gemmule


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gemmule

[′je·myül]
(biology)
Any bud formed by gemmation.
(invertebrate zoology)
A cystlike, asexual reproductive structure of many Porifera that germinates when proper environmental conditions exist; it is a protective, overwintering structure which germinates the following spring.
(neuroscience)
A minute dendritic process functioning as a synaptic contact point.
References in periodicals archive ?
fragilis is well-suited for use in investigating these mechanisms because diapause in its gemmules is easily manipulated and is quite distinct from quiescence (Fell, 1987), a metabolically arrested condition promoted directly by environmental insult.
Finally, we measured ATP, ADP, and AMP in post-diapause gemmules to gain insight into the adenylate status during development.
Sorbitol levels determined by sorbitol dehydrogenase and expressed as micromoles per gram of fresh gemmule tissue ([micro]mol/gfw) declined rapidly in germinating gemmules - from a maximum of about 36 [micro]mol/gfw to a steady-state level of about 4 [micro]mol/gfw by 36 h [ILLUSTRATION FOR FIGURE 2 OMITTED].
During gemmule germination at 20 [degrees] C, activity increased dramatically to a maximum of 0.
The authors credit the abundance of sponges and corresponding gemmules to a seasonal remobilisation of silica fixed by the sponges and macrophytic vegetation of the previous season.
Unfortunately, these proposed gemmules were nowhere to be seen.
If pangenesis operated properly and the gemmules were transferred, he predicted that the offspring from those rabbits would not breed true.
Gemmules were lightly visible throughout the sample and were brown to black in color (Figure 1, left).
aspinosa was tentative, as gemmules are required for positive confirmation; and we could not find any.
Darwin had some famous misunderstandings due to the gaps in scientific knowledge in his time, for example his mechanism of inheritance via gemmules (Darwin, 1871), but Table 1 lists only content in the first edition of On the Origin of Species (Costa, 2009).
The minute message-carrying gemmules were thought to be released by all organs in the body (i.