Question

• Do branches with flowers do transpiration as quickly as plants without flowers? Why? Explain well.

Answer 1

Answer- The transpiration rate in flowering plants is similar to that of non-flowering plants as the transpiration occurs at stomata, which are located underside of the plant leaves. In transpiration, there is water movement through the plant and the water evaporates from the leaves through stomata. The stomata are bordered by guard cells that regulates opening and closing of the pore.

The flow of liquid water from the roots to the leaves occurs by capillary action.If the water potential in the air is lower than the water potential in the leaf stomata, water vapor will travel from the leaf airspace to the atmosphere. This evaporation increases the tension on the water menisci in the cell walls. Because of the cohesive properties of water, the tension travels through the leaf cells to the xylem where negative pressure is created as water is pulled up the xylem from the roots. As the evaporation occurs at the leaf surface, the cohesive property of water helps to pull water molecules from the roots, through xylem tissue, and through stomata, out of the pland.