Effects of Drought Stress on Seed Germination and Seedling Physiological Characteristics of Rhododendron latoucheae Effect of seed soaking with aluminum on seed germination and seedling physiology of Platycodon grandiflorum Response of germination and growth of nine Festuca arundinacea Schreb varieties to zinc stress Effect of seed soaking with aluminum on seed germination and seedling physiology of buckwheat Relationship between the Seedling Growth of Quercus liaotungensis and Light