Tag: useful and harmful microbes
Questions Related to useful and harmful microbes
VAM is
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Bioinsecticide
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Bioherbicide
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Endomycorrhiza
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Ectomycorrhiza
In what way does a fungus growing around the roots of higher plants benefit them?
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It products antimicrobial substances
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It produces growth promoting substances
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It helps in absorbing water nitrogen and other minerals
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All of them
Mycorrhiza acts as
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Mechanical tissue
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Root hair in adverse conditions
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Modified root
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Organ for vegetative propagation
The symbiotic association between fungi and roots of higher plants is referred to as:
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lichen
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mycorrhiza
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biofertiliser
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biocontrol agent
- The symbiotic association between fungi and roots of higher plants is referred to as mycorrhiza.
- The plant supports the fungus by providing carbohydrates needed for fungal growth, while the fungus helps the plant by increasing its root surface area.
- So, the correct answer is 'Mycorrhiza'.
Select correct statement w.r.t. mycorrhiza
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Ectomycorrhiza forms hartig net in the intracellular spaces of cortex cells
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Endotrophic mycorrhiza are mostly basidiaamycetes members
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VAM is a special type of endomycorrhiza and absorbs phosphate
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Mycorrhizal or fungal roots have root cap and root hairs
- The ectomycorrhiza's hyphae does not penetrate the cortex cells and they only colonize in the intercellular spaces between them, and this network of hyphae are called as hartig net. So, the first statement is correct.
- The endotrophic mycorrhiza are a type of arbascular mycorrhiza.
- Vesicular arbascular mycorrhiza help the plants to grow well by colonizing their roots and helping them to efficiently absorb the phosphate in the soil.
- So the correct option is 'VAM is a special type of endomycorrhiza and absorbs phosphate'.
Which one of the following is a useful functional association between fungi and the roots of higher plants?
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Lichen
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Coralloid root
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Biofertilizer
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Mycorrhiza
Mycorrhiza is a useful functional association between fungi and the roots of higher plants in which fungi absorb nutrients from the soil as their roots are not such strong and the tree provides food to the fungi. The best example is Orchid mycorrhiza
Glomus sp., which involve in mycorrhizal association belongs to
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Ectotrophic mycorrhiza
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Endotrophic mycorrhiza
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Parasitic fungus
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Cyanobacteria
VAM (Vesicular-arbuscular mycorrhizae) represents
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Saprophytic bacteria
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Symbiotic fungi
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Saprophytic fungi
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Parasitic algae
Mycorrhiza biofertilizer is also known as VAM, adheres to plants rhizoids leading to development of hyphae. Hyphae boost development and spreading of white root in to soil leading to significant increase in rhizosphere. These hyphae further penetrate and form arbuscules within the root cortical. VAM fungi form a special symbiotic relationship with roots of plant that can enhance growth and survivability of colonized plants. Mycorrhiza biofertilizer is very useful in organic farming as well as normal commercial farming. So, VAM is a symbiotic fungi and not a parasitic algae, saprophytic bacteria and saprophytic fungi. Thus, the correct answer is option B.
Mycorrhizae are the example of
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Amensalism
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Antibiosis
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Mutualism
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Fungistasis
Which of the following pairs is mismatched?
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Azospirillum - Maize
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Mycorrhiza - Pine
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VAM - Mycoherbicide
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Rotenone - Natural insecticide
Azospirillum inoculations are recommended mainly for sorghum, millets, maize, sugarcane and wheat.
Mycorrhizal biofertilizers can be used for pine trees.
Rotenone is an odourless, colourless, crystalline ketonic chemical compound used as a broad-spectrum insecticide, piscicide, and pesticide. It occurs naturally in the seeds and stems of several plants, such as the jicama vine plant and the roots of several members of Fabaceae.
VAM is a biofertilizer and not a mycoherbicide.