Zs. P. Komáromy szerk.: Studia Botanica Hungarica 16. 1982 (Budapest, 1982)

Bohus, Gábor: Some results of systematical and ecological research on Agaricales, IX.

A typical case of frost injury was shown by the fruit body, which was held at -8°C for one day and it perished. In consequence of higher water content ice crystals formed in the cells and the effect of damage was conspicuous. Another observation is if the media is poor in nutrients (e.g. agar-agar with malt extract) the fructification goes on slowly and the primordia remain alive for weeks without any change in its condition, and it can be used for inoculation. On the other hand, in media rich in nutrient the fruit bodies grow up quickly and after a few days they are destroyed. The lower biotic potential or resistance capacity of the normal fruit body cells may be another factor which plays an important role in lower temperature tolerance. REFERENCES BOHUS, G. (1978): The introduction of Agaricus macrosporoides into cultivation. - Acta agron, hung., 27: 282-313. COCHRANE, V.W. (1958): Physiology of fungi, - New York, London, 524 pp. SINGER, R. (1962): The Agaricales in modern taxonomy. - Weinheim, 915 pp. Author'

s address: Dr. G. BOHUS Botanical Department of the Hungarian Natural History Museum Budapest, Pf: 222 H-1476 HUNGARY