One of the effects of Gibberellins is to induce the synthesis of amylase enzyme which causes the break down of starch and provides nourishment to the embryo in the seed. This phenomenon leads to the germination of seed. The hormone antagonist to this phenomenon is

Options

A. Auxins
B. Kinetin
C. ABA
D. Ethylene

Answer

To solve the question regarding the hormone that acts as an antagonist to gibberellins in the context of seed germination, we can follow these steps:

### Step 1: Understand the Role of Gibberellins
Gibberellins are plant hormones that promote growth and play a crucial role in seed germination. They induce the synthesis of enzymes like amylase, which break down starch into sugars, providing nourishment to the developing embryo within the seed.

**Hint:** Remember that gibberellins are associated with promoting growth and germination.

### Step 2: Identify the Process of Seed Germination
During seed germination, the stored starch in the seed is converted into sugars, which are essential for the growth of the embryo. This process is facilitated by gibberellins, indicating that they are essential for the initiation of germination.

**Hint:** Focus on the function of gibberellins in breaking down starch and supporting embryo development.

### Step 3: Determine the Opposing Hormone
The question asks for the hormone that acts as an antagonist to gibberellins. In plant physiology, certain hormones counteract the effects of growth-promoting hormones. One such hormone is abscisic acid (ABA), which is known to induce dormancy in seeds and inhibit germination.

**Hint:** Consider which hormones are known to inhibit growth and promote dormancy.

### Step 4: Analyze the Options
The options provided are:
- A) Auxins
- B) Kinetin
- C) Abscisic Acid (ABA)
- D) Ethylene

Among these, abscisic acid (ABA) is recognized for its role in promoting seed dormancy and inhibiting germination, making it the correct answer.

**Hint:** Look for the hormone that is commonly associated with dormancy and growth inhibition.

### Step 5: Conclusion
Based on the analysis, the hormone that acts as an antagonist to gibberellins in the context of seed germination is **abscisic acid (ABA)**.

**Final Answer:** C) Abscisic Acid (ABA)