00:01
In the given problem, we will be talking about different stems is a modification.
00:04
So what are stems? stems represent the ascending part of a plant that wears branches of leaves, fruits, and flowers.
00:13
Now, it develops from the plume of the embryo of a developing seed.
00:20
Now, stems are usually ascending.
00:23
However, they might not always be typically what they are expected to be, and they might modify to perform different functions.
00:32
Now what are various types of modifications that we see in stems? first is the underground stems.
00:44
Now the main function of these stems is in storage, storage of food.
00:50
Some examples include rhizome, coms and tubers.
01:01
Now rhizomes are the stems, underground stems that are seen in ginger and banana.
01:11
Corns are the underground steps of colacasia.
01:19
Sorry, it is colocacia.
01:23
And the rhizomes and coms are the underground stems that are modified for the purpose of storage of food.
01:35
Also, these stems help in vegetative propagation of these plants.
01:40
So they have a function in storage of food and vegetative propagation.
01:44
Of reproduction.
01:46
Now potato is a tuber.
01:48
So example of tuber is potato.
01:51
So potato is a tuber that helps in the storage of food and bears eyes on it.
01:56
Now, subtended by a leaf scar, these eyes bear axillary birds that give rise to a new plant.
02:02
So another example of an underground stem is tuber or which is found on potatoes.
02:09
This is the first modification of stems.
02:12
Now coming on the second type of modification.
02:16
Now second type of modification is supportive stems...