GCSE Biology - Plant Hormones - Uses of Auxin, Gibberellin and Ethene #53

The video tutorial explores the commercial applications of plant hormones: auxin, gibberellin, and ethene. Auxins are used to stimulate plant growth, aid in rooting, and act as selective weed killers. Gibberellin helps control seed dormancy, induce flowering, and increase fruit size, especially in seedless varieties. Ethene is crucial for controlling the ripening of fruits, allowing for better timing in transportation and sale. These hormones enable farmers to optimize plant growth and production cycles.

What is one of the primary uses of auxins in plant cultivation?

• To induce flowering in plants

• To stimulate root growth in cuttings

• To control the ripening of fruit

• To increase fruit size

How do auxins help in weed control?

• By preventing seed germination

• By disrupting growth patterns of broad-leaved weeds

• By promoting flowering in weeds

• By enhancing the growth of weeds

What is a significant benefit of using gibberellin in agriculture?

• It helps in the selective killing of weeds

• It enhances the production of ethene

• It allows for the growth of larger seedless fruits

• It prevents premature fruit ripening

Which condition can gibberellin help overcome to induce flowering?

• Non-ideal temperature conditions

• Inadequate water supply

• Lack of sunlight

• Excessive soil nutrients

Why is ethene important in the fruit transportation industry?

• It enhances the color of fruits

• It allows fruits to be transported while unripe

• It increases the nutritional value of fruits

• It prevents the growth of fungi on fruits