How many of the following statements is/are correct?
I.Soil microbes weakens the seed coat and promotes germination
II.Scarification is the process of breaking seed coat
III.Rainwater leaches off chemical inhibitors from the seed
IV. Chilling the seed will promote seed germination
The action of soil microbes weakens the seed coat and promotes germination.
Mechanical abrasions can also break the seed coat barrier in some seeds. This process is called scarification. Scarification can be done using knives, sandpaper, vigorous shaking, the action of harsh chemicals like strong acids, and sometimes even just hot water.
In a natural environment, chemical inhibitors that induce dormancy are often leached off (drained away) from the seed by the action of rainwater.
In nature, seeds often go through cold and moist conditions in winter and then germinate in the spring. This condition can be simulated artificially by chilling the seeds in the refrigerator for several weeks. The seeds will then be ready to germinate.