scholarly journals Carbon translocation patterns associated with new root proliferation during episodic growth of transplanted Quercus rubra seedlings

2008 ◽  
Vol 28 (7) ◽  
pp. 1121-1126 ◽  
Author(s):  
J. L. Sloan ◽  
D. F. Jacobs
Keyword(s):  
Quercus Rubra ◽  
Root Proliferation ◽  
Episodic Growth ◽  
Carbon Translocation

Endogenous translocation patterns of current photosynthate in post-transplant Quercus rubra seedlings

2018 ◽  
Vol 48 (9) ◽  
pp. 1067-1072 ◽  
Author(s):  
Joshua L. Sloan ◽  
George S. Jackson ◽  
Douglass F. Jacobs
Keyword(s):  
Quercus Rubra ◽  
Red Oak ◽  
Growth Stages ◽  
Sink Strength ◽  
Northern Red Oak ◽  
Post Transplant ◽  
Seedling Physiology ◽  
Carbon Translocation ◽  
Morphological Index ◽  
Exogenous Treatment

Variability between individuals can cause error in plant physiology studies when measurements or treatments occur on a chronological basis. Thus, plant growth indices such as the Quercus morphological index (QMI) were developed, enabling distinctions between exogenous treatment effects and endogenous ontological effects. Few studies have examined post-transplant northern red oak (Quercus rubra L.) seedling physiology in relation to the QMI. We used 14CO2 to label current photosynthate of post-transplant northern red oak seedlings during the first flush to assess endogenous patterns of current photosynthate translocation. Carbon translocation patterns relative to QMI growth stages of post-transplant seedlings resembled those described in pre-transplant seedlings, with expanding leaves and shoots retaining the majority of current photosynthate early in the flush, followed by increases in downward translocation to both new and old roots during the lag stage, when active aboveground growth ceased for the flush. Early post-transplant growth of new shoots relied heavily on stored carbohydrates, and old shoots demonstrated negligible sink strength for current photosynthate throughout the experiment. Our findings emphasize the importance of stored carbohydrates for early post-transplant growth and suggest that QMI-based observations regarding carbohydrate translocation patterns of pre-transplant seedlings in this species remain largely valid for post-transplant seedlings.

Carbon Partitioning and Herbicide Transport in Glyphosate-Treated Sugarbeet (Beta vulgaris)

Weed Science ◽  
1984 ◽  
Vol 32 (4) ◽  
pp. 546-551 ◽  
Author(s):  
Judy A. Gougler ◽  
Donald R. Geiger
Keyword(s):  
Beta Vulgaris ◽  
Carbon Metabolism ◽  
Carbon Partitioning ◽  
Starch Accumulation ◽  
Carbon Export ◽  
Carbon Translocation ◽  
Herbicide Transport

Glyphosate [N-(phosphonomethyl)glycine] had several effects on carbon translocation in sugarbeet (Beta vulgarisL. ‘Klein E multigerm’): a) import of carbon by sink leaves was inhibited, b) net starch accumulation in source leaves was stopped, and c) carbon export from source leaves in the dark was stopped following 10 h of treatment in the light. During periods when no carbon was exported, glyphosate also was not transported from treated leaves. The limitation of glyphosate transport, resulting from disruption of carbon metabolism, appears important in the study and use of the herbicide.

scholarly journals Al3+ and Ca2+ Alteration of Membrane Permeability of Quercus rubra Root Cortex Cells

1987 ◽  
Vol 83 (1) ◽  
pp. 159-162 ◽  
Author(s):  
Xiao-Jun Zhao ◽  
Edward Sucoff ◽  
Eduard J. Stadelmann
Keyword(s):  
Membrane Permeability ◽  
Quercus Rubra ◽  
Root Cortex ◽  
Root Cortex Cells

scholarly journals Diversity by episodic growth

Nature ◽  
1994 ◽  
Vol 368 (6470) ◽  
pp. 392-392
Keyword(s):  
Episodic Growth

A Note on the Association of Fall Cankerworm (Alsophila pometaria (Harr.)) with Winter Moth (Operophtera brumata (Linn.)) (Lepidoptera: Geometridae)

1958 ◽  
Vol 90 (9) ◽  
pp. 538-540 ◽  
Author(s):  
C. C. Smith
Keyword(s):  
Tree Species ◽  
Life Histories ◽  
Quercus Rubra ◽  
Acer Platanoides ◽  
Operophtera Brumata ◽  
Ulmus Americana ◽  
Winter Moth ◽  
The Third ◽  
Norway Maple ◽  
Fall Cankerworm

The fall cankerworm, Alsophila pometaria (Harr.), and the winter moth, Operophtera brumata (Linn.), both feed to a great extent on the same tree species and prefer apple, Malus spp., red oak, Quercus rubra L., basswood, Tilia spp., white elm, Ulmus americana L., and Norway maple, Acer platanoides L. They also have similar life-histories and habits (Smith 1950 and 1953). Both lay their eggs on the trees in the fall and overwinter in this stage. The eggs hatch about the same time and the larvae of (both species mature about the third week in June. They drop to the ground and form cocoons at a depth of about an inch. The adults emerge about the same time, commencing usually during the last week in October and continuing until early December or until the ground freezes.

scholarly journals Oak (Acorn)–Weevil Interactions across an Extensive Latitudinal Gradient in Eastern North America

Diversity ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 303
Author(s):  
Michael A. Steele ◽  
Harmony J. Dalgleish ◽  
Shealyn Marino ◽  
Andrew W. Bartlow ◽  
Rachel Curtis ◽  
...  
Keyword(s):  
Latitudinal Gradient ◽  
Quercus Rubra ◽  
Geographic Area ◽  
Eastern North America ◽  
Red Oak ◽  
Quercus Alba ◽  
White Oak ◽  
Opposite Pattern ◽  
Chemical Gradients ◽  
Latitudinal Transect

Recent studies have explored how nut weevils (Curculio and Conotrachelus spp. (Coleoptera: Curculionidae) prey on the fruits (acorns) of oak (Quercus spp.). However, few, if any, have examined these interactions over both an extensive geographic area and over several years. Here, we observed patterns of infestation in acorns of both red oak (Quercus rubra) and white oak (Quercus alba) over an eight-year period along a latitudinal transect, extending as far as 900km, across much of the shared range of these two oak species. Although weevil prevalence did not differ significantly between the two oak species, in red oak, infestation prevalence increased significantly with latitude. In contrast, an opposite pattern was evident in white oak, with the highest infestation prevalence occurring at lower latitudes. One controlled measure of cotyledon damage was significantly lower in acorns of red oak than those of white oak, which may in part be due to larger acorn size at the lower latitudes. Future investigations in this system should focus on the distribution of weevil species (with DNA barcoding) across this range and geographic variation in chemical gradients that likely determine patterns of weevil damage in individual acorns.

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