Water plant system

The water content of the cell is in the range of 60-90% (algae – 96-98%; lichens – 5-7%). Water in the plant body can occur as bound water, which is important for the plant in terms of its resistance to drought and low temperatures. This water evaporates more slowly and freezes as well slower comparing to the free water. Free water (storage water) is found in vacuoles and intercellular spaces.

Water system

The water plant system consists of three parts:

1. water intake – lower plants (e.g. algae) and water plants (submerged) receive water through the entire body surface. Higher plants absorb water through the root system. Water intake by leaves is omissible. Water intake is influenced by e.g. soil temperature (e.g. thermophilic plants stop water intake at 10 ° C), air permeability (oxygen to carbon dioxide ratio; optimal soil oxygen level is 10–12%), soil water content, soil solution concentration.

2. transport of water through the plant body – root buoyancy has the highest value in the afternoon and evening. For the transport of water over longer distances, they are found in the plants vessels and reels.

3. water precipitation – most water is passed in the form of water vapor and liquid through the leaves (to a lesser extent the entire surface of the plant). Water dispensing through water vapor is referred to as transpiration and liquid as gutting (displacing water droplets).