Prescott's Microbiology
Prescott's Microbiology
10th Edition
ISBN: 9781259281594
Author: Joanne Willey, Linda Sherwood Adjunt Professor Lecturer, Christopher J. Woolverton Professor
Publisher: McGraw-Hill Education
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Chapter 25, Problem 1CHI

Protist encystment is usually triggered by changes in the environment. Compare and contrast this with endospore formation in Gram-positive bacteria.

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Summary Introduction

A microbial cyst is a dormant or resting stage of microorganism, generally a protist or bacterium or rarely an invertebrate animal. It assists the organism to live in an unfavourable environment. Several protists are capable of encystment. The morphology of an organism becomes simpler and it matures into a resting stage is called cyst. 

Explanation of Solution

Encystment also assists the microbes to easily disperse from one host to another host and to favourable environmental conditions.

Comparison:

Generally, both encystment and endospore formation are triggered by starvation. Additionally, both cysts and endospores have strong and thick cell walls, low or no metabolic rate and it can live in harsh environments.

Contrast:

The formation of endospore takes place within the female gametophyte and it only disperses after the death of gametophyte. In encystment, any cell death cannot be caused by cell but it survives over unfavourable conditions. When compared to Gram-positive spores, the cysts of protist are less resistant to long environmental stress.

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Prescott's Microbiology

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