Lab__4_-_Fungi - Lab#4 The Water Molds and Fungi Autotroph...

Info icon This preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
Lab #4 – The Water Molds and Fungi. Autotroph and Heterotroph Associations Carolyne Moussa
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Microscopic Technique - Connect compound and dissecting microscopes via firewire cables to the computer BEFORE opening Image-Pro Express. - http://salinella.bio.uottawa.ca/BioLabo/
Image of page 2
Kingdom Protista - Unicellular Protists - Two different types are Oomycota and Myxomycota: Fungus-like protists that have the appearance and some basic characteristics of fungi, but are more closely related to the protists in their reproduction and life cycle. 1. Phylum Oomycota (The water molds) – Saprolegnia sp. -. Most species are saprophytic () but there are a few that are parasitic on fish and other animals. -. Has hyphae (cottony mass of filaments) which collectively constitute a mycelium. -. The hyphae are coenocytic meaning that they are without partition and are thus multinucleate. -. The denser areas at the tips of many of the hyphae have individual cells called sporangia (or zoosporangia ) and these cells play a role in the production of asexual motile spores (zoospores). -. If a zoosporangium is ready to discharge, its spores will contain clearly formed zoospores that are rocking back and forth. -. This genus exhibits heterogamy and produces gametes that are male and female. -. The female gametangia or sex organ is the oogonia and has eggs within it. Some oogonia should have antheridia next to them. -. Antheridia is the male gametangia. -. Oogonia and antheridia are both single-celled structutres, but oogonia is several times larger than the antheridia. -. Fertilization: male nuclei from the antheridia fuse with eggs within the oogonia
Image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Sex Organs Eggs – Oospores Oogonium Antheridiu m Q: Plant diseases caused by oomycetes? A: Potato blight & Tomato late blight Root rot of soybean Black pod of cocoa Blue mold of tobacco
Image of page 4
2. Phylum Myxomycota (The slime molds) – Physarum sp.
Image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Kindom Fungi 1. Phylum Zygomycota (Black Bread Molds) -. Distributed worldwide with airborne spores found almost everywhere. -. Bakeries add preservatives (calcium propionate) to prevent growing mold on bread. -. Filamentous mycelium is coenocytic (multinucleate) & nonseptate ( no cross walls). -. When a spore lands on a suitable substrate, it germinates and forms a very extensive coenocytic mycelium, whose mat consists mostly of vegetative hyphae, which primarily absorb nutrients from the environment supporting the growth of new hyphae, reproductive spores and sexual spores.
Image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern