Abstract In perennial plants, the management of nitrogen (N) and carbon (C) is crucial to their durability, and studies encompassing an integrative viewpoint on the dynamics, location and form of the reserves are still missing. The carbon and nitrogen components were measured from September to May in peach trees which received two different levels of N fertilisation (control and limited). Significant differences were observed in the N and non-structural carbon concentrations regarding the organs, locations, time and fertilisation level. During the autumn, N and C accumulate at all levels of the tree and are sharply remobilised for the spring growth resumption. Amino acids (AA), especially arginine, appear to be the main form of storage of N. More present in roots, short branches and apices, the AA reach their maximum concentration in February and drop sharply with bud development. The remobilisation of the AA is initially induced in the branches close to the aboveground plant parts structures in formation, and before the contribution of the roots pool. The non-structural carbon (starch, soluble sugars, and organic acids) also accumulate during the autumn. No major differences are observed in the position and the size of the branches. The starch present in the root is the main form of carbon reserve of the peach tree. The starch stocks decline very early in November and are then gradually restored while the tree becomes autotrophic in the spring. The deprivation of N essentially caused a significant decrease in the stocks of AA and erased the differences in concentrations found in relation to the typology of branches. So the tree modified its N management strategy in response to the fertilisation level. The concentration of arginine, the main amino acid present in the bark or in the roots, appears as a relevant marker of its N status.

中文翻译：

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桃树上氮和碳的时空管理（Prunus persicae L. Batsch.）

摘要 在多年生植物中，氮 (N) 和碳 (C) 的管理对其耐久性至关重要，但仍缺乏关于储量动态、位置和形式的综合观点的研究。从 9 月到 5 月，在接受两种不同施氮水平（对照和限制）的桃树中测量了碳和氮成分。在关于器官、位置、时间和受精水平的 N 和非结构碳浓度方面观察到显着差异。在秋季，N 和 C 在树的各个层次积累，并为春季恢复生长而急剧重新动员。氨基酸 (AA)，尤其是精氨酸，似乎是氮储存的主要形式。 更多存在于根、短枝和顶端，AA 在 2 月份达到最高浓度，随着芽的发育而急剧下降。AA 的再动员最初是在靠近地上植物部分结构的分支中诱导的，并且在根池的贡献之前。非结构碳（淀粉、可溶性糖和有机酸）也在秋季积累。在分支的位置和大小上没有观察到大的差异。根中存在的淀粉是桃树碳储备的主要形式。淀粉库存在 11 月初下降，然后逐渐恢复，而树木在春季变为自养。N 的剥夺基本上导致 AA 存量的显着减少，并消除了与分支类型相关的浓度差异。因此，该树根据施肥水平修改了其 N 管理策略。精氨酸是树皮或根中存在的主要氨基酸，其浓度似乎是其氮状态的相关标志物。