Vernalization has multiple interactions with photoperiodism. Thus, a cold requirement for flowering appears to be associated with a specific photoperiod. The most well quoted instance is that of need for vernalization and LD which leads to flowering in late spring or early summer. However, a cold requirement may also be accompanied by a SD photoperiodic response. Vernalization is also known [...]
In this article we will discuss about:- 1. Definition of Vernalization 2. Site of Vernalization 3. Nature of Vernalization Process 4. Application. Definition of Vernalization: The precise definition of vernalization is not universally accepted. The term is best defined as the specific promotion of flowering by a cold treatment given to the imbibed seed or young plant. In certain seeds, [...]
In this article we will discuss about:- 1. Meaning of Photoperiod 2. Photoperiodic Response Groups 3. Photoinductive Cycles 4. Genetic Approach 5. Flowering Hormone. Subject-Matter of Photoperiod: Two American plant physiologists, W.W. Garner and H.A. Allard (1920) while working at the USA department of Agriculture Research Laboratories at Beltsville, Maryland made observations that tobacco variety, Maryland Mammoth, grew vegetatively in [...]