Prior to 1893 it was thought that root cells were responsible for

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Prior to 1893, it was thought that root cells pumped water upward through the plant, also known as the root pressure theory. It was not until the cohesion-tension theory was established in 1893 that it became clear that transpiration, cohesion, and bulk flow were responsible for transporting water and nutrients throughout the plant. Sucrose transportation is primarily carried out by specialized cells called phloem.

Prior to 1893 It Was Thought That Root Cells Were