Transport of Substances in Plants: Transportation of water and minerals from the soil to leaves is an important step in the process of photosynthesis. This transported water along with carbon dioxide and sunlight helps leaves to prepare their food in the form of glucose. This glucose is utilized by most of the living cell to fulfill their energy requirements for carrying proper functioning. assignment help Transport of Substances in Plants
Water and minerals present in the soil are absorbed by root hairs present on roots of a plant. These root hairs serve the function of increasing the surface area of roots thereby increasing absorption of water and nutrients present in the soil.
Importance of vascular tissue in transportation
Transport of water and nutrients in a plant is carried out by certainly specialized pipe like structures known as vascular tissue. Plants have two types of vascular tissues namely Xylem and Phloem.
Xylem: This vascular tissue is specialized in transporting water and nutrients in the plants. It forms a web of channels inside a plant which connects roots to leaves via stems.
Phloem: This vascular tissue is specialized in transporting the food synthesized by leaves to different parts of plants.
To visualize the transport mechanism in plants one can follow a simple activity by peeling off a potato and cut it from one end to have a flat surface. Now make a deep hole on other side filled with sugar solution and keep the potato in a dish filled with water. The sugar level in potato may be marked using a pin. Increase in sugar solution level may be attributed to the transportation of water.
Leaves also have a specialized cell on its surface known as stomata which helps in removing excess of water present inside it by a process known as transpiration. This process is very important as not all the water absorbed by roots are utilized by leaves so there must be some mechanism to remove the excess water.