Germination Of A Bean Seed
Transcript
00:00hi kids today we will learn how does a seed grow into a new baby plant or seed
00:09germination so let's start germination is the growth of a seed into a seedling
00:18or a small baby plant
00:23the period for which the seed remains inactive or the period before the growth
00:30of a seed into a new baby plant is called its dormant period or an inactive
00:38state of seed is dormant period and it can range from a number of days months
00:45or even years a seed does not germinate until it gets all the suitable
00:52environmental conditions
00:56these are some requirements that must be met before the seed starts to germinate
01:03seed require enough moisture warmth air and sunlight to germinate moisture or
01:11water is required for the seed to break its hard protective shell that is testa
01:20some seeds need sunlight to for germinating
01:26while some seeds only need warmth air and moisture today we will learn how a
01:34bean seed germinates firstly a bean seed absorbs water through the micro pile and
01:44opening in testa just above the hilum and when the seed swells due to
01:51absorbing moisture it's hard seed coat or testa breaks and gives way for the
01:57embryo or the small baby plant to come out embryo in the seed has two parts
02:06radical and plume you'll the part that grows into root is called radical the
02:16part that grows into the shoot or stem is called plume you'll first of all the
02:23radical starts to grow and pushes down into the soil and forms the root of the
02:30new baby plant and then the mule grows upwards and forms the shoot of the plant
02:38this is testa or seed coat that is withering away from the baby plant these
02:48are cotyledons or seed leaves they will also wither away when the baby plant
02:55will grow now the plume you'll grows and forms new green leaves and the seed
03:06leaves or cotyledons sheds off and our new baby plant has grown by now with
03:14small roots small stem and one or two fresh green leaves now this small baby
03:21plant can produce its own food through photosynthesis now let's revise what we
03:28learned we learned a seed required enough moisture warm air and sunlight
03:38to germinate a bean seed absorbs water through the micro pile and opening in
03:45the testa just above the hilum and when the seed swells due to absorbing
03:50moisture it's hard seed coat or testa breaks and gives way for the embryo or
03:57small baby plant to come out radical starts to grow and pushes down into the
04:04soil and forms the root of the new baby plant and then plume you'll grows
04:11upwards and forms the shoot of the plant now the plume you'll grows and forms new
04:19leaves and the seed leaves or cotyledons sheds off and our new baby plant has
04:28grown by now with small roots small stem and one or two fresh green leaves now
04:35this small baby plant can produce its own food through photosynthesis now you
04:41may go ahead and take a quiz to learn more bye-bye