A Novel Endo-1,4-β-Glucanase Gene (LlpCel1) Is Exclusively Expressed in Pollen and Pollen Tubes of Lilium longiflorum Studies on Cloning and Real-time Expression of Endo-1,4-β-glucanase Gene in Persimmon Fruit Studies on Cloning and Real-time Expression of Endo-1,4-β-glucanase Gene in Persimmon Fruit