Analysis of inter-branch relationships in the tree individual based on C/N sink-source balance

在每个红脉槭树的一半的分支保持未处理（控制分支，CB），和，对于其他（操作分支，MB），无论是光强度或叶面积（都涉及到光合源活性）或芽伸长（源+库活动）减少。这些操纵也影响了操纵当年的CB和次年的两个分支。光照对分支粗生长的影响最大，其次是枝伸长和叶面积。为了了解油茶生殖枝在多大程度上是自主的，我们通过选择营养或生殖相邻枝，或去除生殖枝的叶子，并用^C光合标记相邻枝来操纵生殖枝及其相邻枝之间的库源平衡<13>。在<13>有叶的未标记枝条中，^C的原子%没有增加，而在脱叶的未标记枝条中，^C的原子%显著增加。这两个实验的结果是树木生长建模的基础。

Half the branches in each Acer rufinerve tree were kept untreated(control branches, CBs), and, for the others(manipulated branches, MBs), either light intensity or leaf area(both relating to photosynthetic source activity) or shoot elongation(source+sink activities) was reduced. The manipulations also affected CBs in the year of manipulation and both branches in the next year. The branch diameter growth was most affected by light, followed by shoot elongation and leaf area, in that order. To know to what extent reproductive shoots are autonomous in Camellia sasanqua, we manipulated the sink-source balance between the reproductive shoots and their adjacent shoots by selecting vegetative or reproductive adjacent shoots, or defoliating the reproductive shoots, and photosynthetically labeled adjacent shoots with<13>^C. The atom% of<13>^C did not increase in the unlabeled shoots that had leaves, whereas that in the defoliated, unlabeled shoot was significantly increased. The results of these two experiments are fundamental basics for the tree growth modeling.