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#1
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spore propagation
I am looking for information on evolution of sporing plants (ferns,
mosses, mushrooms) on land. We have both fossils and living representatives of flowering plants having different means of propagating their seeds and increase success rate of their seeds. The surviving sporing plants that we know seem to have a monotonous history, that means Throw spores in the air and let chance do it's task but was it always like that ? For example, were spores always very small, or were some of them bigger and had a greater reserve of food and water for dry climate ? Do we have fossilized records of spores being swallowed by grazing animals and made benefit from the animal manure for a better success in germinating ? (Just like many plants which make an edible fruit for propagating seeds that way, although fruits in sporing plants might be absent.) |
#2
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spore propagation
If you can, find a book called The Biology And Evolution of Fossil
Plants by Taylor and Taylor. It and a basic plant physiology text may well answer many of your questions. Even many early/lower plants were/are more complex than "throw it in the air." For example, bryophytes show alternation of generations--the spores may well be wind-dispersed, but the sperm of the sexual generation needs water to swim to the egg. Colonization of drier environments did require larger propagules with a reserve of food and moisture--seeds. That's where "seed ferns", gymnosperms, and flowering plants come in. The Taylor text discusses all sorts of entities with no modern analogs, so you may find something less "boring" than modern plants. M. Reed Gabriel wrote: I am looking for information on evolution of sporing plants (ferns, mosses, mushrooms) on land. We have both fossils and living representatives of flowering plants having different means of propagating their seeds and increase success rate of their seeds. The surviving sporing plants that we know seem to have a monotonous history, that means Throw spores in the air and let chance do it's task but was it always like that ? For example, were spores always very small, or were some of them bigger and had a greater reserve of food and water for dry climate ? Do we have fossilized records of spores being swallowed by grazing animals and made benefit from the animal manure for a better success in germinating ? (Just like many plants which make an edible fruit for propagating seeds that way, although fruits in sporing plants might be absent.) |
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