Hasegawa Shigeaki, Koba Keisuke, Tayasu Ichiro, Takeda Hiroshi, Haga Hiroki
Laboratory of Forest Ecology, Division of Environmental Science and Technology, Graduate School of Agriculture, Kyoto University, Kyoto, Japan.
J Plant Res. 2003 Jun;116(3):183-8. doi: 10.1007/s10265-003-0085-7. Epub 2003 Mar 8.
Carbon autonomy of current-year shoots in flowering, and of current-year shoots plus 1-year-old shoots (1-year-old shoot system) in fruiting of Siberian alder (Alnus hirsuta var. sibirica) was investigated using a stable isotope of carbon, (13)C. The current-year shoot and 1-year-old shoot systems were fed (13)CO(2) and the atom% excess of (13)C in flowers and fruits was determined. The majority of photosynthate allocated to flower buds was originally assimilated in the leaves of the flowering current-year shoots. Of all the current-year shoots on fruiting 1-year-old shoots, only those nearest to the fruits allocated the assimilated photosynthate to fruit maturation. These results indicate that the current-year shoots and 1-year-old shoot systems are carbon-autonomous units for producing flowers and maturing fruits, respectively.
利用碳的稳定同位素（13）C，研究了开花期当年生枝条以及结果期当年生枝条加1年生枝条（1年生枝条系统）对西伯利亚桤木（Alnus hirsuta var. sibirica）的碳自主性。给当年生枝条和1年生枝条系统供应（13）CO2，并测定花和果实中（13）C的原子百分超量。分配到花芽中的光合产物大部分最初是在开花当年生枝条的叶片中同化的。在结果的1年生枝条上的所有当年生枝条中，只有那些最靠近果实的枝条将同化的光合产物分配用于果实成熟。这些结果表明，当年生枝条和1年生枝条系统分别是生产花朵和果实成熟的碳自主单位。
