Transpiration

 

Transpiration is the process of water loss from a plant through evaporation, mainly from the leaves via pores called stomata.

​​

​

​

​

​

​

​

​

​

​

​

Water is then pulled up through the leaves, through the xylem and through the roots. This process shows how water is absorbed in the roots and is called the ‘Transpiration Stream’.

 

Factors That Increase Transpiration Rate  

​

​

​

 

​

​

​

​

​

​

​

​

 

You can measure water lost by measuring mass lost over time (use balance)

 

Translocation  

 

Translocation is the movement of sugars (from photosynthesis) through phloem. 

Sugar travels from the leaves (location of photosynthesis) to growing tips, roots, fruits.

​

Transpiration can only occur up the plant (up from the roots to the leaves) whereas translocation can occur in both directions (sugars up to growing shoot tips or down to growing roots)