Fig. 5. Original plant supporting device with growing plants. The plant supporting device fabricated from a silicon tube with an external diameter (ϕ) of 8 mm, a wall thickness
of 1 mm and a length of 314 mm was developed. This original device was able to reduce the area of the air–liquid interface by 98% and the quantity of the liquid medium by
70% compared with an 85-mm-long, 45-mm-wide and 30-mm-high flat holder.