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Spore Germination Questions

Question 1

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Answer 1

Most spores germinate when moist conditions prevail. Free water enters the spore, causing initiation of metabolic processes that transform stored energy for use in growth and development.

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Question 2

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Answer 2

Lack of germination may be caused by unsuitable environmental conditions such as low temperature, even in the presence of free water, physiologically immature spores, or dormancy.

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Question 3

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Answer 3

Dormant spores enable a fungus to pass through conditions which are not conducive to survival as a thallus. These might be periods of dryness, low temperatures or high irradiation. Dormant spores are usually produced at the same time as spores which lack dormancy so a variety of germination conditions enable the fungus to colonise over a long time period. Overall, dormancy in spores provides a fungus with a greater chance of survival.

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Question 4

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Answer 4

Dormancy appears to be associated with cytoplasmic or wall-bound factors. The factors either prevent imbibation, metabolic activity or movement of germination factors to a site of activation.

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Question 5

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Answer 5

 

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Question 6

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Question 7

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Answer 7

 

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