VARIATION IN COMPOSITION OF EXTRACTIVES FROM WOOD OF PINUS-NIGRA VARIETIES

Abstract

The wood of P. nigra vars pallasiana and pyramidata was analysed with regard to the main components lignin and holocellulose, as well as extractives. The lignin content was unusually low. Most of the extractives were fatty and resin acids. The var. pyramidata is richer in resin acids and differs also in the ratio of abietane- and pimarane-type acids from var, pallasiana. Some differences were also found in the sterol- and neutral diterpene-containing fractions.