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Select the incorrect statement from the ...

Select the incorrect statement from the following.
(a) Rhizobium multiply and colonises the surroundings of roots and gets attached to epidermal and root hair cell.
(b) Successful infection of the root hair causes it to curl .
(c) The nodule establishes a direct Vascular connection with the host .
(d) Infection thread carries the bacteria to xylem and phloem .

A

Rhizobium multiply and colonises the surroundings of roots and gets attached to epidermal and root hair cell.

B

Successful infection of the root hair causes it to curl .

C

The nodule establishes a direct Vascular connection with the host .

D

Infection thread carries the bacteria to xylem and phloem .

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question, we need to analyze each statement regarding Rhizobium and its interaction with plant roots: 1. **Statement (a)**: "Rhizobium multiply and colonises the surroundings of roots and gets attached to epidermal and root hair cell." - This statement is correct. Rhizobium bacteria do multiply in the soil and attach to the root hairs of legumes. 2. **Statement (b)**: "Successful infection of the root hair causes it to curl." - This statement is also correct. When Rhizobium successfully infects a root hair, it induces the hair to curl, facilitating the infection process. 3. **Statement (c)**: "The nodule establishes a direct vascular connection with the host." - This statement is correct as well. The root nodules formed by Rhizobium do establish a vascular connection with the host plant, allowing for nutrient exchange. 4. **Statement (d)**: "Infection thread carries the bacteria to xylem and phloem." - This statement is incorrect. The infection thread does not carry bacteria to the xylem and phloem; instead, it carries the bacteria into the inner cortex and pericycle of the root. Based on this analysis, the incorrect statement is **(d)**. ### Final Answer: The incorrect statement is (d) "Infection thread carries the bacteria to xylem and phloem."
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