transpiration and translocation

• what is transpiration?

  The loss of water from a plant by evaporation
• What is the transpiration stream?

  the stream of water through the plants
• four factors affecting transpiration

  increase temp, humidity,wind,light intensity
• how does temperature affect transpiration

  particles have more energy to evaporate
• how does light affect transpiration

  the stomata open wider to let more carbon dioxide into the leaf for photosynthesis
• How does air flow affect transpiration?

  the wind blows away water vapour as soon as it diffuses out of the leaf. This maintains a strong concentration gradient between the inside and outside of the leaf, which increases the rate at which water diffuses out
• How does humidity affect transpiration?

  there is a lower concentration gradient between the inside and outside of the leaves, reducing the rate of water loss
• translocation

  the movement of sugars from the leaves to the rest of the plant through the phloem