Selection and conservation of forest tree genotypes more tolerant to industrial pollution : Air Pollution and Forest Decline. 14th International Meeting for Specialists in Air Pollution Effects on Forest Ecosystems

1989

S. 349-353

1 Tab., 20 Lit. Ang., En, Zfsg. En

Unselbständiges Werk

200034704

In field experments response to the action of industrial pollution were studied on various provenances and vegetative progenies of the following tree species Pinus sylvestris, Pinus nigra, Picea abies, Populus sp., Salix sp. and Betula sp. Only 2 - 10 % in the studies genotypes and/or provenances of tree demonstrate an increased tolerance to the specific action of high concentrations of Scots pine and Norway spruce that are relataively tolerant indicaste poorer growth while the most productive ones are the most sensitive. In industral regions only several dozens of individuals of pne and spruce were selected for their tolerance. These selected genotypes of trees are progagated vegetatively and stored on clone arhaives for further biochemical and physiological inestigations. Some clones of poplars and willows are to a greater extent tolerant to emissions where oxides of sulphur predominate, while they are more sensitive to compunds of luor from aluminium smelters. Clones of poplars from section Tacamahaca are tolerant to compounds of fluor but they are very sensitive to compounds of fluor from aluminium smelters. Clones of populars from section Tacamahaca are tolerant to compounds of flour but they are very sensitive to oxides of sulphur and heavy metals. Although introduction of more tolerant species, will be of prime importance in the recultivation of areas already denuded by high levels of soil and air pollution, must be stressed, that extent of pollution to protect the existing trees, and to allow reintroduction of native ones.