Which one of the following plant pathogens has largest genome size?
Plant Pathogen Genome Size
The question asks to identify the plant pathogen among the given options that possesses the largest genome size.
Genome size refers to the total amount of DNA contained within one copy of a single genome. It is typically measured in base pairs (bp), kilobase pairs (kbp), or megabase pairs (Mbp).
Let's look at the approximate genome sizes of the pathogens listed in the options:
| Plant Pathogen | Approximate Genome Size (Mbp) |
|---|---|
| Ustilago maydis | ~20 |
| Fusarium graminearum | ~35-40 |
| Botrytis cinerea | ~40-50 |
| Phytophthora infestans | ~240 |
Comparing these values, we can see that Phytophthora infestans has a significantly larger genome size compared to the other pathogens listed. The large genome size of Phytophthora infestans is partly attributed to the expansion of repetitive DNA sequences and transposable elements.
Therefore, among the given options, Phytophthora infestans has the largest genome size.
Important Questions from Host parasite interaction
In what respect does the genome of slow-acting retroviruses differ from those of transducing viruses?
Listeria is a food-borne pathogen that causes mild gastro-intestinal symptoms. To move from one host-cell to another, it polymerizes actin into a comet tail like structure. Listeria can assemble host-cell actin at its rear end because:
A. Listeria has on its surface a protein called ActA
B. Listeria can activate Arp 2/3 complex
C. Listeria has on its surface γ-tubulin
D. Listeria has on its surface myosin II motor
Which one of the following options represents all correct statements?
Pathogens continuously evolve strategies to evade host immune responses. For each of the following evasion strategies (listed in column X) match the pathogen (listed in column Y) which adopts it:
Choose the correct matchColumn X Column Y A Changing the antigen expressed on their surface (i) Influenza virus B Increasing phagocytic activity of macrophage (ii) Neisseria C Developing resistance to
complement-mediated lysis(iii) Gram +ve
bacteriaD Secreting proteases to inactivate antibodies (iv) No bacteria
E Allowing point mutations in
surface epitopes resulting in
antigenic driftPR proteins play important role during plant-pathogen interactions. Column X represents some of the PR family proteins and column Y represents their main properties.
The correct match of column X with the property in column Y isColumn X Column Y A PR - 2 (i) Defensin B PR - 5 (ii) Thaumatin-like C PR - 12 (iii) Lipid transfer protein D PR - 14 (iv) β-1, 3 - glucanase Which of the following phytopathogens has predominantly necrotrophic mode of colonization?
