Vascular plants have two types of sap: raw sap and processed sap. The difference that distinguishes them is that the raw sap is a combination of mineral salts and other substances and the elaborated sap is made up of glucose, water and minerals produced by photosynthesis.
It is the sap transferred by the xylem, it is composed of water, mineral elements, growth regulators and other dissolved substances. It moves from roots to leaves by means of strong tubes.
The crude sap is formed by water and different inorganic mineral salts that the roots attract from the soil through the root hairs and that passes through the woody or ascending vessels known as xylem.
This sap is transferred to the leaves where photosynthesis transforms it into elaborated sap. The form of transport of this sap has created great controversies.
It is transferred by the phloem from its origin of formation, being in leaves and green stems towards the root. It is made up of water, sugars, amino acids, vitamins, organic acids, dissolved minerals and phytoregulators.
In this case, the pressure flow hypothesis is accessed as a transport technique for the elaborated sap. It is transported by the phloem, a type of plant vascular tissue, it can flow bidirectionally, carrying nutrients to all the areas that the plant requires, be it photosynthetic organs.
Raw Sap and Processed Sap
|raw sap||Elaborated SAP|
|Raw sap is a combination of water, mineral salts, and other substances that are absorbed by the roots.||The elaborated sap is created in the leaves through photosynthesis; It contains sugars, minerals and other substances that the plant requires for its growth and development.|
|The crude sap is transferred by the xylem.||The elaborated sap is transferred by the phloem.|