from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A motile flagellated asexually produced spore, as of certain algae, oomycetes, and fungi.
from The Century Dictionary.
- noun In botany, a spore capable of moving about; a motile spore, or swarmspore.
- noun An animal spore; one of the minute flagelliform bodies which issue from the sporocyst of sporiparous animalcules; a swarm-spore.
- noun Also
from the GNU version of the Collaborative International Dictionary of English.
- noun (Bot.) A spore provided with one or more slender cilia, by the vibration of which it swims in the water. Zoöspores are produced by many green, and by some olive-brown, algæ. In certain species they are divided into the larger macrozoöspores and the smaller microzoöspores. Called also
sporozoid, and swarmspore.
- noun (Zoöl.) See
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun A
motile asexual sporeof some algaeand fungi.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun an asexual spore of some algae and fungi that moves by means of flagella
Sorry, no etymologies found.
Once the fish is dead, Pfiesteria reduces its toxin production and feeds on the fish remains either as a swimming stage called a zoospore or as other forms.
No. 4 represents a longitudinal section of Potato-stalk with germinating zoospore, the germ-tube of which has pierced the cell-wall, and is growing inside the cell, as shown at +.
Yet on the hypothesis of Pangenesis, the zoospore of an alga must contain gemmules from all the cells of the parent algæ, and from all the parts of all their less remote ancestors in all their stages of existence.
Rejuvenescence gives rise to a swarm-spore or zoospore.
The individual zoospore-like bodies, with two cilia throughout life, perforating the membranous coats, and by their conjoined action causing a free co-operative movement of the whole group.
It is remarkable that Mr. Darwin brings forward in support of gemmule fission, the observation that "Thuret has seen the zoospore of an alga divide itself, and both halves germinate."
Fig. 9 represents very probably one zoospore developed from these plants as figured from 10 to 16.
I have seen, however, in pui-e cultures of this form, abun - dant empty membranes with every appearance of having been cast oflf by a diplanetic zoospore (Fig. 118); but unfortunately, I have not observed the actual escape of the spores from them.
I have not followed the zoospore from its encystment to its germination; but, as the spores germinate freely in cultures which contain no trace of empty mem - branes, such as are seen with germinating diplanetic spores, there can be no doubt of their monoplanetism.
It is an interesting fact that this form of the zoospore corresponds with those of the related Peronosporacece. and with those of some of the Aacylistacece.