Botany Article Summary
In the article "The Microbial World: Fungal tip growth and hyphal tropisms" from the Institute of Cell and Molecular Biology, The University of Edinburgh, 1995, Jim Deacon explains hyphal tropisms. He explains hyphal tropisms by giving specific examples of plants that undergo this process. He also explains spore tropisms and the tropism of rust germ tubes.
A tropism is an orientation response of a hypha to an external stimulus. The first example given of a hyphal tropism is of a fungus like plant named Pythium aphanidermatum. The plant was allowed to germinate in water. On one side of the cyst clusters there was a nutrient rich agar block. The zoospore cysts in the plants of the oomycota group, like Pythium aphanidermatum, have fixed point of germination. As a result the you hyphae originally emerged and started growing in all directions but then reorientated and grew towards the nutrient rich agar. This tropism in a fungus-like group of plants is rare seeing as the......
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