In this article we will discuss about the meaning and theories of ascent of sap. Meaning of Ascent of Sap: Plants lose enormous amounts of water by transpiration. Water is absorbed from the soil and is conducted upwards through roots and stems ultimately to reach the leaves. This becomes possible due to the presence of continuous conducting channels in the [...]
The following points highlight the four essential accessory whorls of a flower. The essential accessory whorls are:- 1. Calyx 2. Corolla 3. Androecium 4. Gynoecium. Accessory Whorls # 1. Calyx: The calyx is the outermost accessory set of floral leaves, consisting of sepals. Sepals are usually green inconspicuous bodies. They protect the essential whorls against mechanical injuries and desiccation in [...]
In this article we will discuss about the defensive mechanism in plants. 1. Very often plants are provided with hard sharp-pointed bodies which serve as weapons for self-defence. They may be morphologically different, but all of them carry on the same function. Thorns are the pointed organs, as found in Duranta (B. Mehdi). These are metamorphosed stems. Leaves or parts [...]