How do you control dormancy?

How do you control dormancy?

Plant hormones, mainly abscisic acid (ABA) and gibberellin (GA), are the major endogenous factors that act antagonistically in the control of seed dormancy and germination; ABA positively regulates the induction and maintenance of dormancy, while GA enhances germination.

What do you mean by dormancy?

in a state of rest or inactivity; inoperative; in abeyance: The project is dormant for the time being. Biology. in a state of minimal metabolic activity with cessation of growth, either as a reaction to adverse conditions or as part of an organism’s normal annual rhythm.

What is the meaning of dormancy in biology?

Dormancy is a widely recognized behavioral and physiological state of both animals and plants that generally involves inactivity and reduced metabolic rate (Figure 1). Torpor is a similar term to dormancy, meaning inactivity or lethargy.

What’s the meaning of seed dormancy?

Seed dormancy is the state in which seed is unable to germinate, even under ideal growing conditions (Merriam-Webster). Because dormancy can be broken by most ideal growing conditions (different and specific for each species), the seeds germinate when they are the most likely to flourish.

What is PGR in botany?

The plant growth regulators (PGR) can be broadly divided into two groups based on their functions in a living plant body. One group of PGRs are involved in growth promoting activities, such as cell division, cell enlargement, pattern formation, tropic growth, flowering, fruiting and seed formation.

What is dormancy and its types?

There are two types of seed dormancy in general: seed coat (physical) dormancy and internal dormancy. In seed coat dormancy, the seed coat prevents oxygen and/or water permeating into the seed. Sometimes, dormancy is caused by inhibiting chemicals inside the seed.

What is dormancy in biology class 10?

Dormancy – Seed dormancy is a condition of plant seeds that prevents germination under optimal environmental conditions. Here the seed is in a state of apparent inactivity and will not grow even if favorable conditions are provided, until a definite time has elapsed.

Why is winter important for plants?

Winter transforms the garden too. Winter also provides plants with vernalization, which is a requirement for some species. Vernalization is a physiological process in some plants where the flowers, or sometimes the seeds, must go through a prolonged period of cold in order to blossom or germinate in the spring.

Why auxin is called growth regulators?

Auxins: These are growth promoting substances that contribute to the elongation of shoots, but at high concentrations they can inhibit growth of lateral buds. In addition to being used as plant growth regulators, auxins can also be herbicides (2, 4-D etc.).

What are the different plant regulators?

There are five groups of plant-growth-regulating compounds: auxin, gibberellin (GA), cytokinin, ethylene, and abscisic acid (ABA). For the most part, each group contains both naturally occurring hormones and synthetic substances.

What are the causes of dormancy?

Reasons or Causes of the Seed Dormancy

• Light.
• Temperature.
• Hard Seed Coat.
• Period after ripening.
• Germination inhibitors.
• Immaturity of the seed embryo.
• Impermeability of seed coat to water.
• Impermeability of seed coat to oxygen.

What is seed dormancy and how to prevent it?

Seed dormancy can be defined as the state or a condition in which seeds are prevented from germinating even under the favourable environmental conditions for germination including, temperature, water, light, gas, seed coats, and other mechanical restrictions.

What is the difference between dormancy and nondormancy?

However, definitions of dormancy are difficult because dormancy can only be measured by the absence of germination. We can observe completion of germination of a single seed as an all-or-nothing event, whereas dormancy of a single seed can have any value between all (maximum dormancy) and nothing (nondormancy).

Dormancy is a period in an organism’s life cycle when growth, development, and (in animals) physical activity are temporarily suspended for a specific period. Dormancy had derived from the word ‘Dormant’ meaning sleeping.

What are the advantages of dormancy?

Allows the seeds to continue to be in suspended animation without any harm during cold or high summer temperature and even under drought conditions. Dormancy helps seeds to remain alive in the soil for several years and provides a continuous source of new plants, even when all the mature plants of the area have died down due to natural disasters.