Which one of the following bacteria is used for production of transgenic plants ?

Options

A. Escherichia coli
B. Pseudomonas
C. Staphylococcus aureus
D. Agrobacterium tumefaciens

Answer

To solve the question "Which one of the following bacteria is used for the production of transgenic plants?" we will follow these steps:

### Step 1: Understand the concept of transgenic plants
Transgenic plants are genetically modified organisms (GMOs) that have new traits introduced into them through recombinant DNA (rDNA) technology. This technology allows scientists to manipulate the genetic material of an organism.

**Hint:** Transgenic plants are created using genetic engineering techniques.

### Step 2: Identify the bacteria involved in the process
Among the options provided, we need to identify which bacteria is known for its role in the production of transgenic plants. The options given are:
- Ascaria coli
- Pseudomonas
- Staphylococcus aureus
- Agrobacterium tumefaciens

**Hint:** Look for a bacterium that is known for its interaction with plants and genetic modification.

### Step 3: Analyze the role of Agrobacterium tumefaciens
Agrobacterium tumefaciens is a soil bacterium that is well-known for its ability to infect a wide range of plants and cause tumorous growths, specifically crown gall disease. This bacterium has a special plasmid called the Ti-plasmid (tumor-inducing plasmid) that can integrate into the plant's DNA.

**Hint:** Consider which bacterium is known for causing diseases in plants and has a mechanism to transfer genetic material.

### Step 4: Understand the mechanism of transgenic plant production
The Ti-plasmid of Agrobacterium tumefaciens can be modified to remove the tumor-inducing genes and insert a gene of interest. When this modified plasmid is introduced into the plant, the desired gene can be expressed, leading to the creation of a transgenic plant.

**Hint:** Think about how scientists manipulate the genetic material of bacteria to achieve their goals in plant biotechnology.

### Conclusion
Based on the analysis, the correct answer to the question is **Agrobacterium tumefaciens**, as it is the bacterium used for the production of transgenic plants by facilitating the transfer of genetic material into plant cells.

**Final Answer:** Agrobacterium tumefaciens