The Casparian strip substitutes for their lack of cell membranes and prevents accumulated ions from diffusing passively in apoplast pathway out of the endodermis.
Passively heated houses, solar cells, organic food, fair trade products, hybrid cars and car sharing are just some vivid examples of sustainability innovations.
The antonym of homoiohydry is poikilohydry, a condition in which plant water content is passively reduced or increased in equilibrium with environmental water status.