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We compared the growth of trees produced by micropropagation from nodal stem sections or callus tissue of a 20-year-old silver birch ( Betula pendula Roth) tree with that of seedlings; growth was monitored for 17 months in pots followed by six years in the field. Micropropagated trees from both...
Aboveground xylem hydraulic conductance was determined in Scots pine ( Pinus sylvestris L.) trees and stands from 7 to about 60 years of age. At the stand scale, leaf area index and net primary productivity (NPP, above- plus belowground) increased and reached a plateau at about 25–30 and...
Clonal variation in water use efficiency (WUE), dry mass accumulation and allocation, and stable carbon isotope ratio (δ 13 C) of crude leaf fiber extracts was determined in six clones of Eucalyptus grandis W. Hill ex Maiden. grown for 16 months in field lysimeters in two soil water regimes. The...
Glutathione S -transferases (GST) detoxify many electrophilic xenobiotics, including several volatile organic compounds and pesticides. The GST activity for the conjugation of several xenobiotic substances was isolated from needles of Norway spruce ( Picea abies L. Karst.) trees from a forest...
Rooting was induced in in-vitro-propagated walnut ( Juglans regia L.) shoots by subculturing the shoots on rooting medium containing agar and 3 mg l −1 indole-3-butyric acid (IBA) for 7 days in darkness. Changes in the concentrations of endogenous free indole-3-acetic acid (IAA),...
In August 1990, a 2-ha plantation was established in an area where rainfall (about 515 mm year −1 ) was insufficient to meet evaporative demand. On nine occasions between September 1991 and April 1993, pressure-volume curves were constructed for irrigated and rainfed Eucalyptus globulus ssp....
The terminal (1-year-old) shoot of quiescent, two-year-old balsam fir ( Abies balsamea (L.) Mill.) seedlings was ringed with lanolin containing 0, 1 or 10 mg g −1 Ethrel, an ethylene-generating compound, and cultured for 6 weeks under environmental conditions favorable for growth. Bud break and...
Foliar ozone uptake rates of different-sized black cherry ( Prunus serotina Ehrh.) trees were compared within a deciduous forest and adjacent openings in north-central Pennsylvania during one growing season. Study trees included open-grown seedlings and saplings, forest understory seedlings and...
A 16-h photoperiod stimulated bud burst in mature rooted cuttings of Prunus avium cv. Stella, but not in selfed Stella seedlings. However, in a 12-h photoperiod, bud burst occurred earlier in the seedlings than in the mature cuttings. In the 12-h photoperiod, production of polypeptides involved...
About 95% of swamp tupelo ( Nyssa sylvatica var. biflora (Walt.) Sarg.) and sweetgum ( Liquidambar styraciflua L.) seedlings survived continuous root flooding for more than two years, whereas none of the swamp chestnut oak ( Quercus michauxii Nutt.) and cherrybark oak ( Q. falcata var....
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