resulting in very low photo-toxicity, due to the use of minimal power of laser light. The key feature of the researchers' approach is that the plants grow in a environment nearly identical to the natural (lab) one. This is a major improvement over previously existing approaches in which plants grew under far-from-natural conditions.
They achieved high spatial resolution over long time periods (several days). This allowed them to uncover a new growth pattern of the root system. They also illustrate the power and versatility of the technique by recording, in the context of a whole growing organism, individual cell division as well as intra-cellular movement of organelles. This paper paves the way for exciting new discovery in plant developmental and cell biology.