The densities and distributions of airborne fungal spores known to cause respiratory tract disorders were monitored in three educational buildings located in different boroughs in Iaşi. Air samples from all locations were collected monthly over a period of 3 months (March-May 2011), using the Petri plate gravitational settling (passive) method. Petri plates containing nutrient media were exposed to room air for a 15-minute period, face upwards, to collect particles settling by gravity. A total of 6196 microfungal colonies were counted on 936 plates. During the sampling period 15 fungal genera were isolated and identified. Fungal spores density in the educational institution's air was within the sanitary level accepted for public buildings, with the exception of one high school classroom, which has the potential to put the occupants at risk of developing adverse health effects. Indoor results show differences for fungal genera distribution between the educational buildings. The dominant genera were represented by Penicillium, Cladosporium, Aspergillus and Alternaria with 41.7, 19.2, 13.7 and 11.2% of the total, respectively.
The knowledge about pome fruit trees bacterioses and their evolution in orchards is a major objective for plant protection.Erwinia amylovora and Pseudomonas syringae pv. syringae cause on attacked organs of Pomaceae species similar dieback symptoms in vegetative and flowering shoots of quince, pear and apple in spring. Both bacteria can produce disastrous diseases in orchards and are therefore of great economic importance. Biological materials represented by vegetative shoots, leaves and fruits of Pyrus spp., Malus spp., Cydonia spp. were used after isolation of different E. amylovora and Ps. syringae pv. syringae strains for in vitro infections. Results presented in this study established that for in vitro inoculation of Pomaceae species similar symptoms in case of leaves and, respectively different symptoms for vegetative shoots and fruits occurred. The occurrence time was the only difference, because Ps. syringae pv. syringae spread faster than E. amylovora. The vegetative shoots inoculated with E. amylovora, in comparison to Ps. syringae pv. syringae, were more damaged and for both bacteria the highest values for attack degree were recorded in case of pear species, followed by quince and apples, respectively. REZUMAT. Studiu comparativ privind infecţia in vitro cuErwinia amylovora şi Pseudomonas syringae pv. syringae la unele specii din familia Pomaceae. Acumularea cunoştinţelor despre bacteriozele pomilor seminţoşi şi evoluţia lor în livezi reprezintă un obiectiv major pentru protecţia plantelor. Erwinia amylovora şi Pseudomonas syringae pv. syringae produc, pe părţile aeriene ale speciilor din familia Pomaceae, simptome caracteristice, care se observă primăvara, în special la nivelul lăstarilor vegetativi şi al mugurilor floriferi. Lăstari vegetativi, frunze şi fructe de Pyrus spp., Malus spp. şi Cydonia spp. au fost utilizate pentru infecţii in vitro cu tulpini de Erwinia amylovora şi Brought to you by | New York University Bobst Library Technical Services Authenticated Download Date | 8/2/15 5:19 AM IRINA PARASCHIVA CHIRIAC, Fl. D. LIPŞA, E. ULEA 98 Pseudomonas syringae pv. syringae. Rezultatele prezentate în acest studiu au stabilit că, pentru inocularea in vitro a speciilor de Pomaceae cu tulpinile bacteriene, simptomatologia a fost similară în cazul frunzelor şi diferită în cazul lăstarilor vegetativi şi al fructelor. Timpul scurs până la manifestarea bolii reprezintă o primă diferenţă între cele două specii bacteriene, în sensul că bacteria Ps. syringae pv. syringae produce simptome mai repede decât bacteria E. amylovora. Lăstarii
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