This document discusses the effects of abiotic stresses like drought and temperature on fodder crops. It defines abiotic stress and examines the impact on pulses. A large fraction of the world's arable land is affected by abiotic stresses. The types of abiotic stresses include water stress and temperature stress, with the latter causing damage through ice formation, heat shock, and moderate heat above optimum temperatures. High temperatures can also potentially damage photosynthesis. The document concludes that abiotic stresses impact important physiological, biochemical and yield-related factors in crops.

2. Abiotic stresses and their effects on
fodder Crops (Drought & temperature)
Presented by :
Zeshan Haider
Department:
Centre of Agricultural Biochemistry & biotechnology

3. What is stress?

4. Abiotic stress

5. Impact of Abiotic stress on pulses

6. Fraction of world’s arable land affected
with Abiotic stress

7. Types of abiotic stress

8. Water Stress

10. Temperature stress

11. Damage to membrane and cell due to ice formation

12. Heat stress
• Two types of heat stress according to the interaction of
time and temperature
(i) Heat shock
• Lethal temperatures from a few minutes to a few hours
(ii) Moderate heat
• higher than optimum temperatures during the growing
season

13. Potential damage of photosynthesis due to
high temperature

14. Conclusion
The abiotic stresses are governed by the important physiological,
biochemical and yield contributing factors such as
• photosynthetic rate
• relative water content
• membrane injury index
• plant height
• flower drop
• root : shoot ratio
• specific leaf area
• chlorophyll content
• drought susceptible index
• drought tolerant efficiency
• protein.