They are present in the earliest plant fossils and it is suspected that they evolved at a time when the Earth's soil was poor in nutrients. The nodulin genes activated during the early stages of nodule formation are the same genes that are activated during the development of their endo type, in which case a dense mantle forms over the surface of the root. In the more common ecto type, the mantle is absent and the hyphae extend inward by digesting small patches of the root cell walls. In either case, the plant benefits f
They are present in the earliest plant fossils and it is suspected that they evolved at a time when the Earth's soil was poor in nutrients. The nodulin genes activated during the early stages of nodule formation are the same genes that are activated during the development of their endo type, in which case a dense mantle forms over the surface of the root. In the more common ecto type, the mantle is absent and the hyphae extend inward by digesting small patches of the root cell walls. In either case, the plant benefits from increased water uptake, while the fungus receives a steady supply of sugars. An example of mutualism, FTP, identify this entity formed by the symbiosis of plant roots and fungi.
They are present in the earliest plant fossils and it is suspected that they evolved at a time when the Earth's soil was poor in nutrients.
mycorrhizae