Selection of species and clones for biomass willow forestry in Finland

Pohjonen, Veli

doi:10.14214/aff.7667

Cited by 11 publications

(13 citation statements)

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“…Primary growth data were statistically analyzed using the MINITAB general linearized model (GLM) after zero-adjustment to exclude nonviable cuttings. This was carried out on all growth data to highlight the cutting viability characteristics of individual species and to remove the distorting influence of zero values on the absolute values of the mean and standard error (Pohjonen, 1991 …”

Section: Discussionmentioning

confidence: 99%

“…One particular example is the known sporadic rooting in S. caprea cuttings (Pohjonen, 1991). Quite clearly the five replicates used in the first experiment were too few to accurately account for this variability.…”

Section: Discussionmentioning

confidence: 99%

“…In this context, the response of S. × sericans is also of interest (approximately 125% at 0.75 mg Cu l -1 ). This hybrid possessed favorable characteristics in terms of growth and viability (Stott, 1992), combining the high growth potential and winter hardiness of S. caprea with the high rooting viability of S. viminalis (Pohjonen, 1991). It is possible that this hybrid may also incorporate a favorable trait with respect to metal resistance.…”

Section: Discussionmentioning

confidence: 99%

“…Salix (willows and osiers) is one of the most genetically diverse tree genera in the European flora (Pohjonen, 1991;Meikle, 1992), containing both highly productive species used as biomass crops (e.g., S. viminalis) and extremely hardy species that colonize disturbed and industrially contaminated soils (S. caprea and S. cinerea) (Grime et al, 1988). Due to their extremely fast growth, they are also used for the production of natural screens, hedges, and for rapid soil stabilization (Gray and Sotir, 1992).…”

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confidence: 99%

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Heavy Metal Resistance and Accumulation Characteristics in Willows

Punshon

Dickinson

1999

International Journal of Phytoremediation

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The resistance of Salix to Cu, Cd, Ni, and Zn was investigated in hydroponic culture, with phytoextraction potential evaluated for Cu. Root elongation (indicative of resistance level) was significantly affected, with considerable variation between and within individual clones. Resistance appeared to be clone-or hybrid-specific, rather than species-specific. S. caprea clones (and hybrids) were among the most resistant, but a secondary S. caprea clone from a different provenance was much less tolerant. S. viminalis and S. triandra clones were the most sensitive. Highest resistance was found in response to Cd, while Cu and Ni were extremely toxic. A resistant S. caprea ecotype originating from a metalliferous mine spoil was identified using this technique. Copper concentration reached a maximum of 2000, 400, and 82 µg g -1 (d.wt) in roots, wood, and foliage, respectively, after 1 month in hydroponic culture. The level of variation in the response of Salix to metals may cause difficulties in phytoremediation screening programs, but may be essential in providing genetic variation for selection of metal resistance traits, where the contaminant profile is heterogeneous, mixed, or subject to change. Clone selection for metal phytoextraction is feasible, but a longer field-scale study on metal-contaminated soils is needed before their role in phytoremediation can be confirmed.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

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Heavy Metal Resistance and Accumulation Characteristics in Willows

Punshon

Dickinson

1999

International Journal of Phytoremediation

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“…Due to inherent differences in the rooting viability of individual species (Pohjonen, 1991) root growth data were zero-adjusted (i.e. all zero values were omitted).…”

Section: Discussionmentioning

confidence: 99%

Acclimation of Salix to metal stress

1997

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SUMMARYNine different clones of six species of Salix (Salix cordata Muhlenb. non Michaux, 5. fragilis L., S. caprea L., S. cinerea h., S. burjatica Nazarov. and 5. viminalis L.) and one hybrid (S. x calodendron Wimm.) were exposed to heavy metals in solution culture in an attempt to increase innate metal resistance. Resistance was estimated using comparative root measurements, and metal uptake was also studied. The first experiment entailed pretreatments with background nutrient solution, or 0-25 and 050 mg Cu 1"^ amendments, and re-exposure to each of the same concentrations. In a second experiment clones were exposed to sub-toxic concentrations of single metals (0-15 mg Cu 1"', O-lSmgCdl"' or 2-5mgZnl'') and dual-combination treatments (0-075mgCu|-'-l-0-O75mgCdl-', O'O75 mg Cu 1"'+ 1 25 mg Zn I"' or 0'075 mg Cd 1"'+ 1-25 mg Zn 1" = )' with concentrations gradually raised 10-fold over 128 d. Plants tested in the first experiment, following pre-exposure to Cu, were no more resistant to subsequent exposure to this metal. In the second experiment, gradual cumulati^ e doses resulted in reduced phytotoxicity and increased resistance, most notably to Cd. There appeared to be an inverse relationship between metal uptake and resistance. Copper uptake was restricted to the roots, whereas Cd and Zn were more evenly distributed throughout the plant. Exposure to dual combinations of metals resulted in several interaction effects on uptake: increased root-bound Cu in all combinations, and the increase in uptake of both Cd and Zn into the root tissues when supplied with Cu. The implications of these results for the use of willows in phytoremediation programmes are discussed.

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Long-term biomass production and nutrient uptake of birch, alder and willow plantations on cut-away peatland

Hytönen

Saarsalmi²

2009

Biomass and Bioenergy

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Selection of species and clones for biomass willow forestry in Finland

Cited by 11 publications

References 0 publications

Heavy Metal Resistance and Accumulation Characteristics in Willows

Heavy Metal Resistance and Accumulation Characteristics in Willows

Acclimation of Salix to metal stress

Long-term biomass production and nutrient uptake of birch, alder and willow plantations on cut-away peatland

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