The four factors are: moisture, air, temperature, and light. Each factor is just as important as the other, because without them seed germination is impossible . Moisture is an important factor because without water, a plant will not survive. A seed will not grow into a plant without water.
What factors affect seed germination?
Environmental factors such as temperature, light, pH, and soil moisture are known to affect seed germination (Chachalis and Reddy 2000; Taylorson 1987). Burial depth of seed also affects seed germination and seedling emer- gence.
What is the most important factor in germination?
Seed germination depends on both internal and external conditions. The most important external factors include right temperature, water, oxygen or air and sometimes light or darkness .
Why is it important to maintain the abiotic factors affecting your seeds during germination?
Abiotic factors such as drought, light, salinity, seed burial depth, soil pH, and temperature as well as disturbance events such as a fire, flooding or tillage can play an important role in initiating or inhibiting seed germination [3–4].
What are the factors that affect germination How do these factors affect the process?
Soil temperature, diurnal temperature variation, soil moisture, light, nitrates concentration in the soil, and the gaseous environment of the soil can regulate seed germination and weed emergence (Merfield, 2013).
What are the 5 factors that affect seed germination?
Several variables might affect the germination, these variables include light, temperature, water, soil type, and air quality .
What are the 3 conditions necessary for germination?
All seeds need water, oxygen, and proper temperature in order to germinate. Some seeds require proper light also. Some germinate better in full light while others require darkness to germinate. When a seed is exposed to the proper conditions, water and oxygen are taken in through the seed coat.
What are the steps of germination?
Such five changes or steps occurring during seed germination are: (1) Imbibition (2) Respiration (3) Effect of Light on Seed Germination(4) Mobilization of Reserves during Seed Germination and Role of Growth Regulators and (5) Development of Embryo Axis into Seedling.
Which crop has highest germination percentage?
In brinjal, GA3 enhanced germination percentage over GABA and control. At 100 mgL-1, GA3 nave the highest percentage of seed germination of 15%, 28%, 63% and 95% after 24, 48, 72 and 96 hours of sowing, respectively (Fig. 1a).
What is the first thing that happens during germination?
The first stage of germination, called imbibition, occurs when the seed is exposed to water . The seed absorbs water though its seed coat. As this happens, the seed coat softens. Next, water triggers the seed to begin converting starch to sugar.
What are the environmental factors which affect germination?
Successful weed management in an agro-ecosystem requires knowledge of seed germination and emergence behavior, which is regulated by several environmental factors, such as temperature, light, soil salinity, pH, moisture, and burial depth (Chauhan et al., 2006.
How does the environment affect germination?
According to VCE Authors Diane Relf and Elizabeth Ball, “There are four environmental factors which affect germination: water, oxygen, light, and temperature .” Water is important because it brings the seed to life. ... Light, well, some plants like light during germination, and others don't.
Can we grow seed in complete darkness?
Seeds will not germinate so well in light as in darkness ; because light decomposes the carbonic acid gas, expels the oxygen, and fixes the carbon; thus hardening all the parts of the seed, and preventing vegetation.
What are the 4 factors that triggers seed germination?
Germination Factors for Seeds. Specific seed germination requirements vary depending on the plant species. But they generally include water, air, temperature, and ultimately access to light .
What are the causes of 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.
How does light affect germination?
As a generalisation, light in the red wave length usually promotes germination whereas blue light inhibits it. ... In such a case with a seed which required darkness, uncovered seed, which is exposed to light will not germinate. Sometimes only part of the seed is light sensitive.
