Purpose of Review

Carbon (C) storage provides trees with a pool of C that can be remobilized and used to sustain vital physiological processes when photosynthesis and/or C transport cannot meet a plant’s current demands. As such, it may be an important determinant of tree survival in many cases. However, we do not yet know how often tree mortality occurs as the result of carbon limitation, and therefore it remains unclear whether C storage is important for preventing tree death. The purpose of this review is therefore to summarize and assess recent research regarding the role of C storage in tree survival under different stressors and disturbances.

Recent Findings

Both recent and older work have identified many potential mechanisms by which C storage may influence tree survival, and there is evidence that higher tissue non-structural carbohydrate concentrations or total content can be associated with survival and recovery following defoliation and aboveground tissue destruction and under deep shade, drought, flooding, biotic attack, and freezing temperatures. However, in most cases, there is also evidence suggesting that C storage does not always or even often influence survival. Both drought and flooding may lead to inhibition of C transport, particularly to the roots, suggesting that increased root storage specifically might play a critical role in survival; however, this remains to be tested. In some cases, the ability to maintain C assimilation and transport might be more critical than increasing storage.

Summary

Though C storage can affect survival, we are far from knowing how common or uncommon this pattern is. Future work exploring the relationship between survival and storage needs to focus on measuring C storage in all organs and tissues, considering the importance of total storage content, not just concentrations, identifying the relevant compounds in different species that constitute the actual storage pool, and carefully separating out the effects of storage from other factors that also tend to change when storage concentrations are altered.

中文翻译：

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碳储备是否能在压力和干扰后增加树木的存活率？

审查目的

碳（C）储存为树木提供了碳库，当光合作用和/或C传输不能满足植物当前的需求时，碳库可以被转移并用于维持重要的生理过程。因此，在许多情况下，它可能是树木存活的重要决定因素。然而，我们尚不知道碳限制导致树木死亡的频率如何，因此，目前尚不清楚碳储存对预防树木死亡是否重要。因此，本综述的目的是总结和评估有关碳存储在不同胁迫和干扰下树木存活中的作用的最新研究。

最近的发现

近期和较早的研究都确定了碳储存可能影响树木存活的许多潜在机制，并且有证据表明，较高的组织非结构性碳水化合物浓度或总含量可能与脱叶和地上组织破坏以及深层地下的存活和恢复有关。阴凉，干旱，洪水，生物攻击和冰冻温度。但是，在大多数情况下，也有证据表明C储存并不总是或什至经常影响生存。干旱和洪水都可能导致抑制C转运，特别是对根部的转运，这表明增加的根部贮藏量可能在存活中起关键作用。但是，这仍有待测试。在某些情况下，

概要

尽管C存储会影响生存，但我们远不知道这种模式有多普遍或罕见。未来探索生存与储存之间关系的工作需要着重于测量所有器官和组织中的C储存，考虑总储存含量的重要性，而不仅仅是浓度，确定构成实际储存池的不同物种中的相关化合物，并仔细将存储的影响与其他因素分开，当存储浓度改变时，其他因素也趋于改变。