ABSTRACT
Fungi are eukaryotic, spore-bearing achlorophyllous, heterotrophic organisms that generally reproduce sexually and asexually and whose filamentous, branched somatic structures are typically surrounded by cell walls containing chitin or cellulose or both with many organic molecules and exhibiting absorptive nutrition. Fungi take a very different approach to the cellular animals and plants, in that they build bodies from hyphal filaments. It is a long, tubular, thread like filamentous and branched structures of the eucarpic thallus. It comprises of an outer cell wall and a cavity lined with protoplasm. Typically, the lower fungi have faster rate of mycelial growth in vitro than higher fungi. Hyphae may be lying in between the cells (intercellular) or lying within the cells (intracellular) in host tissues. Fungal tissues are called plectenchyma i.e., mycelium becomes organized into loosely or compactly woven tissue. These tissues compose various types of vegetative and reproductive structures.
