PLANT RESPONSE

TRANSPIRATION

• the act or process or an instance of transpiring; especially : the passage of watery vapor from a living body (as of a plant) through a membrane or pores

DEHYDRATION

• the process of dehydrating; especially : an abnormal depletion of body fluids

TURGOR PRESSURE

• Turgor pressure. This pressure, turgidity, is caused by the osmotic flow of water from an area of low solute concentration outside of the cell into the cell's vacuole, which has a higher solute concentration. Healthy plant cells are turgid and plants rely on turgidity to maintain rigidity.

GEOTROPISM

• a tropism (as of plant roots) in which gravity is the orienting factor

PHOTOTROPISIM

• a tropism in which light is the orienting stimulus

GRAVITATIONAL TROPISM

• Tropisms are directional movement responses that occur in response to a directional stimulus. Plants are not able to relocated if they happen to start growing where conditions are suboptimal. However, plants can alter their growth so they can grow into more favorable conditions, To do so requires the ability to detect where the conditions are better and then alter their growth so they can "move" in the appropriate direction. One of the most commonly observed tropic responses in plants is phototropism, in which plant stems grow towards light. As anyone who has grown plants near a window knows, the plants tend to lean towards the window where the light is usually stronger than inside the room. Another commonly observed tropic responses is gravitropism, where a plant will grow so that it stays oriented relative to the source of gravity (the earth). Thus, if a plant is knocked down the shoot will grow faster on the lower side until the shoot is more-or-less standing up again.