seed germination_2d72d5a7-122e-4bjs.pptx

The only thing that matters to me right about this is my y or I don’t want it happening to my kids or anyone else I just don’t want to have it happen again because it’s just a big part that I want to kabaisvso and the rest is my personal life I just don’t want it anymore and I’m just trying to be nice I just

1. Seed germination

2. Outline Objective Learning outcomes Definition of seed germination Essential elements for seed germination Seed germination test Types of seed germination 1

3. Objective To provide students with a basic understanding of the process of seed germination To identify the factors that affect seed germination To describe the different types of seed germination 2

4. Learning outcomes Students will be able to define seed germination Students will be able to know the factors that affect seed germination Students will be able to learn how to do a seed test 3

5. Parts of a seed

6. What is seed Germination Seed germination is the process by which a seed grows into a new plant. It is a complex process that is influenced by a number of factors, including water, temperature, oxygen, and light.

7. Essential elements for seed germination Water imbibition Temperature Oxygen Light 5

8. Changes during seed germaniton The physical changes include swelling of the seed after absorption of water through the micropyle . The water absorbed by the seed softens the seed coat and activates enzymes in the cotyledons Chemical changes. as the seed absorbs water, the food stored in the cotyledon or endosperm is hydrolysed into a soluble form. The stored food in the form of starch is converted into sugars by the enzyme called diastase. Then the growing seedling readily absorbs the dissolved stored food . Vital or Biotic changes 8

9. Types of seed germination • Epigeal germination In this, the cotyledons are raised out of the soil and generally become green and photosynthetic. In dicots , they are pushed up by quick extension of hypocotyl before growth of the epicotyl. 7

10. 8 Figure 4 : Epigeal germination

11. Hypogeal germination In this type of germination, the cotyledons remain underground. Hypocotyl growth is restricted . The epicotyl grows to raise the first leaves out of the soil. 9

12. 10 Figure 5 : Hypogeal germination

13. Figure:5 part of seed 11

14. Cont.…..

15. GERMINATION TEST 6 Figuer3: Germination test The Petri dish germination test is used for crops Seeds . The Petri dish contains a filter paper. Dishes are placed in seed germinator and normal germination is counted.

16. Germination percentage 17

17. Table : germination testing of field crops seed Final count days First count days Temp. C Crops 8 4 20 Wheat 7 4 20 Barley 7 4 20-30 Maize 14 5 20-30 Rice 10 5 20 Lens 8 5 20-30 Chickpea 10 5 20 Broad bean 10 4 20 Alfalfa 6 3 20-30 Sunflower 18

18. 15