长把梨果实早期发育动态研究

Study on Fruit Development Dynamic of Long-stalk Pear During the Early Stage

以长把梨果实为试材，通过田间测量、酸碱滴定及切片观察等方法，研究了果实发育前期果实纵横径、重量和体积、可溶性固形物含量、可滴定酸含量以及果肉中石细胞大小、石细胞团的数目等多项指标的变化。结果表明：长把梨果实在谢花后的20~40d内，果实纵横径逐渐增大，横径增长速度较快，果形指数逐渐变小；果实的重量和体积逐渐增大，体积增长较慢，重量增长比较显着；果实中可溶性固形物含量逐渐增加，可滴定酸含量逐渐下降，糖酸比持续增大；果肉中石细胞的纵横径都逐渐增大，但石细胞团的数目变化并不显着．

Taking long-stalk pear as material, fruit development index including fruit verttcat cttameter atlu u~ diameter,weight and hulk,the content of soluble solids and titratable acid,the stone cell size and the number of stone-cell groups and so on were detected through measuring in the field,acid-base titration and slice observation during the early stage of fruit development of long-stalk pear. The results showed that during 20~40 days after blossom both the fruit vertical diameter and transverse diameter gradually increased,but the fruit transverse diameter increased faster than the fruit vertical diameter,which resulted in the decrease of fruit shape index; fruit weight and bulk also increased during the stage,and fruit bulk increased slowly,while fruit weight increased obviously;the content of soluble solids showed the trends of increasing, titratable acid content declined gradually, and the ratio between content of soluble solids and titratable acid continuously increased; the vertical diameter and transverse diameter of stone cells in the pulp increased gradually along with fruit enlargement,but the number of stone cell group did not change prominently.