Understanding Heat and Temperature Stresses: Impact of Biotic and Abiotic Factors on Living Organisms.pptx

This presantation explains the concept of heat and temperature stresses in living organisms. It shows how biotic and abiotic factors both affect the growth and health of plants and animals. The slides also discuse the reasons, effects, and preventions of these stresses in a simple way. My main aim is to spread awarness about how climate and environmental changes can harm life if not properly managed.

1. HEAT & TEMRATURE STRESSES PRESENTED TO DR. M.USMAN ASLAM PRESENTED BY Sadaqat Ali MSC(HONS) PLANT BREEDING & GENETICS

2. Types of stresses Biotic stresses Abiotic Stresses

3. Stress Any unfavorable condition which effect metabolism, development and growth of any living organisms.

4. BIOTIC STRESSES Biotic stresses in plants is caused by: Living organisms Microorganisms(Bacteria & fungal) Virus Insect

5. Abiotic Stresses Water Temperature Light Soil Nutrient

6. TEMPRATURE Temperature is a physical quantity that expresses the degree of hotness or coldness of a substance Or it is a Intensity of heat present in a substance or object.

7. TEMPRATURE LOW TEMPRATURE HIGH TEMPRATURE CHILLING FREEZING

8. Heat stress Rise in temperature beyond a threshold level for a period of time sufficient to cause irreversible damage to plant growth and development.

9. Heat Stresses Morphological physiological

10. morphological Scorching of leaves and twigs. Shoot and growth inhibition. Fruit discoloration and damage. Reduction in internodes lengths. Sunburns on leaves, branches and stems.

11. PHYSIOLOGICAL Disturbed leaves water relations. Decrease in root hydraulic conductivity. Increase transpiration which induce water deficiency.

12. COLD TEMPRATURE Chilling injury Freezing injury

13. Chilling injury The temperature lies below 15˚C. Ice crystal formation occur and cause death of plant. FREEZING INJURY The temperature lies below to 0˚C and also caused death of plant.

14. Management of Temrature stress(high temprature ) Use heat resistence varieties Straw mulching Seed priming Keep them constently moist Proper irrigation

15. Management of Temprature Stress(Low Temprature ) Use cold resistence varieties Applying biostimulants is also key to increasing crop resistance and helping them to overcome plant stress caused by cold temperatures amino acids provide the necessary boost to regulate the plant and maintain its growth process and the development of the plant's organs Change in gene expression

16. THANK YOU