Algal growth experiments in the Baradla Cave at Aggtelek (Biospeleologica hungarica XXI)

Erzsebet Kol
1967 International Journal of Speleology  
Intro(luction One of the most interesting problems facing speleobotanist today is the question of what energy source is used by the actively growing green algae which are found within caves throughout the world, since the eternally dark environment of the cave precludes the possibility of photosynthesis. Many algal species are known to be able, if necessary, to switch from their usual autotrophic assimilatory system to a heterotrophic nutrition if suitable organic maLerials are anilable (Chodat
more » ... re anilable (Chodat and Kol, 193ft). In the present paper we are primarily concerned with those which apparently retain not only an autotrophic mode of life, but also their original green colora Lion. lUatcrials and~Iethods In order to invesLigate this problem, several samples from axenic cultures of different algal strains present in the Kol collection of the Natural History Museum, Section of Botany, Budapest, were grown for varying periods of time in both light and dark, including cave environments. The cultures were inoculated inLo tubes on agar + Y:J Detmer-medium. For each experiment, Lhree parallel cultures from each sLrain were included for each varying environmenLal condition. The laboratory investigations were carried out in the Natural History Museum, Section of Botany. A total of 108 algal strains were used in these experiments. Cyanophyta was represented with 53 separate strains, Chlorophyta wiLh 35, and Chrysophyta with 20.A list of the individual sLrains is found below. In the following work the strains will be denoLed by their respective accession numbers in the Algotheca.
doi:10.5038/1827-806x.2.4.18 fatcat:lozutex6gfdz7eqb5vqi4lshay