Observation of Wind-Loading Influences in Nonconcentric Radial Root Growth in Two Maple Species

2019 ◽  
Vol 45 (6) ◽  
Author(s):  
Jason Grabosky
Keyword(s):  
Root Growth ◽  
Growth Pattern ◽  
Radial Growth ◽  
Acer Rubrum ◽  
Comparative Assessment ◽  
Wind Loading ◽  
Serial Sections ◽  
Wind Exposure ◽  
Root Plate ◽  
Root Size

In 2010 and 2016, Acer saccharinum and Acer rubrum roots were harvested and processed into transverse serial sections to observe crosssectional radial growth patterning in response to wind. Trees on the edge of a plantation and from interior positions were selected, and windward/leeward roots were targeted for a comparative assessment. While some observations were suggestive of a response to wind exposure, they were not definitive. Particularly in the windward versus leeward comparison within either edge or interior ground in terms of root size or radial growth pattern, there were no differences observed. In general, the loss of observed upward radial growth bias very closely coincided with the ending of the Zone of Rapid Taper in the architecture of the root plate.

Release in radial growth in the trunk and structural roots of white spruce as measured by dendrochronology

1994 ◽  
Vol 24 (8) ◽  
pp. 1550-1556 ◽  
Author(s):  
S.T. Urban ◽  
V.J. Lieffers ◽  
S.E. Macdonald
Keyword(s):  
Root Growth ◽  
Radial Growth ◽  
White Spruce ◽  
Root Diameter ◽  
Diameter Growth ◽  
Trunk Diameter ◽  
The Road ◽  
Wind Exposure ◽  
Structural Roots ◽  
A New Technique

We used a new technique to examine the response of the trunk and structural roots of white spruce (Piceaglauca (Moench) Voss) to an increase in wind exposure. Ring widths were measured in the roots and trunks of trees located within a 120-year-old, boreal mixedwood stand (control) and at the edge of a road built through the stand 16 years before sampling (released). The observed ring widths were divided by widths predicted from regression to produce ring indices. Response indices were produced by subtracting the ring indices of control trees from those of released trees. Allocation indices were produced by subtracting the ring indices of trunks from those of roots. A final index, quantifying the change in allocation to the root and trunk after road clearing, was produced by subtracting allocation indices of control trees from those of released trees. Following the road clearing, the rate of trunk diameter growth remained unchanged for 3–9 years, while root diameter growth increased. These observations suggest that trunk growth may be suppressed for some years following road clearing as a result of increased root growth. The increase in root growth may help stabilize trees after exposure to increased wind stress by increasing the amount of root wood anchoring and supporting them.

Assessment of sugar maple health based on basal area growth pattern

2003 ◽  
Vol 33 (11) ◽  
pp. 2074-2080 ◽  
Author(s):  
Louis Duchesne ◽  
Rock Ouimet ◽  
Claude Morneau
Keyword(s):  
Growth Pattern ◽  
Acer Saccharum ◽  
Radial Growth ◽  
Sugar Maple ◽  
Basal Area ◽  
Tree Age ◽  
Tree Health ◽  
Health Decline ◽  
Area Growth ◽  
Natural Range

The first tree health decline symptoms usually observed are foliar deficiency symptoms, foliage loss, and dieback. To improve the subjective nature and unspecificity of these assessments, we examined sugar maple (Acer saccharum Marsh.) radial growth and health to develop an indicator of sugar maple tree health status based on radial growth pattern. We used the basal area increment (BAI) of 328 tree-ring collections from 16 sites located in southern Quebec, throughout the sugarbush natural range, that were categorized by defoliation class. BAI of trees with decline symptoms was significantly lower than that of healthy trees in 9 of the 16 stands. BAI trends since 1955 showed an inverse relationship with tree decline class measured in 1989, irrespective of tree age. The results indicate that declining trees in these stands have not recovered based on BAI. They also suggest that the decrease in slope of BAI predated the observed symptoms of sugar maple decline by at least one decade. Results suggest that sugar maple vigor and health can be assessed by measuring tree's BAI trend, an indicator that may be useful for the diagnosis of sugar maple health and status years before the appearance of visible canopy symptoms.

scholarly journals Growth Periodicity for Container-Grown Red and Freeman Maple Cultivars in AHS Heat-Zone 8

1999 ◽  
Vol 17 (3) ◽  
pp. 141-146
Author(s):  
Jeff L. Sibley ◽  
John M. Ruter ◽  
D. Joseph Eakes
Keyword(s):  
Root Growth ◽  
Interspecific Cross ◽  
Acer Rubrum ◽  
Growth Modeling ◽  
Growth Patterns ◽  
Diameter Growth ◽  
Red Maple ◽  
Heat Zone ◽  
Growth Increase ◽  
Growth Periodicity

Abstract Growth patterns of seven red maple (Acer rubrum L.) and three Freeman maple (Acer x freemanii E. Murray) cultivars grown in containers in Alabama were evaluated using monthly destructive harvests. The effectiveness of a growth modeling technique not previously described is demonstrated using the data presented for both the Freeman maple (red maple xsilver maple interspecific cross) and red maple categories. Freeman maple cultivars ‘Armstrong’, ‘Celzam’ (Celebration™), and ‘Jeffersred’ (Autumn Blaze™); and red maple cultivars ‘Autumn Flame’, ‘Fairview Flame’, ‘Landsburg’ (Firedance™), ‘Franksred’ (Red Sunset™), ‘Olson’ (Northfire™), ‘Northwood’, and ‘October Glory®’ were studied. Uniform liners of each cultivar were planted in 9.1-liter (#3) containers in March 1996. More than 75% of seasonal height and diameter growth was complete for most cultivars before mid-August, while only 25% of root growth had occurred by the end of August. The remaining 75% of root growth occurred from August through November. The greatest overall growth (based on height, diameter, and root growth increase) was for ‘Autumn Flame’ and ‘October Glory®’, both red maple cultivars; and Freeman maple cultivars ‘Celzam’ and ‘Jeffersred’. The least overall growth (based on height, diameter, and root growth increase), was for red maple cultivars ‘Northwood’ and ‘Landsburg’.

scholarly journals 102 EFFECT OF BACKFILL AND PLANTING BED AMENDMENTS ON GROWTH AND DROUGHT TOLERANCE OF ACER RUBRUM

HortScience ◽  
1994 ◽  
Vol 29 (5) ◽  
pp. 442g-443
Author(s):  
Timothy J. Smalley ◽  
Carleton B. Wood
Keyword(s):  
Drought Tolerance ◽  
Root Growth ◽  
Shoot Growth ◽  
Nitrogen Deficiency ◽  
Acer Rubrum ◽  
Pine Bark ◽  
Leaf Water Content ◽  
First Year ◽  
Native Soil ◽  
Expanded Shale

Commonly used planting techniques and soil amendments were compared to determine their effect on root growth, shoot growth, and drought tolerance of 2.5 cm caliper Acer rubrum. Study I: Trees were planted on 6 April 1992 into holes backfilled with 1) native soil, 2) 50% aged pine bark: 50% native soil, 3) 50% Mr. Natural™:50% native soil, or 4) 100% Mr. Natural™. Mr. Natural™ consists of granite sand, expanded shale, and composted poultry litter. After two years, no differences in growth or survival existed. Study II: On 8 April 1992, trees were planted in 1) unamended planting holes, 2) tilled planting beds, or 3) tilled and pine bark-amended planting beds. Five months after planting, the root growth in the tilled and tilled-amended beds did not differ, but both had more root growth than planting holes. Amendment-induced nitrogen deficiency reduced shoot growth of the tilled-amended treatment during the first year. After two years, the planting hole treatment exhibited the least shoot growth, while shoot growth of tilled and tilled-amended treatments did not differ. StudyIII: Selected trees in study II were drought stressed for 8 weeks beginning 4 August 1993. No differences in relative leaf water content among treatments were observed Results suggest that native soil should be used as backfill in planting holes; however, tilling a planting bed increases root and shoot growth compared to planting in a hole. Amending beds with pine bark did not increase growth or drought tolerance.

scholarly journals Impact of Tree Size and Container Volume at Planting, Mulch, and Irrigation on Acer rubrum L. Growth and Anchorage

2013 ◽  
Vol 39 (4) ◽  
Author(s):  
Edward Gilman ◽  
Jason Miesbauer ◽  
Chris Harchick ◽  
Richard Beeson
Keyword(s):  
Water Stress ◽  
Root Growth ◽  
Acer Rubrum ◽  
Tree Size ◽  
Irrigation Regimes ◽  
Nursery Production ◽  
Trunk Tilt ◽  
Root Deflection

Some trees uproot in storms apparently due to root deflections that occur during nursery production. Root deflection in a nursery container may lead to poor anchorage because of insufficient root growth into the landscape soil, and container volume/tree size at planting may influence root deflection. This study was designed to evaluate establishment, root growth, and anchorage six years after planting Acer rubrum L. trees of four different sizes from four corresponding container volumes and maintaining them with two irrigation regimes. Impact of mulch on establishment and root growth was also evaluated. Trees from the largest containers grew slowest in the first three years due primarily to water stress. Trunk tilt during winching tests increased due to greater root deflection, less mass of the root-soil plate, and reduced root growth into the landscape soil with increasing container volume and tree size. In contrast to the poorly anchored larger trees that had most of their large roots retained in the original planted root ball volume, the largest roots on trees from smaller containers grew freely into landscape soil. This resulted in stable trees with many stiff, straight roots pushing down against mineral landscape soil outside the root ball during winching. Trees planted from smaller containers appear to anchor sooner than trees from larger containers and would be more stable in a storm.

scholarly journals The Effects Of Pruning Type On Wind Loading Of Acer Rubrum

2006 ◽  
Vol 32 (1) ◽  
pp. 33-40
Author(s):  
E. Thomas Smiley ◽  
Brian Kane
Keyword(s):  
Center Of Pressure ◽  
Acer Rubrum ◽  
Bending Moment ◽  
Wind Load ◽  
Wind Loading ◽  
Load Reduction ◽  
Before And After

The wind load, bending moment, height, and weight were determined for 81 red maples (Acer rubrum) before and after pruning. Trees were thinned, reduced, lion tailed, or stripped of foliage. All three pruning treatments reduced wind load significantly compared to unpruned trees at all tested velocities (11, 16, and 20 m/sec [25, 35, and 45 mph]). Reduction in wind load increased with increasing velocity. Differences in wind-load reduction between reduction pruning and thinning were not significant at any velocity. The reduction in wind load was linearly related to the amount of weight removed by pruning treatments. Compared to the same trees prior to pruning, the center of pressure height was significantly lowered on thinned and reduced trees, while the center of pressure height did not change on lion-tailed trees.

scholarly journals Humectants as Post-plant Soil Amendments: Effects on Growth and Physiological Activity of Drought-stressed, Container-grown Tree Seedlings

2012 ◽  
Vol 38 (1) ◽  
pp. 6-12
Author(s):  
Bruce Roberts ◽  
R. Scott Linder ◽  
Charles Krause ◽  
Ryan Harmanis
Keyword(s):  
Root Growth ◽  
Leaf Gas Exchange ◽  
Physiological Activity ◽  
Acer Rubrum ◽  
Tree Seedlings ◽  
Red Maple ◽  
Xylem Water Potential ◽  
Yellow Poplar ◽  
Soil Drench ◽  
One Year

One-year-old seedlings of red maple (Acer rubrum L.) and yellow poplar (Liriodendron tulipifera L.) were treated with Hydretain ES™(HydES) or EcoSential™(EcoS) applied as a soil drench. A progressive drought cycle was imposed after treatment, and as each seedling wilted, the leaves and roots were harvested. Foliar growth was unaffected by HydES or EcoS, but root growth (roots < 1 mm diameter) was significantly less for seedlings grown in the humectant-treated media. These data, along with measurements of substrate moisture content taken during a similar dry down period, suggest that drought-induced fine root growth in humectant-treated media was slower because there was less need for these roots to extend and proliferate in search of additional soil moisture supplies. In studies conducted the following year, HydES or EcoS were applied as a soil drench to one-year-old seedlings of red maple and river birch (Betula nigra L.) prior to withholding irrigation. In these studies, measurements of chlorophyll fluorescence, leaf gas exchange, and xylem water potential indicate that physiological activity was greater for drought-stressed seedlings grown in HydES-treated media compared to similar seedlings grown in EcoS-treated media, a condition attributed to lower levels of plant-water stress (higher xylem water potentials) in the HydES-treated seedlings.

scholarly journals Root and Shoot Growth Periodicity of Pot-in-Pot Red and Sugar Maple

1999 ◽  
Vol 17 (2) ◽  
pp. 80-83 ◽  
Author(s):  
J. Roger Harris ◽  
Jody Fanelli
Keyword(s):  
Root Growth ◽  
Acer Saccharum ◽  
Sugar Maple ◽  
Acer Rubrum ◽  
Shoot Elongation ◽  
Red Maple ◽  
Sugar Maples ◽  
Root And Shoot Growth ◽  
Second Year ◽  
Substrate Temperatures

Abstract Red maple (Acer rubrum L. ‘Franksred’) and sugar maple (Acer saccharum Marsh. ‘Green Mountain’) trees were grown in a 56 liter (15 gal) pot-in-pot system for two years. During the second year of production, root growth was observed through observation plates fitted into the container sidewalls, and shoot extension was periodically measured. Root growth began in early March, approximately one month before budbreak for both species. Root growth dramatically slowed down at the onset of budbreak, but quickly resumed and was concurrent with shoot elongation. Root growth slowed dramatically in the fall when substrate temperatures dropped to 5–7C (40–45F). Root growth stopped during the winter for red maple, but some nominal root growth continued throughout the winter for sugar maple. Red maples had over 5 times more total root length against observation plates at the end of the experiment than sugar maples.

scholarly journals Antigenic Phenotype of Radial Growth Phase Melanomas with or without a Vertical Growth Phase Portion

1988 ◽  
Vol 74 (2) ◽  
pp. 157-162 ◽  
Author(s):  
Laura Brogelli ◽  
Paolo Carli ◽  
Umberto Maria Reali ◽  
Nicola Pimpinelli ◽  
Silvia Moretti
Keyword(s):  
Monoclonal Antibodies ◽  
Growth Phase ◽  
Growth Pattern ◽  
Radial Growth ◽  
Hla Antigens ◽  
Antigen Expression ◽  
Superficial Spreading ◽  
Vertical Growth ◽  
Vertical Growth Phase ◽  
Vertical Growth Pattern

The expression of 4 melanoma-associated antigens and of class I and II HLA antigens was investigated in 12 superficial spreading melanomas (SSM) and in 8 SSM with a vertical growth pattern portion (SS + NM) by the use of monoclonal antibodies and an indirect immunoperoxidase procedure. Monoclonal antibodies 225.28, 763.74, CL. 203, VF19-LL217, Q5-13, W6-32 and anti-HLA-DR, were used. Each antigen was more frequently expressed by SS +NM on the whole than by SSM and also by the radial growth pattern portions of SS + NM than by SSM. Vertical growth pattern portions of SS + NM were not antigenically similar to radial growth pattern portions in the same tumors. The high frequency of antigen expression in radial growth pattern melanomas seems to be associated with the appearance of a more invasive cell population.

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