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An obligate plant pathogen is an organism that causes disease in plants but cannot be cultured independently of its host plant (one cannot manufacture a growth medium in the lab that it can live on).
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What is elicitor in plants?
Elicitors are antimicrobial compounds produced in plant-pathogen interaction. When pathogen attack on the plant surface in response they produce elicitors.
The Ti plasmid from which plant pathogen is used to transfer plant genes between species?
Agrobacterium tumefaciens
Bacteria that only grows with the absence of oxygen?
Bacteria that can ONLY grow in the absence of oxygen are called obligate anaerobes.
What is an avirulent pathogen?
An 'avirulent' pathogen is a pathogen which is not virulent.This is similar to 'atypical' which means 'not typical'
How do obligate aerobes and obligate anaerobes differ?
Answerobligate aerobes require oxygen by using cellular respiration or fermentation in order to survive. obligate anaerobes do not require it and will die if they are exposed to oxygen.
Is a virus a proton a enzyme a pathogen or a antibiotic?
All viruses are obligate pathogens.
What is elicitor in plants?
Elicitors are antimicrobial compounds produced in plant-pathogen interaction. When pathogen attack on the plant surface in response they produce elicitors.
What is vector in plant pathology?
A vector is an organism that can carry pathogen(= disease causing organism) from infected plant to a health plant. Generally, a vector is an insect, a nematode, a fungi, or insect like organisms e.g. spider mites. To qualify as vector, the organism must have the ability to acquire the pathogen, must be able to retain the pathogen for some length of time and lastly it must be able to inject it into a suitable/susceptible plant. The relationships between the vector and pathogen can be described as simple if the pathogen does not circulate or replicate in the vector or complex if the pathogen replicates or circulate in the vector. In the latter case, the vector also acts as the host of the pathogen.
What is obligate species?
An obligate species is a species of plant or animal that has a narrow range of defines habitat. They may occur in a tree cavity, a wet meadow, or a rock cave.
What is an obligate species?
An obligate species is a species of plant or animal that has a narrow range of defines habitat. They may occur in a tree cavity, a wet meadow, or a rock cave.
The Ti plasmid from which plant pathogen is used to transfer plant genes between species?
Agrobacterium tumefaciens
What organism causes sudden oak disease?
oomycete plant pathogen
Which bacteria produces Yellow sulphur granules?
Actinomyces israelii is the classic pathogen that does this. It is a gram positive rod that forms branching filaments, resembling fungi. This little guy is an obligate anaerobe. Hope this helps!
What is hormonema dematioides?
a plant pathogen, causing reed needles of species af Abies
What has the author B A ROY written?
B. A. ROY has written: 'FLORAL MIMICRY BY A PLANT PATHOGEN'
In what ways does koch's procedure demonstrate the use of scientific methods?
Koch's Postulates (Procedures): Step 1. ASSOCIATION: The suspected pathogen must be consistently associated with the diseased plant (or animal). Step 2. ISOLATION: The pathogen must be isolated and grown in pure culture and its characteristics described. Step 3. INOCULATION: The pathogen from pure culture is inoculated into a healthy plant of the same species or variety and it must produce the same symptoms and signs. Step 4. RE-ISOLATION: The pathogen is re-isolated from the inoculated plant and its characteristics must be the same as the organism initially isolated in step 2. Ask a question- Is this a pathogen Do Research- find the suspected pathogen and isolate it and grow a pure culture Construct a Hypothesis- Test- Inject suspected pathogen into healthy organisms Analyze and Conclude- If suspected pathogen has produced same signs and symptoms in multiple tests on same organisms then it is indeed a pathogen Communicate Results
What is viriod?
a plant pathogen composed of molecules of naked RNA only several hundred nucleotides long.
