to the shrubs, Larrea divaricata, Ephedra funerea, and Atriplex confertifolia was expressed as differential bud mortality, partial death of shrub crowns with and without crown regrowth, and total shrub crown death without crown regrowth. Each of the shrub populations was statistically different from its control population with respect to the distribution of individuals among damage classes. Generally, damage patterns were similar to those observed at two previously-studied Plowshare events.</div>","PeriodicalId":20794,"journal":{"name":"Radiation Botany","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1974-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0033-7560(74)80012-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83150656","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: 0

In vivo labelling of nucleic acids during microsporogenesis in tomato 番茄小孢子形成过程中核酸的体内标记

Radiation Botany Pub Date : 1974-12-01 DOI: 10.1016/S0033-7560(74)80029-3

C.B. Singh

引用次数: 2

The effect of ethyl methanesulfonate treatment on floret sterility and chlorophyll mutation rate in barley 甲基磺酸乙酯处理对大麦小花不育性和叶绿素突变率的影响

Radiation Botany Pub Date : 1974-12-01 DOI: 10.1016/S0033-7560(74)80027-X

A. Arain

引用次数: 0

Effects of controlled atmosphere on irradiated lemon fruits 控制气氛对辐照柠檬果实的影响

Radiation Botany Pub Date : 1974-12-01 DOI: 10.1016/S0033-7560(74)80023-2

A. Shrikhande, Nantana Kaewubon

引用次数: 3

Effects of chronic gamma radiation on the composition of the herb community of an oak-pine forest 慢性伽马辐射对栎树松林草本植物群落组成的影响

Radiation Botany Pub Date : 1974-12-01 DOI: 10.1016/S0033-7560(74)80017-7

Edward Flaccus , Thomas V. Armentano, Marcie Archer

{"title":"Effects of chronic gamma radiation on the composition of the herb community of an oak-pine forest","authors":"Edward Flaccus , Thomas V. Armentano, Marcie Archer","doi":"10.1016/S0033-7560(74)80017-7","DOIUrl":"https://doi.org/10.1016/S0033-7560(74)80017-7","url":null,"abstract":"<div>A complete inventory of the herb populations of the inner 50 m of the Brookhaven irradiated forest was made in 1968 and 1973. The data are compared with those of earlier inventories, giving information on changes through a ten-year period in a community exposed to chronic radiation stress.Per cent cover of Carex pensyluanica, which dominates the zone 20–40 m from the source (125-25 R/day in 1973), increased rapidly at first and then more slowly through 1968, then declined somewhat by 1973. There was no shift in its distribution over ten years. Sharp increase in Rubus spp. cover in this zone contributed to the most recent Carex decline.A greater than eight-fold rise in total density of species other than Carex occurred since 1968, mostly due to a large increase in density of important species, while only those of infrequent occurrence declined or disappeared by 1973. Rate of change in herb populations was slowed by high exposures close to the source and by competition with Carex and Rubus in the sedge zone. The distribution of Rumex acetosella changed in a manner suggesting possible genetic alteration of radiosensitivity. There was a net increase of four species between 1968 and 1973.Species diversity increased with distance from the source, increased with time from 1968 to 1973 in the outer 40–50 m zone, and changed relatively slowly with time in the inner zones of higher exposure rates. The reasons for the comparatively slow rates of successional change are discussed.We predict that with future reduction in radiation stress due to source decay and with continuing expansion of Rubus spp. clones, Carex dominance will continue to decline as species diversity and herb population densities increase slowly.</div>","PeriodicalId":20794,"journal":{"name":"Radiation Botany","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1974-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0033-7560(74)80017-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91741442","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

Effects of ionizing irradiation on mushrooms as influenced by physiological and environmental conditions 生理和环境条件下电离辐照对蘑菇的影响

Radiation Botany Pub Date : 1974-12-01 DOI: 10.1016/S0033-7560(74)80020-7

J.P. Skou, K. Bech, Kirsten Lundsten

{"title":"Effects of ionizing irradiation on mushrooms as influenced by physiological and environmental conditions","authors":"J.P. Skou, K. Bech, Kirsten Lundsten","doi":"10.1016/S0033-7560(74)80020-7","DOIUrl":"https://doi.org/10.1016/S0033-7560(74)80020-7","url":null,"abstract":"<div>The effects of irradiation with β (10 MeV fast electrons)- and γ-rays were studied on several characters in strains of the cultured mushroom under different physiological and environmental conditions, including uncut and cut mushrooms, tightness of packing, and relative humidity. Weight loss was greatest in the non-irradiated mushrooms owing to evaporation from an increased surface area resulting from expansion and ripening which were greatly retarded in the irradiated samples. Twenty-five krads of β- or γ-rays had a significant, but transitory, effect on the veil opening. The inhibition became long-lasting and improved with increasing dose. High relative humidity and free exchange of gases were essential for maintaining quality. Depending on the conditions, expansion of pilei and opening of veils were affected differently by irradiation with β- and γ-rays. The strains displayed different opening rates. Expansion and elongation were retarded significantly by 100 krads. The effect improved further with increasing dose. Irradiation improved the skin colour when the mushrooms were stored uncovered or in boxes with perforated PVC-foil. The opposite was the case when the boxes were sealed. The colour of the flesh was examined by measuring its reflectance. Edaphic factors or age of the culture (flush-number) influenced the slope of the reflectance curves. Generally, irradiation increased flesh discoloration, but more in the stipes than in pilei. This adverse effect would make acceptance of irradiated mushrooms by consumers questionable.The flesh of the pilei was almost unaffected by the packing, while packing gave a positive response on the stipes. Surface mould fluff was reduced by 50 krads of β- or γ-rays and almost extinct after 200-krad treatment. Growth of pathogens such as Pseudomonas tolaasii and Mycogone pemiciosa was prevented by 200 krads.</div>","PeriodicalId":20794,"journal":{"name":"Radiation Botany","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1974-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0033-7560(74)80020-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91741445","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: 12

Effect of simulated dew on fallout retention and beta radiation damage to a bean crop 模拟露珠对豆荚作物沉降物滞留和辐射危害的影响

Radiation Botany Pub Date : 1974-12-01 DOI: 10.1016/S0033-7560(74)80018-9

R.K. Schulz, J. Ulrich, K.L. Babcock

引用次数: 0

Accelerated and increased development of inflorescences in tomato plants from irradiated seeds 辐照后番茄植株花序的加速和增加

Radiation Botany Pub Date : 1974-12-01 DOI: 10.1016/S0033-7560(74)80016-5

R. S. Kahan

引用次数: 4

Genetic control of photomorphogenesis. Isolation of nonfilamentous mutants after gamma irradiation of Pteridium aquilinum spores 光形态发生的遗传控制。射线照射后凤蝶孢子非丝状突变体的分离

Radiation Botany Pub Date : 1974-12-01 DOI: 10.1016/S0033-7560(74)80019-0

G. P. Howland, E. L. Boyd

引用次数: 3