Application of genetic algorithm in blending technology for extractions of Cortex Fraxini Photosynthetic Physiological Characteristics in F1 Progeny of Fraxinus mandshurica and Fraxinus americana under Drought Stress Selection of Proper Hormone Combinations for Direct in vitro Plant Regeneration from Bud Tips and Their in vitro Preservation for Fraxinus mandshurica Comparative Anatomy of Vessel Elements in Staminate and PistillatePlants of Fraxinus pennsylvanica Effects of Light and Nitrogen on Growth, Carbon and Nitrogen Metabolism ofFraxinus mandshurica Seedlings Physiological and Biochemical Responses of Different Order roots in Fraxinus mandshurica Seedlings to Drought Stress A New Variegated Leaf Fraxinus Variety ‘Jinguan’ Point pattern analysis of Fraxinus guilinensis population in karst mountains of Guilin Seasonal dynamics of root respiration of Fraxinus mandushurica Rupr. seedlings with different nitrogen rates Phenolic and phenylethanoidal glycosides from branch of Fraxinus sieboldiana Spatial Distribution Patterns and Associations of Dominate Population in Two Types of Broadleaved Korean Pine Mixed Forest