Descriptions of Ten New Hybrid Poplars

Schreiner, E. J.; Stout, A. B.

doi:10.2307/2481110

Cited by 12 publications

(4 citation statements)

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“…Plants: Populus maximowiczii Henry X P. × berolinensis Dippel -(Oxford clone, see Schreiner and Stout 1934) was used for this study. This clone has already been used in previous experiments due to its demonstrated ozone sensitivity (Marzuoli et al 2009).…”

Section: Methodsmentioning

confidence: 99%

Responses to ozone on Populus "Oxford" clone in an open top chamber experiment assessed before sunrise and in full sunlight

et al. 2013

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The effects of ambient levels of ozone and summer drought were assessed on a poplar clone (Populus maximowiczii Henry X P. × berolinensis Dippel -Oxford clone) in an open top chamber experiment carried out at the Curno facilities (Northern Italy). Chlorophyll (Chl) a fluorescence parameters (from both modulated and direct fluorescence) were assessed at different hours of the day (predawn, morning, midday, afternoon, and evening), from June to August 2008. This paper compares the results from predawn (PD, before sunrise) and afternoon (AN, in full sunlight) measurements, in order to evaluate the role of high sunlight as a factor influencing responses to ozone stress. Sunlight affected the maximum quantum yield of primary photochemistry (decrease of F v /F m ) thus indicating photoinhibition. The effective quantum yield (Φ PSII ) and the photochemical quenching (q P ) were enhanced in the afternoon with respect to the predawn, whereas the nonphotochemical quenching (NPQ) was reduced. The effect of ozone was detected with fluorescence on well watered plants in the first week of July, before the onset of visible symptoms. As far as F v /F m are concerned, the differences between ozone-treated and control plants were statistically significant in the predawn, but not in the afternoon. Ozone exerted only minor effects on drought exposed plants because of the reduced stomatal ozone uptake, but effects on the IP phase of the fluorescence transient were observed also in drought-stressed plants.

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Section: Methodsmentioning

confidence: 99%

Responses to ozone on Populus "Oxford" clone in an open top chamber experiment assessed before sunrise and in full sunlight

et al. 2013

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“…The species considered were Fagus sylvatica L. (FS), a typical plant of mesophytic pre-alpine forests, Quercus robur L. (QR), a plain land woods species, and the sensitive poplar clone Populus maximowiczii Henry 9 P. 9 berolinensis Dippel (Oxford clone, according to Schreiner and Stout (1934), called Populus-POP-in this text). The latter is a fast growing tree employed in short rotation forestry.…”

Section: Plant Arrangement In the Otcs And Samplingmentioning

confidence: 99%

Growth and physiological responses to ozone and mild drought stress of tree species with different ecological requirements

Pollastrini

Desotgiu

Cascio

et al. 2010

Trees

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An open-top chamber experiment was carried out in Curno (Northern Italy) in 2004 and 2005 on seedlings of Fagus sylvatica (FS), Quercus robur (QR), and an ozone-sensitive Populus (POP) clone, to investigate the role of two stress factors: tropospheric ozone and water shortage. Treatments were filtered air to achieve a 50% reduction in the environmental ozone concentrations (charcoal filtered, CF); and non-filtered air, with a 5% reduction in the environmental ozone concentrations (non-filtered, NF). Overall ozone exposure (AOT40) in open air (April-September) was 26,995 ppb h in 2004 and 25,166 ppb h in 2005. The plants were either watered (W)or not watered (dry, D). We investigated the above-ground biomass, tree-ring growth, stable carbon isotopes ratio, i.e. d 13 C of tree rings, and the photosynthetic parameter Driving forces (DF ABS ), derived from chlorophyll a fluorescence analysis. Ozone-induced growth reduction (in terms of biomass) in POP, and that reduction was more pronounced in D plots. A synergistic effect of ozone and drought stress was evidenced by DF ABS in POP and QR, but not in FS. The water availability was revealed as the main factor influencing the isotopic ratio d 13 C. In droughtstressed seedlings, the increase in d 13 C value was accompanied by the reduction in stomatal conductance and increased DF ABS . Fast-growing plant species with high water requirements are more susceptible to ozone and drought stress.

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“…Currently, in Sweden, commercially deployable poplar varieties are reduced to clone "OP-42" (Populus maximowiczii Henry × P. trichocarpa Torr. & Gray) crossed in the1920s by Stout and Schreiner [7][8][9]. This clone has been planted since the 1990s on some thousand hectares at latitudes 56°-59°N reaching an annual biomass production of up to 10 Mg ha −1 year −1 [4,10] within rotations of 18-25 years.…”

Section: Introductionmentioning

confidence: 99%

An Analysis of Poplar Growth and Quality Traits to Facilitate Identification of Climate-Adapted Plant Material for Sweden

et al. 2020

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Poplar plantations harbor large potential as a renewable source of biomass for bioenergy and other industrial applications. The overall aim of this study is to analyze growth, phenology, stem form, and branching characteristics of 32 poplar clones grown in a trial in southern Sweden for their suitability to be grown as industrial feedstock. In a linear mixed model, performed for diameter at breast height and stem volume, the precision was improved by the use of two competition indices. The significance of phenology and quality characteristics for growth performance and ranking of poplar clones was evaluated through genotypic correlations, and multivariate hierarchical cluster analysis used to group the material. All traits showed moderate to high broad sense heritability. In general, higher stem volume was positively correlated with later leaf senescence, and uncorrelated with spring phenology. Selection efficiency for stem diameter and height was greatly improved between age 3 and 6 years allowing a better precision in selecting a subset of clones to be further tested in production plots and pilot plantations. Two commercial Populus maximowiczii Henry × trichocarpa Torr. & Gray cultivars performed best, while some intraspecific hybrids of P. trichocarpa are considered useful to genetically diversify commercial plantations in Southern Sweden (Belgian clones) or establish plantations in north-central parts of Sweden (Swedish clones). The cluster analysis emphasized growth traits and the grouping of the clones corresponded to their origin (or parentage). The results will facilitate decisions on the use of studied material in breeding, further testing and commercial deployment of poplar plantations in Sweden.

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Descriptions of Ten New Hybrid Poplars

Cited by 12 publications

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Responses to ozone on Populus "Oxford" clone in an open top chamber experiment assessed before sunrise and in full sunlight

Responses to ozone on Populus "Oxford" clone in an open top chamber experiment assessed before sunrise and in full sunlight

Growth and physiological responses to ozone and mild drought stress of tree species with different ecological requirements

An Analysis of Poplar Growth and Quality Traits to Facilitate Identification of Climate-Adapted Plant Material for Sweden

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