The dynamics of airborne conidia of Alternaria solani in potato canopy and its influence factor during growing season PATHOGENIC GROUPS OF SWEET-POTATO PSEUDOMON AS SOLAN ACEARUM AND ITS DISTRIBUTION AND DEVELOPMENT Comparison of root development and fluorescent physiological characteristicsof sweet potato exposure to drought stress in different growth stages Studies on sampling strategies of sweet potato core germplasm based on morphological traits Expression of movement protein gene and antiserum preparation of Potato virus X The molecular identification and the distribution of potato virus S in Fujian Province Detection of bacterial wilt infection in potato using PCR TECHNIQUES FOR VIRUS-FREE SWEET POTATO CULTURE Effects of climate change on potato growth in semi-arid region of Loess Plateau, China Effects of high- and low temperature stresses on ascorbic acid metabolism system in potato leaves. Effects of limited supplemental irrigation with catchment rainfall on potato growth in rainfed areas of western Loess Plateau Effects of light quality on microtuber induction of Solanum tuberosum L. Comparative Study on the Behavior in Solution and Thermal Character of Starch in Transgenic Potato with AGPase Effect of Silicon on the Growth of Test-tube Potato Plantlets and the Cell Wall Formation The Use of RAPD,ISSR and AFLP Markers for Analyzing Genetic Relationships among Sweetpotato Cultivars with Known Origin Genetic Variation in the Starch Gelatinization Characteristics of Sweet Potato with High Pigment Contents An Efficient Protocol for Agrobacterium-mediated Transformation with Microtuber and the Introduction of an Antisense class Ⅰ patatin Gene into Potato Variability of sweet potato storage root under different ecological environments and its correlation with quality traits Cytopathological Characterization of Tobacco on Co-infection with Tomato zonate spot virus and Potato virus Y