The gibberellin phytohormones regulate growth and development throughout the plant lifecycle. Upstream regulation and downstream responses to gibberellins vary across cells and tissues, developmental stages, environmental conditions, and plant species. The spatiotemporal distribution of gibberellins is the result of an ensemble of biosynthetic, catabolic and transport activities, each of which can be targeted to influence gibberellin levels in space and time. Understanding gibberellin distributions has recently benefited from discovery of transport proteins capable of importing gibberellins as well as novel methods for detecting gibberellins with high spatiotemporal resolution. For example, a genetically-encoded fluorescent biosensor for gibberellins was deployed in Arabidopsis and revealed gibberellin gradients in rapidly elongating tissues. Although cellular accumulations of gibberellins are hypothesized to regulate cell growth in developing embryos, germinating seeds, elongating stems and roots, and developing floral organs, understanding the quantitative relationship between cellular gibberellin levels and cellular growth awaits further investigation. It is also unclear how spatiotemporal gibberellin distributions result from myriad endogenous and environmental factors directing an ensemble of known gibberellin enzymatic and transport steps.

赤霉素植物激素在整个植物生命周期中调节生长和发育。赤霉素的上游调节和下游响应随细胞和组织，发育阶段，环境条件和植物种类的不同而不同。赤霉素的时空分布是生物合成，分解代谢和运输活动合奏的结果，每种活动都可以针对时空分布来影响赤霉素的水平。近年来，了解赤霉素的分布得益于能够导入赤霉素的转运蛋白的发现，以及以高时空分辨率检测赤霉素的新方法。例如，用于赤霉素的遗传编码的荧光生物传感器被部署在拟南芥中，并在快速伸长的组织中揭示了赤霉素的梯度。尽管假设赤霉素的细胞积累可调节发育中的胚胎，发芽的种子，茎和根的伸长以及花器官的发育，但了解赤霉素水平与细胞生长之间的定量关系尚待进一步研究。还不清楚时空赤霉素的分布是如何由无数的内源性和环境因素导致的，这些内在因素和环境因素指导了已知赤霉素的酶促和转运步骤的集合。