Radiation Botany最新文献

Radiation-induced organogenesis : effects of irradiated medium and its components on tobacco tissue culture 辐射诱导器官发生:辐照培养基及其组分对烟草组织培养的影响

Radiation Botany Pub Date : 1975-12-01 DOI: 10.1016/0033-7560(75)90007-1

N. Degani

引用次数: 6

Advances in radiation biology 辐射生物学进展

Radiation Botany Pub Date : 1975-12-01 DOI: 10.1016/0033-7560(75)90020-4

W.R. Inch

引用次数: 23

Health protection of radiation workers 辐射工作人员的健康保护

Radiation Botany Pub Date : 1975-12-01 DOI: 10.1016/0033-7560(75)90023-X

John W. Baum (Associate Head)

引用次数: 0

Biological effects of radiation 辐射的生物效应

Radiation Botany Pub Date : 1975-12-01 DOI: 10.1016/0033-7560(75)90022-8

H. John Burki

引用次数: 0

Effect of combined x-ray and diethyl sulphate treatments on mutation frequencies in rice (Oryza sativa L.) x射线与硫酸二乙酯复合处理对水稻突变频率的影响

Radiation Botany Pub Date : 1975-12-01 DOI: 10.1016/0033-7560(75)90015-0

S.N. Chakrabarti

引用次数: 7

Effect of EI-treatment in relation to physiological and biochemical traits in rice: delay in germination and its recovery with provision of glucose ei处理对水稻生理生化性状的影响:在葡萄糖供应下延迟发芽和恢复发芽

Radiation Botany Pub Date : 1975-12-01 DOI: 10.1016/0033-7560(75)90012-5

M. Inoue, H. Hasegawa, S. Hori

{"title":"Effect of EI-treatment in relation to physiological and biochemical traits in rice: delay in germination and its recovery with provision of glucose","authors":"M. Inoue, H. Hasegawa, S. Hori","doi":"10.1016/0033-7560(75)90012-5","DOIUrl":"10.1016/0033-7560(75)90012-5","url":null,"abstract":"<div>Rice seeds treated with 0·2–1·2 v/v % of ethyleneimine (EI) demonstrated increasingly delayed germination concomitant with increasing dose. At the time of germination, the release of storage products was slightly inhibited at lower doses and completely reduced at higher doses. With increasing time after germination the development of shoot length, content of reducing sugar and free amino acid, and synthesis of nucleic acid and protein in treated seeds, showed the same response pattern as the control, although at reduced levels in the treated seeds. Consequently, it is interpreted that the delay of germination is due to physiological dormancy, i.e. impaired release of dormancy which would normally yield active forms of enzymes.When treated seeds were cultured in [14C]-glucose medium, the specific activity of [14C]-glucose was higher in late-germinating seeds than in early-germinating seeds. Furthermore, the provision of glucose prevented the delay of germination, resulting in about a 10% increase in germination rate (survival rate), and yet had no effect on subsequent growth.Finally, it is concluded that the damage resulting in delayed germination and reduction of survival differs from the damage leading to inhibition of subsequent growth in that the former can be compensated for by provision of glucose while the latter cannot.</div>","PeriodicalId":20794,"journal":{"name":"Radiation Botany","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1975-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0033-7560(75)90012-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89756567","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

Physiological and biochemical changes in γ-irradiated rice γ辐照水稻的生理生化变化

Radiation Botany Pub Date : 1975-12-01 DOI: 10.1016/0033-7560(75)90011-3

M. Inoue, H. Hasegawa, S. Hori

{"title":"Physiological and biochemical changes in γ-irradiated rice","authors":"M. Inoue, H. Hasegawa, S. Hori","doi":"10.1016/0033-7560(75)90011-3","DOIUrl":"10.1016/0033-7560(75)90011-3","url":null,"abstract":"<div>Metabolic disturbances resulting in growth retardation and death of rice irradiated with 60Co γ-rays at 10 to 40 kR dose levels were investigated. Seedling growth, release of storage products (reducing sugar and free amino acids) and incorporation of radioisotopic substances ([3H]-uridine, [3h]-thymidine and [3h]-leucine) remained almost uninhibited at doses up to 20 kR but were much reduced at 40 kR. Following the 40 kR treatment, shoot elongation was terminated at the 5th day of germination, corresponding to an interruption in the release of reducing sugar. Furthermore, the onset of active increase in [3h]-thymidine incorporation after germination was also delayed in the 40 kR irradiated samples.When the seeds had been cultured in glucose-medium immediately after irradiation there were significant regular increases of survival and a disappearance in the delay in [3h]-thymidine incorporation. However, glucose had no marked effect on subsequent growth and overall metabolic damage even though incorporation of [14C]-glucose was slightly higher in the irradiated than in the control in the early stage of germination.It is suggested that the recovery from radiation damage in the early stages of germination can be enhanced by the provision of glucose while recovery from damage leading to reduction of subsequent growth is less sensitive to glucose.</div>","PeriodicalId":20794,"journal":{"name":"Radiation Botany","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1975-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0033-7560(75)90011-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80396362","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

Effects of gamma radiation on the dormant seed of Avena fatua L. 伽玛辐射对芦笋休眠种子的影响。

Radiation Botany Pub Date : 1975-12-01 DOI: 10.1016/0033-7560(75)90018-6

N. Maherchandani

引用次数: 23

Soil nutrient content of old-field and agricultural ecosystems exposed to chronic gamma irradiation 长期辐照下老田和农业生态系统土壤养分含量

Radiation Botany Pub Date : 1975-12-01 DOI: 10.1016/0033-7560(75)90004-6

T.V. Armentano , B.R. Holt , P.J. Bottino

引用次数: 2

Recherches recentes sur l'irradiation d'un Riz Francais de camargue 法国卡马尔格水稻辐照的最新研究

Radiation Botany Pub Date : 1975-12-01 DOI: 10.1016/0033-7560(75)90006-X

Jacqueline Bayonove, J.N. Marien, D. Ravelomanana, A. Soler, R. Jonard, R. Marie, P. Pereau Leroy

{"title":"Recherches recentes sur l'irradiation d'un Riz Francais de camargue","authors":"Jacqueline Bayonove, J.N. Marien, D. Ravelomanana, A. Soler, R. Jonard, R. Marie, P. Pereau Leroy","doi":"10.1016/0033-7560(75)90006-X","DOIUrl":"10.1016/0033-7560(75)90006-X","url":null,"abstract":"<div>This paper summarizes experiments carried out in the south of France to define some radiobiological characteristics of a certain variety of rice seeds in the Camargue: Oryza sativa L. c. v. Cigalon Marie, and to test treatments which provide radioprotection or promote recovery. Radio-induced damage is measured by means of the sum of seedling heights, this criterion being sometimes specified by the examination of its two components: the average height of the seedlings and the number of survivors.The results show that if high exposures to 60Co γ-rays are used then seeds must be used with a water content of not less than 13% and sowing must take place as soon as possible after exposure to minimize storage effect.A natural result of protection appears after soaking seeds at a low temperature (5°C) then dehydrating them at 32°C to bring back their initial moisture content, before irradiation. This effect is maximum when the time sequence of the treatment allows a complete hydration of the seeds. It is not due to the elimination of a radiosensitizer through soaking but might be ascribed to modifications in enzymatic protein structure during soaking at a low temperature. On the contrary, soaking at a high temperature (32°C) results in an increased radio-sensitivity.It is possible to induce recovery after irradiation if irradiated seeds are grown on a medium containing commercial yeast extract. The earlier and longer the application, the better the recovery. Extracts prepared from yeast cell culture, as well as RNA extracted from them, promote a recovery effect. All these extracts which stimulate growth of rice seedlings during their exponential stage in the laboratory and increase the number of surviving plants in the field, might contain a recovery-promoting constituent whose chemical composition is still to be found.</div>","PeriodicalId":20794,"journal":{"name":"Radiation Botany","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"1975-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0033-7560(75)90006-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91267407","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