Clone size in American aspens

Kemperman, Jerry A.; Barnes, Burton V.

doi:10.1139/b76-280

Cited by 212 publications

(162 citation statements)

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“…Previously reported ranges of individuals or clumps of ramets include 2-4 m in Fagus japonica (Kitamura et al, 1992), 4 m in Quercus chrysolepis (Montalvo et al, 1997), 8 m in Fagus grandifolia (Jones and Raynal, 1987), and areas of 50 m 2 in Thujopsis dolabrata (Hashimoto et al, 1999) and up to 43 ha in Populus tremuloides (Kemperman and Barnes, 1976). Thus, the A. trabeculosa range found in this study was similar to those of F. japonica and Q. chrysolepis.…”

Section: Naoko Et Alsupporting

confidence: 84%

Ecological and genetic effects of cutting in an Alnus trabeculosa Hand.-Mazz. (Betulaceae) population

Miyamoto¹,

Karamoto²,

Takahashi³

2003

Heredity

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In order to assess the ecological and genetic effects of cutting, we compared two portions of Alnus trabeculosa population at Yuda (Iwate Prefecture, Japan): one that has been cut about 30 years ago and one that has remained uncut. These portions were compared in terms of the degree of sprouting, genetic variation and gene distribution using isozyme markers. First, we determined the multilocus genotype (MLG) of all ramets, then sorted them into individuals according to the distribution of the MLGs. The average (7SE) of largest distance between ramets in one individual was 2.1 (70.18) m, which is consistent with the distance (2.0 (70.20) m) obtained by tracing physical connections between ramets. We found no significant differences in genetic variation between the two portions, but there were significant differences in their degree of sprouting. Furthermore, there were striking differences in gene distribution: the cut portion showed greater clustering of individuals with identical genetic components, which may be due to regeneration in the gaps made by cutting, reflecting the location of the mother trees, and seed and pollen dispersal from them.

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Section: Naoko Et Alsupporting

confidence: 84%

Ecological and genetic effects of cutting in an Alnus trabeculosa Hand.-Mazz. (Betulaceae) population

Miyamoto¹,

Karamoto²,

Takahashi³

2003

Heredity

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“…Forests consisting of Populus trees can comprise patchworks of large contiguous blocks of genetically identical ramets (39)(40)(41). Individuals from different parts of the same natural monoclonal stand, or clonal individuals grown at different geographic sites, could have divergent "histories" on account of differences in parameters such as water availability, prevailing wind, soil conditions, or exposure to pests or pathogens.…”

Section: Discussionmentioning

confidence: 99%

Clone history shapes Populus drought responses

Raj

Bräutigam

Hamanishi

et al. 2011

Proc. Natl. Acad. Sci. U.S.A.

164

129

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Just as animal monozygotic twins can experience different environmental conditions by being reared apart, individual genetically identical trees of the genus Populus can also be exposed to contrasting environmental conditions by being grown in different locations. As such, clonally propagated Populus trees provide an opportunity to interrogate the impact of individual environmental history on current response to environmental stimuli. To test the hypothesis that current responses to an environmental stimulus, drought, are contingent on environmental history, the transcriptome- level drought responses of three economically important hybrid genotypes—DN34 ( Populus deltoides × Populus nigra ), Walker [ P . deltoides var. occidentalis × ( Populus laurifolia × P . nigra )], and Okanese [Walker × ( P . laurifolia × P . nigra )]—derived from two different locations were compared. Strikingly, differences in transcript abundance patterns in response to drought were based on differences in geographic origin of clones for two of the three genotypes. This observation was most pronounced for the genotypes with the longest time since establishment and last common propagation. Differences in genome-wide DNA methylation paralleled the transcriptome level trends, whereby the clones with the most divergent transcriptomes and clone history had the most marked differences in the extent of total DNA methylation, suggesting an epigenomic basis for the clone history-dependent transcriptome divergence. The data provide insights into the interplay between genotype and environment in the ecologically and economically important Populus genus, with implications for the industrial application of Populus trees and the evolution and persistence of these important tree species and their associated hybrids.

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“…This increased growth is an example of facilitation among aspen trees whereby the seedling cluster occupied the physical above-ground space, and likely even below-ground space, thereby restricting forb competition. Aspen is a clonal species used to growing in very close proximity with other ramets in order to integrate resources below ground (Kemperman and Barnes, 1976). Our results provide an example of a similar process occurring above ground with individual genets in the form of plug stock seedlings.…”

Section: Discussionmentioning

confidence: 57%

Cluster Planting: Early Enhancement of Structrual Diversity in a Reclaimed Boreal Forest

Pinno¹,

Schoonmaker²,

Yücel³

et al. 2017

ASMR

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Abstract:Planting trees is an important step in re-establishing functioning forest ecosystems after industrial land disturbances. Conventional planting practices create forests with evenly spaced trees, at low density, which maximizes individual tree growing space but delays the time until crown closure, potentially for decades. In this study, the first operational cluster planting trial for reclaimed boreal forest, we examined first year tree growth and vegetation competition results of a cluster planting trial in which trembling aspen (Populus tremuloides) trees were planted in clusters of 4, 10, or 20 trees with an internal spacing of 0.25 m along with non-clustered controls. Clustering of aspen seedlings had a measurable impact on the relative proportions of tree and competing vegetation cover with increased tree cover and decreased forb cover in the 10 and 20 seedling clusters compared to the controls. Average seedling height and first year height growth were similar across all cluster treatments but tended to be higher in the clusters, likely due to the suppression of competing vegetation. Operationally, there are still many questions to be answered before this practice can be implemented in a large scale across the landscape. However, based on our initial results, we believe that cluster planting has the potential to become a valuable tool for reclamation practitioners.

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Clone size in American aspens

Cited by 212 publications

References 0 publications

Ecological and genetic effects of cutting in an Alnus trabeculosa Hand.-Mazz. (Betulaceae) population

Ecological and genetic effects of cutting in an Alnus trabeculosa Hand.-Mazz. (Betulaceae) population

Clone history shapes Populus drought responses

Cluster Planting: Early Enhancement of Structrual Diversity in a Reclaimed Boreal Forest

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