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Plant Growth Regulators and Seed Development Video Lecture | Biology Class 11 - NEET

FAQs on Plant Growth Regulators and Seed Development Video Lecture - Biology Class 11 - NEET

1. What are plant growth regulators and how do they affect seed development?

Ans.Plant growth regulators (PGRs) are chemical substances that influence the growth and development of plants. They play a crucial role in seed development by regulating processes such as germination, root growth, and flowering. By affecting hormone levels in plants, PGRs can enhance or inhibit seedling vigor, improve fruit set, and influence overall yield.

2. What are the different types of plant growth regulators?

Ans.There are several types of plant growth regulators, including auxins, gibberellins, cytokinins, abscisic acid, and ethylene. Each type has specific functions; for example, auxins promote cell elongation and root formation, gibberellins stimulate seed germination and stem elongation, while cytokinins promote cell division and shoot development.

3. How do environmental factors influence the effectiveness of plant growth regulators on seed development?

Ans.Environmental factors such as temperature, light, humidity, and soil conditions can significantly affect the effectiveness of plant growth regulators. For instance, higher temperatures may enhance the activity of certain PGRs, while inadequate light can hinder their effectiveness. Additionally, soil moisture levels can influence how well PGRs are absorbed and utilized by plants.

4. Can plant growth regulators be used to improve crop yield?

Ans.Yes, plant growth regulators can be used to improve crop yield. By optimizing hormonal balance in plants, PGRs can enhance seed germination rates, promote stronger root systems, and improve fruit set. This leads to healthier plants that are more productive, ultimately increasing crop yields.

5. Are there any risks associated with using plant growth regulators in agriculture?

Ans.While plant growth regulators can be beneficial, there are risks associated with their use, such as potential toxicity to non-target organisms, the development of resistance, and adverse effects on plant health if used improperly. It is essential for farmers to follow recommended guidelines and practices to minimize these risks and maximize the benefits of PGRs in agriculture.

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Sep 19, 2025 Last updated

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NEET Class 11

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