A Period During Which The Embryo Of A Seed Is Alive But Not Growing Is?

A Period During Which The Embryo Of A Seed Is Alive But Not Growing Is
Step 1. The mechanism in which seeds are prevented from germination during a particular condition is called seed dormancy. In this stage, the seeds are entering a state where it is alive but there is an absence of growth and development.

What is the seed’s dormancy period?

Conclusion: Dormancy is a lack of germination in seeds/tubers despite the presence of the necessary conditions (temperature, humidity, oxygen, and light) due to an impermeable hard seed coat or a lack of supply and activity of the enzymes required for germination.

  1. A significant factor limiting the production of many field crops is dormancy.
  2. Various physical and chemical pretreatments are applied to organic material (seeds/tubers) in order to break dormancy.
  3. Some plant species exhibit both physical and internal dormancy, making it difficult to provide high-frequency healthy seedling growth, whereas the sprouting of sown seeds/tubers and the formation of healthy seedlings are essential for plant production.

This chapter focuses on four methods for overcoming dormancy that have not been reported elsewhere. We believe that these newly described methods will assist growers and researchers in overcoming the problem of dormancy in plant production.

Dormancy is a period in the life cycle of an organism during which growth, development, and (in animals) physical activity cease temporarily. This reduces metabolic activity and aids an organism in conserving energy. Dormancy has a strong correlation with environmental conditions.

  • By predictive or consequential means, organisms can synchronize the onset of a dormant phase with their surroundings.
  • When an organism enters a dormant phase prior to the onset of adverse conditions, this is known as predictive dormancy.
  • Many plants, for instance, use photoperiod and decreasing temperature to anticipate the onset of winter.
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Consequential dormancy occurs when organisms enter a dormant phase following the emergence of adverse conditions. This is a common occurrence in climate-variable regions. Extremely abrupt changes in environmental conditions can result in a high mortality rate among animals that rely on consequential dormancy.

What is an illustration of dormancy?

Dormancy is a period during which a plant does not grow, awaiting conditions such as optimal temperature, moisture, and nutrient availability. The volcano erupted after centuries of dormancy, which could have been temporary. a state of inactivity and calmness.

What are seeds? Is it alive or nonliving? | Questions and Answers | guardian.co.uk What are seeds? Is it alive or inanimate? India’s K Vishwanath, Bangalore A seed is the embryo of a new plant and, as such, is a living thing; however, it is dormant and must be buried in soil or other suitable material to initiate the renewal process.

Jack Hill, St Albans England

Jack Hill, St Albans England It has the potential for life if given the means, and it can die if not provided with adequate care, so I would say it is.

Anonymous,

Anonymous, The trigger is actually a combination of temperature, light, and humidity. The matter surrounding the seed is irrelevant.

Katarina, Slovenia

Katarina, Slovenia Seed is the product of a living organism, but it must decompose in order to be replaced by a similar or superior seed.

Tony, Lagos Nigeria

Tony, Lagos Nigeria Seeds are alive because, without care, they require water, light, and soil. It will die. Plants develop from seeds.

Tanya Francis, Australia, Wentworthville

Tanya Francis, Australia, Wentworthville Naturally, a seed contains life, as it is the embryo of a new plant. However, consider the seeds that cannot germinate. Can we refer to a seed in this state as a living organism?

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Mukesh Pd Gupta, Delhi India

Mukesh Pd Gupta, Delhi India What are seeds? Is it alive or nonliving? | Questions and Answers | guardian.co.uk

Is a seed dormant or dead?

It is alive, but remains dormant until certain conditions are met (e.g.temperature, soil, pH, moistureetc). However, as time passes, its viability and germination success decrease.

Many species’ seeds require a “breaking” of dormancy, which may be associated with a change in the seed coats or the state of the embryo itself, in order to germinate after exposure to conditions generally favorable for plant growth. Typically, the embryo has no inherent dormancy and will develop once the seed coat has been removed or sufficiently damaged to permit water to enter.

  • In such cases, germination depends on the seed coat rotting or being abraded in the soil.
  • Before germination can occur, either the inhibitors must be leached away by water or the tissues containing them must be destroyed.
  • Mechanical restriction of embryo growth is prevalent only in species with thick, tough seed coats.

Germination then depends on the abrasion or decomposition of the seed coat. In many seeds, the embryo cannot germinate until a certain amount of time has passed, even under optimal conditions. The nature of “after ripening” is unknown; it may be required for continued embryonic development in the seed or for a necessary finishing process.

  • Many winter-hardy plant seeds will not germinate unless they experience a period of low temperature, typically just above freezing.
  • Otherwise, germination fails or is significantly delayed, and early seedling growth is frequently abnormal.
  • This response of seeds to chilling parallels the control of dormancy by temperature in buds.) In some species, appropriate wavelengths of light promote germination, whereas in others, light inhibits germination.
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Red light promotes germination in the seeds of certain plants, while light of longer wavelength, in the “far red” region of the spectrum, inhibits germination. Uncertainty surrounds the precise significance of this response, but it may be a means of adjusting germination time to the season of the year or determining the depth of the seed in the soil.

Light sensitivity and temperature requirements frequently interact, with certain temperatures eliminating the light requirement entirely. Water is absorbed by the embryo during germination, resulting in the rehydration and expansion of the cells. Shortly after the initiation of water uptake, or imbibition, the rate of respiration increases and various metabolic processes, which were suspended or significantly reduced during dormancy, resume.

These events are associated with structural changes in the embryonic organelles (membranous bodies involved in metabolism).

What distinguishes quiescence from dormancy?

Dormancy is an inactive or sleeping state of a seed that requires a stimulus, such as scarification or cold treatment, for the embryo to resume growth. Quiescence is the embryo’s state of suspended growth. When exposed to favorable conditions, a dormant embryo can at any time resume its growth.

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