Rosa Braunii n. sp.

Ohne Zusammenfassung     

Rosa sancti-Andreae Deg. etTrautm.

Der Autor hat im Jahre 1966 den ursprünglichen Fundort vonRosa sancti-Andreae Degen etTrautmann beim Städtchen Szentendre in Ungarn besucht, wo der Strauch, nach dem die neue Art im Jahre 1924 beschrieben wurde, noch immer wächst. Er studierte auch umfangreiches Herbariummaterial aus dem Umkreise der Verwandtschaft der Art und auf Grund dieser Studien gelangte er zur Ansicht, dassRosa sancti-Andreae Deg. etTrautm. mit der früher beschriebenen ArtRosa pomifera Herrm. übereinstimmt und daher ihr Synonym ist.     

Rosa Liechtensteinii n. sp.

Ohne Zusammenfassung     

Rosa Hedevigae n. spec

Ohne Zusammenfassung     

Rosa Herbichiana n. sp

Ohne Zusammenfassung     

Rosa leopoliensis n. sp

Ohne Zusammenfassung     

Anti-Auxin Enhance Rosa Hybrida L. Micropropagation

Shoots of rose cultivars Super Star and Sonia were multiplied for ten subcultures at 4-week intervals on solidified Murashige and Skoog's medium supplemented with 22.19 M benzylaminopurine + 1.07 M napthalene acetic acid + 0.05 M gibberellic acid. Addition of anti-auxins 2,3,5-triiodobenzoic acid (TIBA; 2.0 M) and 2,4,6-trichlorophenoxy-acetic acid (2,4,6-T; 0.39 M) into proliferation medium increased number of shoots per explant and length of shoots in both cultivars. Treatment with TIBA increased also number of leaves per shoot and leaf chlorophyll content.     

539. Rosa Chinensis f. Spontanea

Summary.  The wild form of the commonly cultivated Rosa chinensis Jacq., f. spontanea Rehder & Wilson, is illustrated and described. The history of its discovery and introduction to cultivation in western gardens is given. The typification and synonymy of R. chinensis are discussed.     

A new form of Rosa canina L.

The author submits the diagnosis of a new form of Rosa canina L. s.l., which grows in West Pomerania in the environs of Gryfino. It is a characteristic peculiarity of the taxon described that its pedicels are permanently and thickly pilose during the whole life of the plant.     

The Role of the st313-td Gene in Virulence of Salmonella Typhimurium ST313

Multidrug-resistant Salmonella enterica serovar Typhimurium ST313 has emerged in sub-Saharan Africa causing severe infections in humans. Therefore, it has been speculated that this specific sequence type, ST313, carries factors associated with increased pathogenicity. We assessed the role in virulence of a gene with a yet unknown function, st313-td, detected in ST313 through comparative genomics. Additionally, the structure of the genomic island ST313-GI, harbouring the gene was determined. The gene st313-td was cloned into wild type S. Typhimurium 4/74 (4/74-C) as well as knocked out in S. Typhimurium ST313 02–03/002 (Δst313-td) followed by complementation (02-03/002-C). Δst313-td was less virulent in mice following i.p. challenge than the wild type and this phenotype could be partly complemented in trans, indicating that st313-td plays a role during systemic infection. The gene st313-td was shown not to affect invasion of cultured epithelial cells, while the absence of the gene significantly affects uptake and intracellular survival within macrophages. The gene st313-td was proven to be strongly associated to invasiveness, harboured by 92.5% of S. Typhimurium blood isolates (n = 82) and 100% of S. Dublin strains (n = 50) analysed. On the contrary, S. Typhimurium isolates of animal and food origin (n = 82) did not carry st313-td. Six human, non-blood isolates of S. Typhimurium from Belarus, China and Nepal harboured the gene and belonged to sequence types ST398 and ST19. Our data showed a global presence of the st313-td gene and in other sequence types than ST313. The gene st313-td was shown to be expressed during logarithmic phase of growth in 14 selected Salmonella strains carrying the gene. This study reveals that st313-td plays a role in S. Typhimurium ST313 pathogenesis and adds another chapter to understanding of the virulence of S. Typhimurium and in particular of the emerging sequence type ST313.     

玫瑰花的化学成分研究(英文)

从玫瑰花中分离了7个化合物,通过波谱法和理化性质分别鉴定为没食子酸(1)、咖啡酸(2)、木犀草素(3)、槲皮素(4)、乔松素-7-O-β-D-葡萄糖苷(5)、槲皮素-4’-O-β-D-葡萄糖苷(6)、刺槐苷(7)。化合物2、3、5、6、7为首次从该植物中分得。     

Genetic differentiation of three endangered wild roses in northeastern Germany: Rosa inodora Fries, Rosa sherardii Davies and Rosa subcollina (H. Christ) Keller

Because of increased interest in the use of local provenances for restoration or landscaping projects, information about the genetic differentiation of plant species is required to delineate provenances for seed collection. To obtain information about population distinctiveness of endangered Rosa species occurring in Brandenburg (northeast Germany), we investigated the genetic differentiation of Rosa inodora, R. sherardii and R. subcollina using RAPD markers. All three species were uncommon in our study region. Φ-statistics, estimated by amova, revealed a low interpopulation differentiation for R. inodora (Φ(PT) = 0.19, P < 0.0001) and higher values for R. sherardii and R. subcollina (Φ(PT) = 0.29 and 0.30, P < 0.0001). UPGMA dendrograms and NMDS showed clear spatial differentiation for all species and a correlation between geographic and genetic distances. Due to predominantly high values of genetic differentiation and spatial patterns of ordination, we suggest small provenance regions for endangered Rosa species for seed collection.