About Lesson
Rate of Growth in a Root
It is determined by taking a young seedling whose radicle is then marked with the Indian ink at intervals of 2 mm.
The seedling is left to grow for about 24 hours and then the ink marks are examined.
When the distance between successive ink marks are measured, it is found that the first few ink marks, especially between the 2nd and 3rd mark above the tip of root have increased significantly.
This shows that growth has occurred in the region just behind the tip of the root.
The difference between the length of each interval and the initial interval of 2 mm gives the increase in the length of that interval during that period of time.
Hence, rate of growth can be calculated as:
Join the conversation
