Radiation BotanyPub Date : 1974-12-01DOI: 10.1016/S0033-7560(74)80030-X
J. G. Little
{"title":"Book reviewSelected Papers in Biochemistry. Vol. 4. Radiation Biology of Microorganisms, Kenshi Suzuki (Ed.), University Park Press, Waltham, Mass. (1971), p. 312","authors":"J. G. Little","doi":"10.1016/S0033-7560(74)80030-X","DOIUrl":"https://doi.org/10.1016/S0033-7560(74)80030-X","url":null,"abstract":"","PeriodicalId":20794,"journal":{"name":"Radiation Botany","volume":"8 1","pages":"359"},"PeriodicalIF":0.0,"publicationDate":"1974-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81693299","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}
Radiation BotanyPub Date : 1974-12-01DOI: 10.1016/S0033-7560(74)80019-0
Gary P. Howland, Emmitt L. Boyd
{"title":"Genetic control of photomorphogenesis. Isolation of nonfilamentous mutants after gamma irradiation of Pteridium aquilinum spores","authors":"Gary P. Howland, Emmitt L. Boyd","doi":"10.1016/S0033-7560(74)80019-0","DOIUrl":"https://doi.org/10.1016/S0033-7560(74)80019-0","url":null,"abstract":"<div><p>Photomorphogenetic mutants of <em>Pteridium aquilinum</em> gametophytes have been isolated after exposure to gamma-rays. The procedure involved screening large numbers of treated spores for their ability to form macroscopically visible prothalli when cultured in the absence of blue light (normally required for prothallial growth). Two hundred and eighty presumptive nonfilamentous mutants were isolated and thirty-nine actively growing strains were tested for expression of the mutant phenotype. The 20 stable mutants thus obtained will provide material for further genetic characterization of the photomorphogenetic process in fern gametophytes.</p></div>","PeriodicalId":20794,"journal":{"name":"Radiation Botany","volume":"14 4","pages":"Pages 281-285"},"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)80019-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91741440","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}
Radiation BotanyPub Date : 1974-12-01DOI: 10.1016/S0033-7560(74)80016-5
R.S. Kahan
{"title":"Accelerated and increased development of inflorescences in tomato plants from irradiated seeds","authors":"R.S. Kahan","doi":"10.1016/S0033-7560(74)80016-5","DOIUrl":"https://doi.org/10.1016/S0033-7560(74)80016-5","url":null,"abstract":"<div><p>Mecheast-22 cultivar tomato seeds were irradiated with 250–1000 rad doses of <sup>60</sup>Co gamma rays and the germinated seedlings transplanted to individual pots and grown in a greenhouse. The number of flower clusters, buds and open flowers were scored at 25, 45, 70 and 90 days after transplanting. Radiation caused earlier and increased flower cluster formation, possibly by stimulating a still unknown mechanism which initiates the change from vegetative to generative growth. At D45, all doses increased the number of flower clusters, 500 and 750 rads giving significant increases. This increase was maintained throughout the experiment. Most of the extra clusters were located along the side stems. All radiation treatments gave significantly more open flowers at the beginning of the flowering period. The 500 and 750 rad doses significantly increased the number of buds at 45 days, and of open flowers at 70 days after transplanting, the latter amounting to 6–6·5 extra flowers per plant. The mean number of flower buds or flowers per cluster and the percentage of clusters without flowers were not affected by radiation. The radiation treatments did not significantly affect the vegetative development of the plants, although there was a slight trend towards increased “tillering” at 500–1000 rads.</p></div>","PeriodicalId":20794,"journal":{"name":"Radiation Botany","volume":"14 4","pages":"Pages 257-262"},"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)80016-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91741441","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}
Radiation BotanyPub Date : 1974-12-01DOI: 10.1016/S0033-7560(74)80022-0
Sujit Bagchi
{"title":"A possible correlation between ageing and irradiation damage in rice","authors":"Sujit Bagchi","doi":"10.1016/S0033-7560(74)80022-0","DOIUrl":"https://doi.org/10.1016/S0033-7560(74)80022-0","url":null,"abstract":"<div><p>The germinability of aged seeds differed conspicuously among rice varieties. Varieties with high and low germinability in aged seeds also showed high- and low-resistance for both the characters of germinability and seedling height, when their freshly harvested seeds were irradiated by gamma-rays.</p></div>","PeriodicalId":20794,"journal":{"name":"Radiation Botany","volume":"14 4","pages":"Pages 309-313"},"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)80022-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91741447","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}
Radiation BotanyPub Date : 1974-12-01DOI: 10.1016/S0033-7560(74)80028-1
Alma Howard, C.W. Gilbert, D. Greene
{"title":"Dependence of radiation sensitivity on oxygen tension in Oedogonium—III. Applicability of the Howard-Flanders-Alper formula for 14 MeV neutron irradiation","authors":"Alma Howard, C.W. Gilbert, D. Greene","doi":"10.1016/S0033-7560(74)80028-1","DOIUrl":"https://doi.org/10.1016/S0033-7560(74)80028-1","url":null,"abstract":"<div><p>In vegetative cells of the green alga <em>Oedogonium cardiacum</em>, sensitivity to killing by 14 MeV neutron irradiation has been measured in water saturated with air, N<sub>2</sub>, or one of four different low oxygen-content gas mixtures. The results showed a reasonable fit to the <span>Howard</span>-<span>Flanders</span>-<span>Alper</span> formula for the relationship between radiation sensitivity and oxygen tension. The estimated parameters were: <em>K</em> = 9·308 ± 0·98 ͜M 1<sup>-1</sup> and <em>m</em> = 1·724± 0·024</p></div>","PeriodicalId":20794,"journal":{"name":"Radiation Botany","volume":"14 4","pages":"Pages 351-353"},"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)80028-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91741472","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: 4
Radiation BotanyPub Date : 1974-12-01DOI: 10.1016/S0033-7560(74)80030-X
Radiation BotanyPub Date : 1974-12-01DOI: 10.1016/S0033-7560(74)80025-6
Carl F. Jordan
{"title":"Respiration rates of red pine along a gradient of gamma radiation following eight years of exposure","authors":"Carl F. Jordan","doi":"10.1016/S0033-7560(74)80025-6","DOIUrl":"https://doi.org/10.1016/S0033-7560(74)80025-6","url":null,"abstract":"<div><p>Eleven-year-old red pine trees that had lived for eight yr along a gradient of gamma radiation changed little in respiration rates between exposure rates of 1·0–4·0 rads/day. Between 4·0–6·0 rads/day, respiration rates increased by an average of 54 per cent, and between 6·4 and 6·8 rads/day, respiration rates decreased by an average of 26 per cent. The increase in respiration rates may be due to oxygen consuming repair mechanisms. The decrease in respiration rates may result from reduced rates of cell division or reduced activity of growth hormones. The decrease probably did not result from dead tissue comprising part of the sample.</p></div>","PeriodicalId":20794,"journal":{"name":"Radiation Botany","volume":"14 4","pages":"Pages 337-341"},"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)80025-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90033082","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}
Radiation BotanyPub Date : 1974-12-01DOI: 10.1016/S0033-7560(74)80010-4
W. Jordan, A. Haber
{"title":"Cytokinins and mitotic inhibition in “gamma-plantlets”","authors":"W. Jordan, A. Haber","doi":"10.1016/S0033-7560(74)80010-4","DOIUrl":"https://doi.org/10.1016/S0033-7560(74)80010-4","url":null,"abstract":"","PeriodicalId":20794,"journal":{"name":"Radiation Botany","volume":"6 1","pages":"219-222"},"PeriodicalIF":0.0,"publicationDate":"1974-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85164131","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}
Radiation BotanyPub Date : 1974-12-01DOI: 10.1016/S0033-7560(74)80021-9
H. Paschinger, T. Vanicek
{"title":"Effects of gamma irradiation on the two mechanisms of Rb (K) uptake by Chlorella","authors":"H. Paschinger, T. Vanicek","doi":"10.1016/S0033-7560(74)80021-9","DOIUrl":"10.1016/S0033-7560(74)80021-9","url":null,"abstract":"<div><p><em>Chlorella</em> has two mechanisms of K uptake, depending on concentration. Mechanism 1 operates at low concentration and may be responsible for net transport. Mechanism 2 is dominant at high concentration (above 1 × 10<sup>−3</sup>M) and may be attributed to the K/K exchange system. In either case, Rb, which has a more favourable radioisotope, substitutes for K. Both mechanisms are temperature sensitive, dependent on metabolism, and carrier-mediated. At low Rb concentration (3 × 10<sup>−5</sup>M), γ-irradiation (60 krad) reduced Rb uptake at 30 °, but increased it at 10 °. At high concentration (3 × 10<sup>−3</sup>M) uptake was stimulated by irradiation at both temperatures. With K-deficient cells the Rb net transport contributed to a higher degree to total Rb influx, compared with normal cells. On γ-irradiation of K-deficient cells, at low concentration a decrease of the uptake was observed at both 30 ° and 10 °, and at high concentration the stimulation was less pronounced than with normal cells at both temperatures. It is suggested that the K/K exchange system is stimulated, but the K (Rb) net transport system is injured by irradiation. The increased K efflux after irradiation is about equal to the stimulated K (Rb) influx via the exchange system. Thus it is not necessary to assume enlarged membrane permeability to explain the increase of the K efflux after γ-irradiation.</p></div>","PeriodicalId":20794,"journal":{"name":"Radiation Botany","volume":"14 4","pages":"Pages 301-307"},"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)80021-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75635342","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}
Radiation BotanyPub Date : 1974-12-01DOI: 10.1016/S0033-7560(74)80011-6
A. Ashri, A. Levy
{"title":"Sensitivity of developmental stages of peanut (A. hypogaea) embryos and ovaries to several chemical mutagen treatments","authors":"A. Ashri, A. Levy","doi":"10.1016/S0033-7560(74)80011-6","DOIUrl":"https://doi.org/10.1016/S0033-7560(74)80011-6","url":null,"abstract":"","PeriodicalId":20794,"journal":{"name":"Radiation Botany","volume":"30 1","pages":"223-228"},"PeriodicalIF":0.0,"publicationDate":"1974-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78484906","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}