RW-spaces and compactness of function spaces for L-domains

AbstractThe purpose of this paper is to study the Lawson compactness of function spaces for L-domains. A basic notion of property RW for core compact spaces is introduced, which is proved to have a close relation to the Lawson compactness of function spaces for continuous L-domains as following: (1)Every Lawson compact continuous dcpo has property RW (via the Scott topology) and for each continuous L-domain, Lawson compactness is equivalent to property RW;(2)Let P be a continuous dcpo with a least element. Then [X→P] is compact continuous for every core compact space X with property RW iff P is compact continuous L-domain;(3)Let X be a core compact space. Then [X→P] is compact for every compact continuous L-domain P iff X has property RW

THE SITUATION AND EXISTENT PROBLEM OF ENTREPRENEUR GROUP CONSTRUCTION OF CHINA

Entrepreneur is the engine of sustainable development of the enterprise. Strengthening entrepreneur group construction is the necessary demand for establishing and consummating modern entrepreneur’s institution and coming true economy development calmly and fastly. This paper analyzes basic status in quo of China’s entrepreneur on the basis of definiting entrepreneur’s meaning, points out the existent problem of Entrepreneur Group Construction of China. Key words: China, Entrepreneur, Entrepreneur Group Constructio

The SNARE protein FolVam7 mediates intracellular trafficking to regulate conidiogenesis and pathogenicity in Fusarium oxysporum f. sp. lycopersici.

Soluble N-ethylmaleimide-sensitive factor attachment protein receptors (SNAREs) are conserved in fungi, plants and animals. The Vam7 gene encodes a v-SNARE protein that involved in vesicle trafficking in fungi. Here, we identified and characterized the function of FolVam7, a homologue of the yeast SNARE protein Vam7p in Fusarium oxysporum f. sp. lycopersici (Fol), a fungal pathogen of tomato. FolVam7 contains SNARE and PX (Phox homology) domains that are indispensable for normal localization and function of FolVam7. Targeted gene deletion showed that FolVam7-mediated vesicle trafficking is important for vegetative growth, asexual development, conidial morphology and plant infection. Further cytological examinations revealed that FolVam7 is localized to vesicles and vacuole membranes in the hyphae stage. Moreover, the ΔFolvam7 mutant is insensitive to salt and osmotic stresses and hypersensitive to cell wall stressors. Taken together, our results suggested that FolVam7-mediated vesicle trafficking promotes vegetative growth, conidiogenesis and pathogenicity of Fol