Variation in diameter of central columns of discoloration in six hybrid poplar clones

Garrett, Peter W.; Shigo, Alex L.; Carter, Jonathan

doi:10.1139/x76-065

Cited by 5 publications

(3 citation statements)

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“…The relative extent of discoloration associated with both branch and trunk wounds was not significantly correlated to closure rate. This is in agreement with the work of Shigo et al (2,6), which indicates the existence of 2 separate and basically unre lated processes: closure and compartmentalization.…”

Section: Resultssupporting

confidence: 93%

“…Hepting et al (3) observed that the extent of wound-associated discoloration was relatively consistent within a species. Shigo et al (2,6) demonstrated surprisingly large differences regarding the ability of a clone within the species to compartmentalize rapidly and effectively. Degree of compartmentalization was found to be consistent within a clone, unrelated to closure rate, independent of growth rate, and not a function of tree size.…”

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confidence: 99%

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Variation in Wound Response among Cultivars of Red Maple

Gallagher

Sydnor

1983

J. Amer. Soc. Hort. Sci.

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Wound closure and growth data were determined over a 2-year period for 12 cultivars of red maple (Acer rubrum L.) and branch and trunk wounds were analyzed for extent of associated discolored wood. A cultivar effect was noted in both closure and compartmentalization rates. ‘Armstrong’, ‘Doric’, ‘Gerling’, and ‘October Glory’ exhibited below average closure rates; ‘Schlesinger’, ‘Autumn Flame’, and ‘Autumn Glory’ had a more rapid closure rate in response to wounding. ‘Red Sunset’ and ‘Schlesinger’ were above average and ‘Bowhall’ and ‘Scanlon’ were below average in capacity to compartmentalize wounds. Previous years' twig extension growth was a good prediction of a plant's ability to close wounds. Higher nutrient levels of callus were associated with higher closure rates.

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Section: Resultssupporting

confidence: 93%

mentioning

confidence: 99%

Variation in Wound Response among Cultivars of Red Maple

Gallagher

Sydnor

1983

J. Amer. Soc. Hort. Sci.

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“…Similar results for the same species were presented by Wang et al [25] in a study where the poplars were planted in spacings of 2 × 5, 4 × 5 and 4 × 10 m wetwood represented 56%, 62% and 65% of total volume respectively. In a study of six hybrid poplar clones, Garret et al [36] found different percentages of discolored wood versus stem diameter in logs.…”

Section: Characteristics Of the Distribution Of False Heartwood In Stemsmentioning

confidence: 99%

Frequency of False Heartwood of Stems of Poplar Growing on Farmland in Sweden

Johansson

Hjelm

2013

Forests

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Swedish owners of poplar stands are interested in both the wood quality and the use of poplars that are soon to be harvested. An important concern is the frequency of false heartwood (FHW) in the stems. We have presented an overview of the factors causing discolored wood as well as the industrial use and quality of the end products. We have studied poplar stems growing at 22 sites in Sweden between latitudes 55° N and 60° N. The mean age of the poplar was 23 years (range 14-41), the mean stand density 1011 stems ha −1 (range 155-3493) and the diameter at breast height (DBH) (over bark) 246 mm (range 121-447). All stands were growing on clay soils (light and medium clay and light clay tills). All of the sampled stems (42) contained false heartwood. At 0%-50% of stem height, all sampled trees were discolored and at 90% of stem height, 33% were discolored. The percentage of false heartwood area by stem area was highest at 1% and 10% of stem height (26.6% and 24.7% respectively). The "FHW" part of the stem had a radius of 47 mm (range 9-93) at 30% of stem height, which corresponds to 50% of the total stem radius. A log of six meters represents about 30% of stem height. Equations describing the correlation between DBH and the diameter of FHW at different stem heights (1%, 10%, 30%, 50%, 70% and 90%) and table describing FHW volume % by total stem volume at the first 50% of stem height were constructed. These might be helpful for estimating the percentage of fresh wood in a stem. However, most of the fast-growing poplars will be harvested as biofuel.

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Defense Mechanisms in the Sapwood of Living Trees against Microbial Infection

Yamada

2001

Journal of Forest Research

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Variation in diameter of central columns of discoloration in six hybrid poplar clones

Abstract: The percentage of stem diameter discolored in the center of hybrid poplar logs varied by clones. For the six clones studies, discoloration columns ranged in percentage of total stem diameter from 85.0 to 55.8.

Cited by 5 publications

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Variation in Wound Response among Cultivars of Red Maple

Variation in Wound Response among Cultivars of Red Maple

Frequency of False Heartwood of Stems of Poplar Growing on Farmland in Sweden

Defense Mechanisms in the Sapwood of Living Trees against Microbial Infection

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