The following points highlight the five transformation technologies used for trans-genesis of plants. The technologies are: 1. Agrobacterium 2. Shotgun 3. Microinjection 4. DNA Uptake 5. Antisense RNA. Transformation Technology # 1. Agrobacterium: Agrobacterium tumefaciens a Gram-negative soil bacterium can induce crown galls on the stems of various plants. The phytopathogenic function of the bacterium is encoded in a tumour [...]
The following points highlight the two main mechanisms of Gravitropism. The mechanisms are: 1. Sensory Mechanism 2. Reaction Mechanism. Gravitropism: Mechanism # 1. Sensory Mechanism: Plants can perceive the direction of the gravitational stimulus in relation to their orientation, suggesting the existence of some sort of gravity-sensing or geo-perceptive mechanism. Primarily, geo-perception occurs in the root cap or shoot-tip region [...]
The following points highlight the two main types of nastic movements in plants.The types are: 1. Oscillatory Movements 2. Single-Event Movements. Nastic Movement: Type # 1. Oscillatory Movements: Oscillatory nastic movements may be based on either diurnal periods or on shorter periods. Nyctinastic movements are the diurnal movements. The leaflets of Trifolium repens show nyctinastic movement. The terminal leaflet closes [...]