PoC culture platform. A) Representative millifluidic chip (detailed information in the Materials and methods section), showing a loaded plantlet. B) Abscised plantlets (former branch) line up along the channel. C) A peristaltic pump is connected to the chip to circulate liquid half-strength MS medium. D) Diagram of growth pattern; the branch ranks are indicated by different colors. E) Growth curve of cultured plantlets in the PoC in half-strength MS medium under short-day conditions at 26°C (n = 3).