{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,4]],"date-time":"2026-10-04T08:54:33Z","timestamp":1791104073452,"version":"4.1.0"},"reference-count":36,"publisher":"Akademiai Kiado Zrt.","issue":"2","content-domain":{"domain":["akjournals.com"],"crossmark-restriction":true},"short-container-title":[],"published-print":{"date-parts":[[2011,6,1]]},"abstract":"<jats:p>Spores of four<jats:italic>Frankia<\/jats:italic>strains, the nitrogen-fixing actinomycete, were exposed to short wavelength UV-C radiation of 254 nm at 1 lux cm<jats:sup>2<\/jats:sup>(0.24 mw cm<jats:sup>2<\/jats:sup>of energy) for 10 min. The used strains were HFP020203, UGL020604, UGL020602q and ORS021001. Exposure to UV was followed by reactivation with visible white light at 327.4 lux cm<jats:sup>2<\/jats:sup>for the same period of time. Spore germination percentage, spore protein content, and cell growth were damaged by this treatment. The lower and higher percentages of reduction in spore germination were 32 and 63% and, for the same strains, the recovery by white light was 7.2 and 37%. The lower percentages of UV damage and subsequent low recovery were recorded for strain ORS021001 that is considered more resistant to UV than the other strains. The higher percentages were recorded for strain HFP020203 that is more sensitive to UV but having more efficient repairing mechanisms. All the tested strains showed repairing activity induced by white light as indicated from the increase in their spore germination, protein content and almost restoring the normal shape of<jats:italic>Frankia<\/jats:italic>hyphae, after being damaged, as revealed by scanning electron microscope. This is the first evidence that photo-repairing systems are present in<jats:italic>Frankia<\/jats:italic>strains although there are variations in their response to both UV-C and photoreactivation by white light.<\/jats:p>","DOI":"10.1556\/amicr.58.2011.2.2","type":"journal-article","created":{"date-parts":[[2011,6,30]],"date-time":"2011-06-30T03:42:11Z","timestamp":1309405331000},"page":"93-103","update-policy":"https:\/\/doi.org\/10.1556\/policypage.crossmark.crossref.1","source":"Crossref","is-referenced-by-count":2,"title":["Preliminary evidence on photoreactivation of Frankia spores with visible light after exposure to UV-C radiation"],"prefix":"10.1556","volume":"58","author":[{"given":"W.","family":"Sayed","sequence":"first","affiliation":[{"name":"1 South Valley University Department of Botany, Faculty of Science Qena Egypt"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"425","reference":[{"key":"1","volume-title":"Plant Physiology","author":"Caldwell M. M.","year":"1978"},{"key":"2","doi-asserted-by":"crossref","first-page":"5","DOI":"10.1016\/S1011-1344(98)00182-1","article-title":"Changes in biologically active ultraviolet radiation reaching the Earth\u2019s surface","volume":"46","author":"Madronich S.","year":"1998","journal-title":"Photochem. Photobiol. B: Biol."},{"key":"3","doi-asserted-by":"crossref","first-page":"1403","DOI":"10.1078\/0176-1617-00549","article-title":"UV-A\/blue light-induced reactivation of photosynthesis in UV-B irradiated cyanobacterium, Anabaena sp","volume":"158","author":"Han T.","year":"2001","journal-title":"J. Plant Physiol."},{"key":"4","doi-asserted-by":"crossref","first-page":"109","DOI":"10.1007\/s11258-005-9034-y","article-title":"Effects of enhanced UV-B radiation on nitrogen fixation in arctic ecosystems","volume":"182","author":"Solheim B.","year":"2006","journal-title":"Plant Ecol."},{"key":"5","doi-asserted-by":"crossref","first-page":"179","DOI":"10.1046\/j.1365-3059.1997.d01-216.x","article-title":"The effect of ultraviolet-B (UV-B: 290-320 nm) radiation on blister blight disease of tea (Camelia sinensis)","volume":"46","author":"Gunasekera T. S.","year":"1997","journal-title":"Plant Pathol."},{"key":"6","doi-asserted-by":"crossref","first-page":"548","DOI":"10.1128\/MMBR.64.3.548-572.2000","article-title":"Resistance of bacterial endospores to extreme terrestrial and extraterrestrial environment","volume":"64","author":"Nickolson W. L.","year":"2000","journal-title":"Microbiol. Mol. Biol. Rev."},{"key":"7","doi-asserted-by":"crossref","first-page":"97","DOI":"10.1002\/em.1058","article-title":"Resistance of spores of Bacillus species to ultraviolet light","volume":"38","author":"Setlow P.","year":"2001","journal-title":"Environ. Mol. Mutagen."},{"key":"8","doi-asserted-by":"crossref","first-page":"35","DOI":"10.1016\/j.jphotobiol.2003.07.002","article-title":"Role of white light in reversing UV-B-mediated effects in the N2-fixing cyanobacterium Anabaena BT2","volume":"71","author":"Kumar A.","year":"2003","journal-title":"J. Photochem. Photobiol."},{"key":"9","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1007\/s10750-007-9126-x","article-title":"Effects of ultraviolet radiation on productivity and nitrogen fixation in the cyanobacterium Anabaena sp. (Newton\u2019s strain)","volume":"598","author":"Lesser M. P.","year":"2008","journal-title":"Hydrobiologia"},{"key":"10","doi-asserted-by":"crossref","first-page":"6029","DOI":"10.1128\/AEM.68.12.6029-6035.2002","article-title":"Photoreactivation of Escherichia coli after low- or medium-pressure UV disinfection determined by an endonuclease sensitive site assay","volume":"68","author":"Oguma K.","year":"2002","journal-title":"Appl. Environ. Microbiol."},{"key":"11","doi-asserted-by":"crossref","first-page":"225","DOI":"10.1039\/b201230h","article-title":"UV-induced DNA damage and repair: a review","volume":"1","author":"Sinha R. P.","year":"2002","journal-title":"Photochem. Photobiol. Sci."},{"key":"12","first-page":"207","article-title":"The changing irradiance environment consequences for marine macrophytes, physiology, productivity and ecology","volume":"32","author":"Franklin L. A.","year":"1997","journal-title":"Eur. J. Physiol."},{"key":"13","doi-asserted-by":"crossref","first-page":"5488","DOI":"10.1128\/AEM.67.12.5488-5496.2001","article-title":"Effect of solar UV-B radiation on a phyllosphere bacterial community","volume":"67","author":"Jacobs J. L.","year":"2001","journal-title":"Appl. Environ. Microbiol."},{"key":"14","volume-title":"DNA repair and mutagenesis","author":"Friedberg E. R.","year":"1995"},{"key":"15","volume-title":"Biological effects of ultraviolet radiation","author":"Harm W.","year":"1980"},{"key":"16","doi-asserted-by":"crossref","first-page":"357","DOI":"10.1093\/plankt\/19.3.357","article-title":"UV-B-induced damage and photoreactivation in three species of Boekella (Copepoda, Calanoida)","volume":"19","author":"Zagarese H. E.","year":"1997","journal-title":"J. Plankton Res."},{"key":"17","doi-asserted-by":"crossref","first-page":"1435","DOI":"10.1128\/AEM.65.4.1435-1443.1999","article-title":"Location and survival of leaf-associated bacteria in relation to pathogenicity and potential for growth within the leaf","volume":"65","author":"Wilson M.","year":"1999","journal-title":"Appl. Environ. Microbiol."},{"key":"18","doi-asserted-by":"crossref","first-page":"821","DOI":"10.1016\/S1568-7864(02)00107-6","article-title":"DNA damage-processing in E. coli: On-going protein synthesis is required for fixation of UV-induced lethality and mutation","volume":"1","author":"Burger A.","year":"2002","journal-title":"DNA Repair"},{"key":"19","first-page":"39","article-title":"UV-radiation-induced formation of DNA bipyrimidine photoproducts in Bacillus subtilis endospores and their repair during germination","volume":"10","author":"Moeller R.","year":"2007","journal-title":"Intl. J. Microbiol."},{"key":"20","doi-asserted-by":"crossref","first-page":"1058","DOI":"10.1128\/JB.113.2.1058-1060.1973","article-title":"Photoprotection by dipicolinate against inactivation of bacterial spores with ultraviolet light","volume":"113","author":"Grecz N.","year":"1973","journal-title":"J. Bacteriol."},{"key":"21","volume-title":"Viable transfer of microorganisms in the solar system and beyond","author":"Horneck G.","year":"2002"},{"key":"22","doi-asserted-by":"crossref","first-page":"249","DOI":"10.1016\/j.mrfmmm.2004.10.012","article-title":"The solar UV environment and bacterial spore UV resistance: Considerations for Earth-to-Mars transport by natural processes and human spaceflight","volume":"571","author":"Nickolson W. 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Microbiol."},{"key":"26","doi-asserted-by":"crossref","first-page":"2815","DOI":"10.1139\/b83-312","article-title":"An effective strain of Frankia from Casuarina sp","volume":"6","author":"Diem H. G.","year":"1983","journal-title":"Can. J. Bot."},{"key":"27","doi-asserted-by":"crossref","first-page":"61","DOI":"10.1007\/BF02277840","article-title":"Growth kinetics and nitrogenase induction in Frankia sp. HFPArI3 growth in batch culture","volume":"78","author":"Murry M.","year":"1984","journal-title":"Plant and Soil"},{"key":"28","doi-asserted-by":"crossref","first-page":"1251","DOI":"10.1139\/b91-162","article-title":"Frankia spores of strain HFPCg14 as inoculum for seedlings of Casuarina glauca","volume":"69","author":"Mansour S. R.","year":"1991","journal-title":"Can. J. Bot."},{"key":"29","volume-title":"Selected exercises from Microbes in action: A laboratory manual of microbiology","author":"Seeley H. W.","year":"1981"},{"key":"30","doi-asserted-by":"crossref","first-page":"248","DOI":"10.1016\/0003-2697(76)90527-3","article-title":"A rapid and sensitive method for the quantification of microgram quantities of protein utilizing the principle of protein-dye binding","volume":"72","author":"Bradford M. M.","year":"1976","journal-title":"Anal. Biochem."},{"key":"31","doi-asserted-by":"crossref","first-page":"57","DOI":"10.1023\/A:1024911231889","article-title":"Germination and physiological properties of Frankia spores","volume":"254","author":"Krumholz G. D.","year":"2003","journal-title":"Plant and Soil"},{"key":"32","doi-asserted-by":"crossref","first-page":"27","DOI":"10.1023\/A:1020561122764","article-title":"Bacterial endospores and their significance in stress resistance","volume":"81","author":"Nickolson W. 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