Geotropism or Gravitropism
sanaThe tropic movement in response to gravity of earth is called geotropism or gravitropism. The tip of the stem grows away from the gravity (negative geotropism) and the root tips…
Basic Genetic Engineering Techniques
rubabGenetic engineering techniques of such gene manipulation involve Isolation of a specific deoxyribonucleic acid (DNA) molecule Or molecules to be replicated (the passenger DNA) The joining of this DNA with…
Phototropism
The tropic movement of the part of plant in response to stimulus of light is called phototropism. Almost all part of the plant shows phototropism. I. Stem: A potted plant…
TROPIC MOVEMENT
The movements in curvature of whole organ towards or away form the stimuli such as light, gravity and touch are called tropic movement. It has different types. It may be…
PLANT MOVEMENTS
Movements are of universal occurrence in plants. Most of the plants are fixed. They can bend only their parts. It is called curvature movement. The locomotory movement of the animal…
FACTORS AFFECTING VERNALIZATION
Water and Oxygen Seed need to imbibe 20 10% water. Therefore, dry seed cannot be vernalized. Similarly oxygen is also necessary for vernalization. Oxygen is used during respiration. A germinating…
Mechanism of vernalization
Following views tried to explain the mechanism of vernalization: Concept of Gregory Gregory and coworker were working on cereals. They believed that vernalization process consists of several partial reactions. Cells…
Genetic Engineering or Genetic modification (GM)
The process of manipulating genes, usually outside the organism's normal reproductive process is called genetic engineering or genetic modification (GM) or gene splicing. It involves the isolation, manipulation and reintroduction…
Vernalization discovery, forms & site
The low temperature treatment given to the seed or plant for stimulating flowering in them is called vernalization. Some seeds required low temperature treatment to break dormancy. Similarly shoot bud…
DEFINITIONS AND KEY POINTS For Seed Dormancy
TERMS DEFINITIONS Seed dormany The physiological inability of a seed to germinate even under favourable condition called seed dormancy. Scarification The seed coat is punctured or mechanically ruptured by rubbing.…