Life Cycle of Acrasis helenhemmesae and Oomycota

Questions and Answers

Cells of ______ align into chains.

sorogen

The uninucleate limax ______ has an obvious uroid.

amoeba

Mature sorocarp arranged as a ______ chain of spores.

uniseriate

Acrasis helenhemmesae is associated with a life ______.

cycle Signup and view all the answers

Two round ______ are scaled to G.

cysts Signup and view all the answers

Dictyostelia are common amoebae, mostly known from forest ______ and litter.

soil Signup and view all the answers

Acrasis spp. belong to the class ______, which is part of the Phylum Amoebozoa.

Dictyostelia Signup and view all the answers

Uniseriate sorocarps produce spores with prominent ______.

hila Signup and view all the answers

In cellular slime molds, the category that contains Acrasids is called ______.

Acrasiomycota Signup and view all the answers

The spore mass of A.rosea appears ______ 30 minutes after development.

amorphous Signup and view all the answers

The life cycle features a macroscopic, slimy, ______ phase.

amoeboid plasmodium Signup and view all the answers

These organisms are commonly found in soil, decaying wood, and other organic ______.

matter Signup and view all the answers

This requires two genetically compatible sexual ______ controlled by a one-locus, multiple allelic mating system.

gametes Signup and view all the answers

Myxomycetes can be kept as 'pets' in laboratories, feeding on bacteria and small ______ particles.

organic Signup and view all the answers

These sexual systems are found in ______ polycephalum, Didymium iridis, and Physarum pusillum.

Physarum Signup and view all the answers

Groups 1-3 retains the small, lateral ______ sorocarps from posterior of the ancestral survival strategy.

Dictyostelium-like Signup and view all the answers

This strategy is lost in Group ______, the most recently diverged group.

4 Signup and view all the answers

The ancestral survival strategy of terminal sorogen encystment of individual ______.

myxamoebae Signup and view all the answers

Acropetal formation of whorls of ______.

sorocarps Signup and view all the answers

Group 4 includes the model organism ______.

D.discoideum Signup and view all the answers

The pathogens infect seedlings at the base, causing them to collapse due to enzymatic degradation of ______ walls.

cell Signup and view all the answers

Control methods for damping-off disease include soil sterilization, ______ application, and careful management of watering practices.

fungicide Signup and view all the answers

Oomycota are commonly referred to as water molds and ______ rusts.

white Signup and view all the answers

Damping-off disease is primarily caused by ______ spp.

Pythium Signup and view all the answers

Examples of downy mildew diseases include Plasmopara viticola and Peronospora ______.

tabacina Signup and view all the answers

The impact of plant pathogenic oomycota affects a wide variety of ______, especially during the early stages of growth.

crops Signup and view all the answers

Oomycota include plant pathogenic organisms such as Saprolegnia and ______ mildew.

downy Signup and view all the answers

The life cycles of animal pathogenic and ______ pathogenic oomycota exhibit different characteristics.

plant Signup and view all the answers

Study Notes

Life Cycle of Acrasis helenhemmesae

Mature sorocarp forms a uniseriate chain of spores.
Development progress observed with changing structures in sorocarps within 30 minutes.
Spores exhibit prominent hila for attachment and release during the reproductive cycle.
Encystment occurs post-alignment of amoeboid cells, leading to spore formation.

Cellular Slime Molds (Phylum Amoebozoa)

Dictyostelia primarily inhabit forest soil and litter.
Sorocarps structure varies: some groups retain ancestral encystment strategies, while the most recent diverged group lacks this.
A notable model organism, Dictyostelium discoideum, showcases amoeboflagellate fusion resulting in a diploid plasmodium.
Dictyostelia possess diverse sexual reproductive systems based on mating-type compatibility.

Oomycota: Plant Pathogens

Saprolegnia identified as a significant pathogen affecting aquatic and plant life.
Damping-off disease, caused by Pythium spp., leads to seedling collapse due to enzyme-induced cell wall degradation.
Control measures include soil sterilization, fungicide application, and managing irrigation practices to minimize pathogen spread.
Downy mildew diseases like Plasmopara viticola and Peronospora tabacina have notable impacts on crops like grapes and tobacco, respectively.

Studying That Suits You

Use AI to generate personalized quizzes and flashcards to suit your learning preferences.

Description

Explore the fascinating life cycle of Acrasis helenhemmesae, including its reproductive strategies and the role of spores in its development. Additionally, learn about the impact of Oomycota on plant pathogens and the diseases they cause. This quiz delves into the complexities of cellular slime molds and their ecological significance.