Effects of chlortetracycline and 4-epi-chlortetracycline stress on seedling growth, antioxidant enzyme activities and accumulation in pakchoi PRODUCTION AND ROOTING ABILITY OF CUTTINGS COLLECTED FROM LARIX KAEMPEFERI(LAMB.)CARR.ORTETS HEDGED IN DIFFERENT TYPES EFFECTS OF PRUNING IN DIFFERENT TYPES ON GROWTH AND CUTTING PRODUCTION OF ORTETS AND ROOTING AND GROWTH OF CUTTINGS Ramets and Genets in the Tillering Clonal Herb Panicum miliaceum in Hierarchical Response to Heterogeneous Nutrient Environments The clonal integration of photosynthates in the rhizomatous half-shrub Hedysarum laeve