Long-term exposure of Sitka spruce seedlings to trichloroacetic acid.

The routes and kinetics of trichloroacetic acid uptake and elimination in Sitka spruce (Picea sitchensis) saplings via atmospheric deposition pathways

How Reproducible are the Reactions of Stress Indicators for Sitka Spruce Treated with Acid Mist?

SHEPPARD L.J. 1996. How reproducible are the reactions of stress indicators for Sitka spruce treated with acid mist? Phyton (Horn, Austria) 36 (3): (23) (30). Results of previously published experiments based on open-top chambers and field exposure systems with seedlings, mature grafts and physiologically mature trees (<13m tall) of Sitka spruce exposed to pH 2.5 mist are discussed briefly for ...

Relationship between nuclear DNA markers and physiological parameters in Sitka x interior spruce populations.

Eight populations of Sitka spruce (Picea sitchensis (Bong.) Carr.) and interior spruce (Picea glauca (Moench) Voss x Picea engelmannii Parry ex. Engelm.) seedlings were sampled from a zone of Sitka-interior spruce introgression in British Columbia, Canada. Restriction fragment length polymorphisms of the nuclear ribosomal RNA genes (rDNA) were used to define species-specific hybridization patte...

Trichloroacetic acid cycling in Sitka spruce saplings and effects on sapling health following long term exposure.

Trichloroacetic acid (TCA, CCl(3)COOH) has been associated with forest damage but the source of TCA to trees is poorly characterised. To investigate the routes and effects of TCA uptake in conifers, 120 Sitka spruce (Picea sitchensis (Bong.) Carr) saplings were exposed to control, 10 or 100 microg l(-1) solutions of TCA applied twice weekly to foliage only or soil only over two consecutive 5-mo...

Survival and Early Seedling Growth of Conifers with Different Shade Tolerance in a Sitka Spruce Spacing Trial and Rela- tionship to Understorey Light Climate

Alternative silvicultural systems to clearfelling are being adopted in Great Britain as a means of increasing the species and structural diversity of conifer plantation forests. One area where knowledge is lacking is the critical level of below-canopy light for survival and growth of young seedlings. This was investigated by planting seedlings of European larch Larix decidua (Mill.), Scots pine...