The removal of all the phloem tissues of the stem of a plant close to the root system for a long period of time is likely to

Phloem is responsible for the transportation of the products of photosynthesis, including sugar and other nutrients from the leaves to other parts of the plant, including the roots. If all the phloem tissues of the stem of a plant close to the root system are removed for a long period of time, the roots will not receive the necessary nutrients to survive. Without the products of photosynthesis, the roots will not have enough energy to carry out important processes such as respiration and growth. Therefore, the most likely outcome of this scenario is that the plant will wither and eventually die.