Water molds asexual or sexual reproduction


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Water Mold comprise a taxonomic Class of protists that were originally believed to be a fungi, because of its close resemblance to mold. Scientists recently recognized it as having an independent lineage, separate from fungi. These two divisions include the Chytrids and the Oomycetes.

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Saprolegnia and Phytophthora: Oomycetes or Water Molds

The kingdom Fungi contains five major phyla that were established according to their mode of sexual reproduction or using molecular data. However, most mycologists have discontinued this practice. Rapid advances in molecular biology and the sequencing of 18S rRNA ribosomal RNA continue to show new and different relationships among the various categories of fungi. The five true phyla of fungi are the Chytridiomycota Chytridsthe Zygomycota conjugated fungithe Ascomycota sac fungithe Basidiomycota club fungi and the recently described Phylum Glomeromycota Figure.

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THE OOMYCOTA

They will see large hyphae, sporangia and swimming asexual spores zoosporesthe structures involved in sexual reproduction oogonia and antheridiaand how the shapes and sizes of these structures may vary among different kinds of oomycetes. Learners may then design their own biodiversity experiments to see if the use of different natural water sources, different kinds of soils, or different baits affect the variety of oomycetes baited. Water Molds Oomycetes. Materials List per group of students small jars with lids small glass or clear plastic dishes microscope slides, coverslips forceps, probes compound microscope, binocular dissecting microscope whole or cut fruit such as apple or pear popped popcorn kernels no butter or salt!

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Fry, William E. Introduction to Oomycetes. The Plant Health Instructor.