Multiple choice

Clavibacter michiganensis subsp. sepedonicus causes ring rot in potatoes. It resides in which of the following during the first stage of invasion?

  1. Plant leaves

  2. Xylem vessels

  3. Phloem vessels

  4. Parenchymatous tissue
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

In the first stages of invasion, Clavibacter michiganensis resides as a biotrophic pathogen in the xylem vessels. They multiply by binary fission inside the vessel and establish colony there. If colonisation is successful, they may plug the xylem vessels.

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