 Phylum：Chytridiomycota >> Class： Chytridiomycetes >> Order： Chytridiales |
||||
 BCRC Number： |
NO BCRC Number! | |||
| Scientific Name： |
Rhizophydium macrosporum | |||
| Author： |
Rhizophydium macrosporum Karling, Bull. Torrey. Bot. Club 64:439-442 1938. |
|||
| Description： |
On pine pollen: Sporangium usually sessile, epibiotic or interbiotic; spherical 18.3-23.3 μm diam., or ovoid 13 m (15-22) μm, with one to three (or more) apically or subapically exit papillae; discharge pore 3.33 μm diam. Rhizoidal system consists of an elongated tubular stalk or axis, 2.5-3.3 μm diam. giving the sporangium a distinctly stalked appearance. On 1/4YpSs agar: Sporangium spherical, 17.5-113 μm diam., oval or urceolate, with 1-5, but occasionally as many as 10 or more exit papillae. Rhizoidal system usually arising from one, occasionally several axes, delimited distinctly from the sporangia by a cross wall. Zoospores spherical, 4-5 μm diam., occasionally becoming amoeboid, with a large refractive globule, discharging simultaneously though several pores. Color of colony white. | |||
| Specimens： |
Taiwan. Yilan: Harpen, lake water, 13 Jan. 1993, NTNU 802b. Isolated on pine pollen from water. |
|||
| Habitat： |
Fresh water. | |||
| Distribution： |
USA, Taiwan. |
|||
| References： |
Chen, SF and Chien, CY. 1998. |
|||
| Provided： |
S. F. Chen |
|||
| Note： |
One or more of the exit papillae deliquesce simultaneously with 3-10 zoospores excaping into globules of hyaline fluid and lying quiescent for a few moments; as the globules dissolve, the zoospores begin to separate and soon dart away, others become actively motile; eventually some zoospores degenerate or germinate in situ; that is the main character for this species. | |||