| Usually cohesion theory (cohesion theory) to explain the transport of water when water plants continued problems. Between the same water molecules attract each other with a force, called cohesion. (According to the determination of water molecules in the plant cell as high as 20m or more cohesion) the weight loss of the blade, a lower water absorption begins, the end of the water column is always under pressure, while the own weight of water and that of water drop, so the Pull of falling water column generated tension. Water molecules cohesion tension than water column, so can keep the water column, which has a greater cohesion in the water enough to resist tension, ensure the water column from the leaf to the root causes of the continuous rise of water to explain the doctrine, the doctrine known as cohesion (cohesion theory) , also known as transpiration - cohesion - tension theory (transpiration-cohesion-tension theory), Irish hh · dixon proposed. |
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