In this article we will discuss about the life cycle of zoospores. Mycelium in Zoospores: The vegetative phase is variable. It ranges from a simple, unicellular thallus to an extensively developed, flamentous structure (mycelium) consisting of branched, coenocytic hyphae. The hyphae grow in and around the medium. The oomycete hyphal wall contains cellulose but no chitin. Glucans or mannans [...]
In this article we will discuss about the place of meiosis in oomycetes. It is still under dispute. Stevens as early as 1899 suggested gametangial meiosis in Albugo. His interpretation was disputed by later workers. Since then it has been widely held that the Oomycetes, as a whole, are haploid and meiosis occurs in the oospore. Sansome (1963) working with [...]
In this article we will discuss about the characteristics and classification of peronosporales. General Characteristics of Peronosporales: The order is represented by 12 genera and about 325 species. In habit they range from aquatic to the terrestrial ones through the species with amphibious way of life. Many of the terrestrial species are highly specialized obligate plant parasites which cause serious [...]