There is a single class, Oomycetes, which is further divided into 7 orders. We shall study some genera belonging to the orders Saprolegniales, Pythiales and Peronosporales. Order Saprolegniales (Water Molds): The term 'water molds' is generally used for genera belonging to this order. The zoospores are formed in zoosporangia. A peculiar feature of this order is the production of two [...]
In this article we will discuss about reproduction of fungi in phylum oomycetes. Reproduction in Saprolegnia: Asexual Reproduction: It is accomplished by zoospores. Cylindrical zoosporangia develop at the tips of hyphae which produce numerous biflagellate zoospores. When mature, they can be seen jostling one another within the zoosporangium. The apex of the zoosporangium suddenly breaks releasing the zoospores. At first, [...]
In this article we will discuss about:- 1. Heterothallism in Fungi 2. Heterokaryosis in Fungi 3. Parasexuality. Heterothallism in Fungi: A. F. Blakeslee, an American Geneticist, in 1904 made an important observation with Mucor, which resulted in the discovery of Heterothallism. Blakeslee observed, that while some isolates of Mucor formed sporangia as well as zygospores (e.g., M. tenuis), some others [...]