The simplest way to understand the germination of seeds is to think of it as its transition from childhood into adulthood. The seeds grow or develop into plants. Seeds look like they have no life because, we as human beings tend to associate life with movement or some action. And seeds take quite a lot of time to germinate. It does not occur in the blink of an eye. Some seeds have the ability to germinate even after the seed has been dispersed 2000 years ago, while some need to germinate within 20 days or else they lose their ability to germinate. And a point to be noted is that not all seeds have the ability to germinate. Also for a seed to germinate it needs a trigger or something to get its metabolism started.
Basically after a seed reaches a certain location and is covered with dirt it can begin the process of germination. Now, the environmental conditions must trigger the seed to germinate. This depends on a lot of factors ranging from:
Process of Seed Germination
• Water: it is extremely necessary for the germination of seeds. Some seeds are extremely dry and need to take considerable amount of water, relative to the dry weight of the seed. But most seeds need enough water to moisten and not soak. It also leaches away a germinator inhibitor in the seed.
• Oxygen: It is required by the germinating seed for metabolism. It is used as a part of aerobic respiration until it manages to grow green leaves of its own. Oxygen can be found in the pores of sand particles, but if the seed is buried too deep it will be deprived of this oxygen.
• Temperature: This affects growth rate as well as metabolism of the seed. Quite obviously different seeds require different optimum temperatures.
• Light or darkness: This can act as an environmental trigger. Many seeds refuse to germinate until sunlight falls on them.
So to summarize, the process of seed germination, under the above mentioned favorable conditions, with suitable triggers the seed undergoes a rapid expansion growth of the embryo, culminating in rupture of the covering layers and emergence of the radical. This radical emergence is considered the completion of germination.
To learn more about the seed germination, please visit our web page or download the Byju’s app.
Practise This Question