Question

what is the liquid collected from the xylem in the stem of plant

Answer 1

Water is the liquid in xylems

Answer 2

Transpiration is the process of water movement through a plant and its evaporation from aerial parts, such as leaves, stems and flowers. Water is necessary for plants but only a small amount of water taken up by the roots is used for growth and metabolism. The remaining 97–99.5% is lost by transpiration and guttation.