The following points highlight the four main types of underground modified stems. The types are: 1. Rhizome 2. Tuber 3. Corm 4. Bulb. Type # 1. Rhizome: It is a fleshy modified stem which grows horizontally beneath the surface of the soil. It has distinct nodes and internodes and minute scale leaves at the nodes. Lateral buds come out as [...]
In this article we will discuss about the definition and conditions necessary for seed germination. Definition of Seed Germination: Germination is the process by which the embryo wakes up from the state of dormancy and takes to active life. This process, in fact, covers all the changes from the earliest sprouting of the seed till it established itself as an [...]
The following points highlight the two main types of seed. The types are: 1. Dicotyledonous Seeds 2. Monocotyledonous Seeds. Type # 1. Dicotyledonous Seeds: i. Gram Seed: The gram seed is more or less rounded at one end and pointed at the other. It is covered by a brown seed coat called testa; the inner whitish coat is the tegmen. [...]