list the conditions essential for germination of seed
Answers
Explanation:
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.
Answer:
The mature seeds germinate only on receiving suitable conditions of moisture (water), air (oxygen) and warmth (right range of temperature).
Moisture: Water
Moisture is essential for seed germination, because
• water softens the seed coat and makes it burst open for the radicle and plumule to come out.
• water activates the embryo to grow.
• water dissolves stored food and makes the enzymes to work upon the food so that it is available to the growing embryo.
Air: Oxygen
During seed germination energy is needed for growth and cell division. The energy is released by the oxident of food which in turn bneeds oxygen.
Warmth: Favourable Temperature
Some seeds do not germinate during summer. Similarly, seeds of summer flowers fail to germinate in winter. It means different varieties of seeds need different optimum temperature range. Seeds of summer plants like Rice, Maize, Millet, etc. grow in a temperature range of 25°C-40°C. Seeds of winter plants like Wheat, Gram, Bean, Pea, etc. germinate within the temperature range of 10°C-20°C.