Table of Contents
How many stages of life does slime mold have?
Dictyostelium, a common cellular slime mold, goes through three life cycle stages: individual, colony, and spore (Figure 17-10). Most of the time, this organism exists as solitary amoeba-like cells. These cells are haploid. They use pseudopodia to creep about and engulf bacteria and other food.
Where do plasmodial slime molds live?
They feed on microorganisms that live in any type of dead plant material. They contribute to the decomposition of dead vegetation, and feed on bacteria, yeasts, and fungi. For this reason, slime molds are usually found in soil, lawns, and on the forest floor, commonly on deciduous logs.
Are slime molds plasmodial?
There are two types of slime mold: cellular and acellular (plasmodial). During the life cycle of cellular slime molds, they remain as single cells.
Do plasmodial slime molds release spores?
Under favorable conditions, plasmodial slime molds reproduce by forming a reproductive stalk containing spores. This reproductive stalk looks spherical or even popsicle-like on top. When the time is right, these stalks will release the spores and new slime molds will proliferate.
What is the life cycle of mold?
The life cycle of mold can follow different patters. A common, 4 step, life cycle for mold is: Spore, Germ, Hypha, and Mature Mycelium. 1. Spore: Spores are released from mature mycelia through spore liberation, the process by which spores break off, or detach, from the structure that germinated the spores.
What are the differences between plasmodial and cellular slime molds?
The main difference between plasmodial and cellular slime molds is that the plasmodial slime molds or the acellular slime molds are the bags of cytoplasm with thousands of individual nuclei, whereas the cellular slime molds live most of their lives as unicellular protists.
How long does it take for slime mold to grow?
Within 24–48 hours, the plasmodial slime mold will begin to spread across the surface of the filter paper and engulf the oat- meal.
What is the purpose of the plasmodial stage?
Plasmodial slime molds Upon maturation, the plasmodium takes on a net-like appearance with the ability to form fruiting bodies, or sporangia, during times of stress. Meiosis produces haploid spores within the sporangia. Spores disseminate through the air or water to potentially land in more favorable environments.
Which structure of a plasmodial slime mold produces spores?
sporangium
When it dries out or runs out of food, it begins to make fruiting structures called sporangia (sporangium, singular). Inside these sporangia, the diploid nuclei will undergo meiosis and haploid nuclei will be walled off to make spores for aerial dispersal.
How many nuclei do plasmodial slime molds have?
Inside the sclerotium, the plasmodium divides into “cells”, each containing from 0 – 4 nuclei. The cell-like structures which contain nuclei can grow into new plasmodia when moisture and temperature conditions improve.
What is the major difference between cellular and plasmodial slime mold behavior?
Cellular Slime Mold Reproduction: There is one relatively major difference between cellular and plasmodial reproduction, cellular slime molds all remain individual cells with one nucleus; whereas plasmodial slime molds are one huge cell with millions of nuclei.
What is the lifespan of mold spores?
Spore Dispersal: After the spores form, they are released into the air and carried elsewhere to begin the process of germination, and begin the cycle anew. Mold spores are highly resistant and durable; they can survive in a dormant state for years in both hot and dry environments.
Which of the following is a distinguishing feature of the cytoplasm of a plasmodial slime mold?
Which of the following is a distinguishing feature of the cytoplasm of a plasmodial slime mold? It exhibits conspicuous back-and-forth streaming. Select all features of the feeding phase of a plasmodial slime mold.
How do you keep slime mold alive?
The slime mould Physarum polycephalum is very easy to keep, it’s harmless and undemanding, it can live on a sheet of kitchen towel in an old margarine tub and needs just oats for food.
What does plasmodial mean?
plas·mo·di·a (-dē-ə) 1. A multinucleate, often large mass of protoplasm that moves and ingests food and is characteristic of the vegetative phase of plasmodial slime molds. 2. Any of various protozoans of the genus Plasmodium, which includes the parasites that cause malaria.
Is plasmodial slime mold photosynthetic or heterotrophic?
Myxomycetes plasmodia (slime molds) are heterotrophic organisms that were once regarded as fungi but later on they were classified with the Protista.