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 Racemose and Cymose Inflorescence. I. Racemose Inflorescences: i. Raceme: It is a racemose inflorescence in which the main axis goes on producing lateral stalked or pedicellate flowers in acropetal order. Example—Crotolaria (B. Atasi, Fig. 77, A), mustard. A compound raceme, in which the rachis is branched and branches bear the pedicellate flowers in [...]
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 [...]