What's the difference between prothallium and prothallus?
Prothallium
Definition:
(n.) Same as Prothallus.
Example Sentences:
Prothallus
Definition:
(n.) The minute primary growth from the spore of ferns and other Pteridophyta, which bears the true sexual organs; the oophoric generation of ferns, etc.
Example Sentences:
(1) In the light two-dimensional growth occurs which results in a heart-shaped prothallus one cell thick.
(2) This led us to model the morphogenesis of the prothallus.
(3) Furthermore, the pattern of plasmodesmata distribution is predictable so that (1) we can identify the apical meristematic cells by their plasmodesmata number, or density, as well as by their size, shape and location, (2) we can predict, again from plasmodesmata number, the location of a future wall of the apical cell prior to its actual formation, (3) we can show that the density of plasmodesmata in the triangular apical cell of the prothallus (14 plasmodesmata microns-2) is comparable to those reported for secretory glands which are known to have high rates of plasmodesmatal transport and (4) we can show that once the plasmodesmata have been formed during division, no subsequent change in the number of plasmodesmata occurs following cell plate formation.
(4) As the prothallus grows the number of plasmodesmata increases 50-fold in the apical or meristematic cell.
(5) the transition from the tip-growing filament to the planar prothallus.