【摘要】 采用14 C示踪方法研究了苹果不同砧木和砧穗组合植株对14 C 同化分配的影响。结果表明 ,矮砧及其嫁接植株的地上部分总干物质分配比例比乔砧及其嫁接植株高 1 4 %和 9 4% ,14 C 同化物分配比例高 1 9 2 %和 1 5 7% ;与乔砧相比 ,矮砧新梢、主干14 C放射比强度都较高 ;矮化中间砧红星新梢的放射性比强度是乔砧红星的 1 78倍 ,矮化中间砧段14 C存留量是相应乔砧植株干段的近 3倍 ,但矮化中间砧段上接口及其上部主干中并未有14 C 同化物积累。因此 ,矮化中间砧对同化物分配的影响并非简单的运输阻滞更多还原

【Abstract】 CO 2 was used to trace carbon assimilate transportation and distribution in different organs of different apple rootstocks and grafted trees. The results showed that dry matter in above ground for dwarfing rootstock and its grafted tree were 14% and 9 4% higher than those of normal rootstock and its grafted tree, respectively,and 14 C assimilate were 19 2% and 15 7% higher, respectively. 14 C specific activity in shoots of dwarfing rootstock and inter rootstock were 1 78 and 3 times stronger than those in normal rootstock, respectively. However,there is no accumulation of carbon assimilate in grafted area of inter rootstock and top truck above that. Therefore, the effect of dwarfing inter rootstock on carbon distribution was not because it simply blocked carbon transportation.更多还原