Department of Biological Sciences, Dickinson College, Carlisle, PA, USA.
Plant Signal Behav. 2012 Nov;7(11):1498-500. doi: 10.4161/psb.21900. Epub 2012 Sep 7.
Carbon translocation in plants is shaped by phyllotaxis and regulated by source/sink interactions that respond to the demands of growth and defense. We have studied this extensively in poplar saplings, and recently showed that unlike carbon import, nitrogen is not translocated to sink leaves in response to application of jasmonic acid. Here we report that this is also true for young trees in the field. We discuss the importance of transport processes in establishing local C:N ratios, and suggest that the JA-induced flow of C but not N to sink tissues, and their corresponding increases in C-based defenses, may simply reflect a plant adaptation to handle excess reduced carbon and energy.
植物中的碳转移受叶序的影响，并受源/库相互作用的调节，这些作用响应于生长和防御的需求。我们在杨树幼苗中对此进行了广泛研究，最近表明，与碳输入不同，氮不会响应茉莉酸的应用而转移到汇叶中。在这里，我们报告说，这对于田间的幼树也是如此。我们讨论了运输过程在建立局部 C:N 比中的重要性，并提出 JA 诱导的 C 流而不是 N 流到汇组织，以及它们相应的增加基于 C 的防御，可能只是反映了植物适应处理多余的还原碳和能量的一种方式。
