Which one of the PGRs would be used by farmers if they are asked to ?

Options

A. a - auxins, b - ethephon, c - ethylene, d - GA, e - cytokinin
B. a - ethylene, b - GA, c - auxin, d- ethephon, e - cytokinin
C. a-auxin, b - ethephon, c - cytokinin, d - ethylene, e-GA
D. a - cytokinin, b - auxin , c - GA, d - ethephon, e - ethylene

Answer

To determine which plant growth regulator (PGR) farmers would likely use, we need to analyze the functions of the various PGRs mentioned in the video transcript. Here’s a step-by-step breakdown of the reasoning:

### Step 1: Identify the Plant Growth Regulators (PGRs)
The PGRs mentioned are:
1. Auxin
2. Ethephon
3. Ethylene
4. Gibberellic Acid (GA)
5. Cytokinin

### Step 2: Understand the Functions of Each PGR
- **Auxin**: Regulates and inhibits lateral growth of buds, promoting apical dominance.
- **Ethephon**: A source of ethylene that aids in fruit ripening and flowering induction.
- **Ethylene**: Promotes senescence (aging) and accelerates fruit ripening, enhancing market value.
- **Gibberellic Acid (GA)**: Stimulates cell division and elongation, promoting growth.
- **Cytokinin**: Promotes cell growth and division, enhancing root and shoot development.

### Step 3: Determine the Most Beneficial PGR for Farmers
Farmers typically seek PGRs that enhance crop yield, improve fruit quality, and facilitate harvesting.

- **Ethylene** is particularly useful for fruit ripening, which is crucial for market readiness.
- **Gibberellic Acid** is beneficial for overall growth and can help in increasing the size of fruits.
- **Cytokinins** are important for promoting growth but may not have as immediate an impact on market readiness as ethylene.

### Step 4: Conclusion
Considering the functions and benefits of each PGR, **Ethylene** would likely be the most commonly used PGR by farmers for its direct role in ripening fruits and enhancing their market value.

### Final Answer
The PGR that farmers would likely use is **Ethylene**.

---