What is the hydrostatic skeleton of a plant?
Hydrostatic skeleton is not a term that I’ve ever seen used when talking about plants. However, it must refer to the fact that much of the support in non-woody plants is given by turgid cells. In a dilute solution animal cells absorb water by osmosis, and may absorb so much that they burst. This is because there is a higher concentration of water outside the cell, so it enters by osmosis. Without a wall to prevent expansion, the cell gets bigger. In a concentrated solution an animal cell loses water by osmosis and shrinks. There is a higher concentration of water inside the cell so it moves out by osmosis.