The apple maggot fl y, Rhagoletis pomonella (Walsh 1867) (Diptera: Tephritidae), is an economically important pest of apples (Malus domesica Borkh.) (Rosaceae) throughout much of the United States. The fl y is endemic to the eastern U.S., where its primary host plants are several species of native hawthorns (Crataegus spp.) (Rosaceae). About 150 years ago the fl y shifted to apples in the North...

Plants are host to a large amount of pathogenic bacteria. Fire blight, caused by the bacterium Erwinia amylovora, is an important disease in Rosaceae. Pathogenicity of E. amylovora is greatly influenced by the production of exopolysaccharides, such as amylovoran, and the use of the type III secretion system, which enables bacteria to penetrate host tissue and cause disease. When infection takes...

Gametophytic self-incompatibility (GSI) of Rosaceae, Solanaceae and Plantaginaceae is controlled by a single polymorphic S locus. The S locus contains at least two genes, S-RNase and F-box protein encoding gene SLF/SFB/SFBB that control pistil and pollen specificity, respectively. Generally, the F-box protein forms an E3 ligase complex, SCF complex with Skp1, Cullin1 (CUL1) and Rbx1, however, i...

Background and objective Particulate matter (PM) has a fatal effect on health. There have been many studies the use of plants such as trees shrubs eco-friendly sustainable biofilter for removal PM. In forming more green space, ground cover play an important role in multi-layered planting. This study was conducted to investigate ability reduce PM, targeting Korean native with high availability u...

Potentilla L. (Rosaceae) species have been used in traditional medicine in Asia, Europe and Northern America. This study analyzed the biological activity of aqueous extracts of Potentilla species (Rosaceae): Dasiphora fruticosa (syn. P. fruticosa), P. norvegica, P. pensylvanica, P. thuringiaca, P. crantzii and P. nepalensis. The activities were tested using MTT, NR and DPPH assays on normal hum...

The dried female flowers of Hagenia abyssinica (Bruce) J. F. Gmel. (Rosaceae) are traditionally used as an anthelmintic remedy in Ethiopia and formerly were incorporated into the European Pharmacopoeia. One-, two- and tricyclic phloroglucinol derivatives (kosins) were suggested to be the active principles. However, polar constituents may also contribute to the activity. Therefore, we investigat...

STEWART, C. N., JR. AND E. T. NILSEN (Biology Department, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061). Association of edaphic factors and vegetation in several isolated Appalachian peat bogs. Bull. Torrey Bot. Club 120: 128-135. 1993.-The vegetation of five Appalachian bogs (one site in Tennessee and four in West Virginia) was sampled using a point-quarter method....

*Bergius Foundation, Royal Swedish Academy of Sciences, Box 50017, SE-104 05 Stockholm, Sweden; †Botaniska Institutionen, Stockholms Universitet, SE-106 91 Stockholm, Sweden; ‡Department of Cell Biology and Molecular Genetics, University of Maryland, College Park, Maryland 20742-5815, U.S.A.; and §Department of Ecology and Evolutionary Biology, Yale University, P.O. Box 208106, New Haven, Conne...

This paper deals with two European species, Phyllonorycter mespilella (Hübner, 1805) and P. trifasciella (Haworth, 1828), that have colonized the subtropical Canary Islands. The Rosaceae leaf miner, P. mespilella, is recorded for the first time from Lanzarote and La Palma, while the Caprifoliaceae leaf miner, P. trifasciella, is recorded from Tenerife. We present the diagnoses of these species ...