Influence of Salicylic Acid and Methyl Jasmonate on Leaf Microstructure,Leaf Photosynthesis,and Non-structure Sugar Accumulation of Salvia miltiorrhiza Bunge Seedlings Activity Changes for Enzymes Associated with Fiber Development and Relation with Fiber Specific Strength in Two Cotton Cultivars Expressions of Three Members of ACS Gene Family Induced by Ethephon Relationship of Ethylene Production and Sugar Accumulation in Sugarcane Stems Effects of exogenous Se mineral powder on the accumulation of Se and the absorption of mineral elements in maize Correlations Between Sucrose Accumulation and Activities of SPS, SS at Processing Maturing Stage of Sugarcane Genotypic Differences in Cellulose Accumulation of Cotton Fiber and Its Relationship with Fiber Strength Isolation and Expression Analysis of Fructokinase Genes from Citrus