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Question
Trichoderma harzianum is a useful microorganism for
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Solution
The correct option is B biological control of soilborne plant pathogens
Trichoderma is a genus of microscopic filamentous fungi which is widely distributed in soil. It is considered as an excellent biocontrol agent because of its ability to act against fungal plant pathogens such as Phythium, Phytophthora, Fusarium,etc.
Trichoderma employs several mechanisms to eliminate fungal pathogens in its habitat. Some of these include competition with the fungi for nutrients and space, parasitic action on the fungi, release of antibiotics and induction of the plant immune system.
Trichoderma harzianum is known to control the fungi Fusarium oxysporum by the mechanism of competitive exclusion. Competitive exclusion theory states that if two species compete for the same resources, the superior species eliminates the inferior species in the competition.
Trichoderma strains are well known for their ability to grow rapidly in the soil as they are naturally resistant to many toxic compounds. Thus, they easily colonise the soil and use up the resources depriving the fungi of space and nutrients. Eventuall the fungal species dies out.
Agrobacterium tumefaciens is a bacteria that is preferred for the transfer of genes in higher plants.
A stretch of barren land that is uncultivated is known as wasteland. Wasteland reclamation refers to the proper use of the barren stretch of land for some productive purposes. The Trichoderma species is not involved in this process.
Biofertilisers are living organisms which can increase the fertility of the soil by adding nutrients to it. Nitrogen fixing bacteria such as Rhizobium are used as biofertilisers. Trichoderma is not a biofertiliser.
Trichoderma is a genus of microscopic filamentous fungi which is widely distributed in soil. It is considered as an excellent biocontrol agent because of its ability to act against fungal plant pathogens such as Phythium, Phytophthora, Fusarium,etc.
Trichoderma employs several mechanisms to eliminate fungal pathogens in its habitat. Some of these include competition with the fungi for nutrients and space, parasitic action on the fungi, release of antibiotics and induction of the plant immune system.
Trichoderma harzianum is known to control the fungi Fusarium oxysporum by the mechanism of competitive exclusion. Competitive exclusion theory states that if two species compete for the same resources, the superior species eliminates the inferior species in the competition.
Trichoderma strains are well known for their ability to grow rapidly in the soil as they are naturally resistant to many toxic compounds. Thus, they easily colonise the soil and use up the resources depriving the fungi of space and nutrients. Eventuall the fungal species dies out.
Agrobacterium tumefaciens is a bacteria that is preferred for the transfer of genes in higher plants.
A stretch of barren land that is uncultivated is known as wasteland. Wasteland reclamation refers to the proper use of the barren stretch of land for some productive purposes. The Trichoderma species is not involved in this process.
Biofertilisers are living organisms which can increase the fertility of the soil by adding nutrients to it. Nitrogen fixing bacteria such as Rhizobium are used as biofertilisers. Trichoderma is not a biofertiliser.
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