Germination Of A Bean Seed

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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