Plant Physiology and Stress Responses

The video discusses how plants face biotic and abiotic stresses, which can significantly reduce yield. Abiotic stresses are the main cause of these losses. Under optimal conditions, plants perform photosynthesis, using nutrients and water transported by raw sap. In adverse conditions, plants close stomata to conserve water, affecting photosynthesis. Plasmolysis and hyperturgescence occur under dry and wet conditions, respectively. Lalstim Osmo, a foliar spray, helps regulate osmotic balance, enhancing plant resistance to stress.

What percentage of yield potential can be affected by plant stresses?

• Up to 100%

• Up to 70%

• Up to 50%

• Up to 90%

Which type of stress accounts for most of the yield losses in plants?

• Abiotic stress

• Mechanical stress

• Nutritional stress

• Biotic stress

What is the primary site of photosynthesis in plants?

• Stems

• Roots

• Flowers

• Leaves

What is the role of 'raw sap' in plants?

• Transporting oxygen

• Transporting water and nutrients

• Transporting carbon dioxide

• Transporting sugars

What happens to plant cells during plasmolysis?

• Cells become turgid

• Vacuole fills with water

• Vacuole empties water

• Cells undergo mitosis

How do plants respond to excess water conditions?

• Photosynthesis increases

• Vacuole empties

• Stomata close

• Vacuole fills up

What is the active ingredient in Lalstim Osmo?

• Potassium

• Phosphorus

• Nitrogen

• Glycine betaine

How long does the effect of Lalstim Osmo last?

• 3 to 4 weeks

• 1 to 2 weeks

• 5 to 6 weeks

• 7 to 8 weeks