摘要
试验以两个蔓生长豇豆品种为材料，在不同时期不同叶位喂饲￣（１４）ＣＯ＿２，研究长豇豆叶片１４Ｃ光合产物的运转与分配规律。结果表明，长豇豆营养生长期，叶片的光合产物输出率较低（５４．８５％）。生殖生长期，上、中、下叶位叶片的光合产物输出率均较高，平均为８８．７４％，且随着叶位的上升而增大。营养生长期，叶片韵光合产物向上、下部器官运转，其中９５％以上运转到茎叶，且运转到上部茎叶的光合产物稍多，根只获得少量光合产物。生殖生长期，上、中、下位叶片的光合产物向各个器官运转分配，但主要运转到豆荚，运转到其他器官的光合产物很少。叶片的光合产物具有就近分配的特性，主要受植株的结荚状况，特别是豆荚发育程度所支配。
Photosynthate translocation and distribution were studied by feeding 14CO2
on differentleaf position during vegetative and reproductive periods in asparagus bean , cv.
Jinsui andNew-green. Radioactivity were measured in different organs after leaves being
labelled 24hours. The results showed that photosynthate export rate was lower(54. 85%)during
vegeta-tive period and it was higher (average 88. 74%)during reprodctive period and increased
withthe rise of leaf position. Photosynthates were translated to both upper and lower organs
dur-ing vegetatlve perlod,more!han 95%of photosynthate was transported to stem and
leaf.During reproductive period,photosynthates of leaf on upper,middle,lower leaf positionwere
transported to each organ,mainly to pod, few to others. Photosynthate was mainlytransported to
nearby pods.Distribution of photosynthate was mainly controlled by poddingcondition and
development of pods.
出处
《核农学报》
CAS
CSCD
1996年第1期30-34,共5页
Journal of Nuclear Agricultural Sciences
关键词
长豇豆
￣14C
叶位
光合产物
运转分配
Asparagus bean,￣14C,leaf
position,photosynthate,translocation and distri-bution
