A Móra Ferenc Múzeum Évkönyve, 1968. (Szeged, 1968)

Gallé, László: The xerothermic lichen species cladonia magyarica VAIN

(3) The intensity of development of the gonidia grown in the same soil concoction and DETMER's culture medium is identical. (4) The gonidium algae originating from two different localities have shown a granulation of different colour and different fineness in culture media of different composition. (5) The gonidia are developing in a culture fluid with greater intensity than in a solid culture medium. That is connected - in all probability - with the physical condition of the medium. In a solid culture medium the shape of cultures is regular. (6) The introductions made of bred are developing faster than the primary cultures originating from a lichen thallus. It is demonstrated by this fact that the gonidium alga - after some generation - is accommodating itself well to the artificial conditions. The results of the microscopic investigatons have been: (1) The alga cells developed in the cultures are spheric or somewhat oval, their size being 6-8 X 10-14 ;

u, their wall thickness 0,8 ju. (2) The chromatophore of the algae is of central site, of lobate edge, of yellowish-green (Code des Couleurs: Vert No. 306) colour. (3) The alga cells are containing a great lot of oil stained well by Sudan III. (4) The pyrenoid that shows also a weak starch reaction may hardly be seen in the cells grown in a medium sugared; it is, however, to be demonstrated easily in the cells developed in a culture medium without sugar. (5) The alga cells are mononuclear. (6) The gonidia are multiplying with autospores or gametes. The gonidium alga of lichens belonging to the genus Cladonia is classified by R. CHODAT into the genus Cystococcus and bescribed by the name of Cystococcus Cladoniae CHOD. Similar observations have been made by O. JAAG and F. ELVING, as well. The gonidium alga of Cladonia magyarica is differring from that of CODAT's plant both „in situ" and in the cultures, too. Therefore, for making a distinction, we have specified the gonidium alga of Cladonia magyarica by the name of Cystococcus cladoniae magyaricae. Its description is as follows: The cells are approximatively spheric or somewhat oval, their size being 6-8X10-14 and the thickness ot their walls, 0,8-0,9 /л; they take place in irregular cell clusters. In the algal cells there is generally one colour body, rarely there are two or three of them, being of laced edge and taking place in the middle of the cell. In each of the coloured bodies there can be found a pyrenoid. The multiplication is happenning by autospores and isogametes. Cellulae algarum approximative globosae seu modice ovatae, cum magnitudine 6-8X10-14 /л. Crassitudo membranae cellularum 0,8-0,9 JLI. Cellulae in acervis deformatis se ponuntur. In cellulis algarum unum, rarior duo seu tria chromatophora inveniuntur. Chromatophora - cum pyrenoidis singularis - in medio cellularum ponuntur. Multiplicatio cum autosporis isogametisque accidit. 246