库-源关系对枣树^(14)C-光合产物分配的影响  

EFFECT OF SINK-SOURCE RELATIONSHIPS ON PARTITIONING OF^(14)C PHOTOSYNTHATES IN CHINESE DATE(ZIZYPHUS JUJUBA)

作　　者：刘平[1] 温陟良[2] 彭士琪[2] 郭振怀[2] 

机构地区：[1]河北农业大学中国枣研究中心,保定071001 [2]河北农业大学园艺学院,保定071001

出　　处：《林业科学》2003年第4期37-42,共6页Scientia Silvae Sinicae

基　　金：河北省博士基金

摘　　要：运用1 4C示踪技术对赞皇大枣果实发育期库 -源比例和相对位置对1 4C -光合产物在不同器官中的分配进行了研究。结果表明 :果实缓慢生长期间 ,与单果枣吊相比 ,双果枣吊果实的放射比活性下降 ,但是果实获得的1 4C -光合产物量增加了 6 6 8% ;枣吊去叶处理 (均匀去掉一半叶片 )后 ,剩余叶片的光合产物输出率增加了 17 0 6 % ,果实获得的标记光合产物增加了 15 2 6 % ;当果实一侧叶片去除时 ,其异侧叶片也能提供一定量的光合产物供果实生长发育所需 ;并且 ,同一枣股不同枣吊之间也存在着光合产物的相互交换。本文从营养学角度对枣树低坐果率的原因进行了探讨。The effect of sink source ratio and position on partitioning of 14 C photosynthates in Chinese Date was studied by 14 C tracer technique in this paper.The results showed that compared with one\|fruit branch, 14 C specific activity of fruits of two\|fruit branch decreased while total 14 C photosynthates increased by 6 68%. The proportion of photosynthates exported from remained leaves was raised by 17 06% when the leaves of fruit branch were removed(half of all),and the proportion of labeled photosynthates imported to fruits was also raised by 15 26%;The photosynthates exchanged mutually among fruit branches at the same mother branch; The other side leaves could provide fruits with photosynthates when the same side leaves were removed. The reason of lower fruit set was also discussed.

关 键 词：库-源关系 枣树 ^14C-光合产物 运输分配规律 影响因素 果实 生长发育 

分 类 号：S665.1[农业科学—果树学]