• Drought has several negative consequences on plant life. Firstly, it can lead to wilting and death of plants due to lack of water for photosynthesis and nutrient absorption. Drought stress can also cause reduced growth and development, as well as decreased seed production and poor crop yields. Additionally, drought can make plants more susceptible to diseases and pests, as their defense mechanisms are weakened.
• Abscisic acid (ABA) is a hormone produced in plants that plays a crucial role in protecting them against drought. When plants experience drought, ABA is synthesized and induces various responses to conserve water and limit water loss. It does so by reducing the rate of transpiration, closing stomata to minimize water evaporation, and promoting root growth to enhance water uptake. ABA also promotes the synthesis of protective proteins and antioxidants, which help the plant withstand drought stress and prevent damage.
• Knowledge about ABA and its role in drought tolerance can significantly improve crop production. By understanding the mechanisms by which ABA protects plants against drought, scientists can develop strategies to manipulate ABA levels in crops to enhance their drought tolerance. This can be achieved through conventional breeding methods or genetic engineering, where genes responsible for ABA synthesis or ABA signaling pathways can be manipulated. By developing drought-tolerant crop varieties, farmers can minimize losses in crop productivity during drought conditions, ensuring food security in regions prone to water scarcity.
• Briefly discuss the consequences of drought on plant life.
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• How does abscisic acid protect plants against drought?
(10)
• How can knowledge about ABA and its role in drought
tolerance improve crop production? (3
1 answer
3 answers