Dying piece by piece: carbohydrate dynamics in aspen (Populus tremuloides) seedlings under severe carbon stress

The Canadian tuckahoe is the perennial sclerotium of Polyporus tuberaster jacq. ex Fries. It is commonly found in the parkland belt of the Canadian prairies where land supporting, virgin poplar groves, mainly Populus tremuloides Michx., is being brought under cultivation. Sporophore as many as three to a single sclerotium, appear in late June and July. Interfertility studies with single spore cultures isolated from sporophores derived from four sources in Western Canada and from one source in Italy have shown that both the Canadian fungus and the European P. tuberaster are heterothallic, have the tetrapolar type of interfertility, and are interfertile.

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Ethylene enhances root water transport and aquaporin expression in trembling aspen (Populus tremuloides) exposed to root hypoxia

BMC Plant Biology ◽

10.1186/s12870-021-02995-7 ◽

2021 ◽

Vol 21 (1) ◽

Author(s):

Xiangfeng Tan ◽

Mengmeng Liu ◽

Ning Du ◽

Janusz J. Zwiazek

Keyword(s):

Gas Exchange ◽

Water Transport ◽

Populus Tremuloides ◽

Leaf Gas Exchange ◽

Hydraulic Conductance ◽

Root Hydraulic Conductance ◽

Trembling Aspen ◽

Expression Levels ◽

Root Hypoxia ◽

Exogenous Ethylene

Abstract Background Root hypoxia has detrimental effects on physiological processes and growth in most plants. The effects of hypoxia can be partly alleviated by ethylene. However, the tolerance mechanisms contributing to the ethylene-mediated hypoxia tolerance in plants remain poorly understood. Results In this study, we examined the effects of root hypoxia and exogenous ethylene treatments on leaf gas exchange, root hydraulic conductance, and the expression levels of several aquaporins of the plasma membrane intrinsic protein group (PIP) in trembling aspen (Populus tremuloides) seedlings. Ethylene enhanced net photosynthetic rates, transpiration rates, and root hydraulic conductance in hypoxic plants. Of the two subgroups of PIPs (PIP1 and PIP2), the protein abundance of PIP2s and the transcript abundance of PIP2;4 and PIP2;5 were higher in ethylene-treated trembling aspen roots compared with non-treated roots under hypoxia. The increases in the expression levels of these aquaporins could potentially facilitate root water transport. The enhanced root water transport by ethylene was likely responsible for the increase in leaf gas exchange of the hypoxic plants. Conclusions Exogenous ethylene enhanced root water transport and the expression levels of PIP2;4 and PIP2;5 in hypoxic roots of trembling aspen. The results suggest that ethylene facilitates the aquaporin-mediated water transport in plants exposed to root hypoxia.

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The bacteria in sapwood, wetwood, and heartwood of trembling aspen (Populus tremuloides)

Canadian Journal of Botany ◽

10.1139/b73-060 ◽

1973 ◽

Vol 51 (2) ◽

pp. 498-500 ◽

Cited By ~ 15

Author(s):

Donald M. Knutson

Keyword(s):

Populus Tremuloides ◽

Trembling Aspen ◽

Indigenous Bacteria ◽

Large Populations ◽

Xylem Tissue

Bacteria (Erwinia, Bacillus) were consistently isolated from all samples of aspen sapwood and heartwood. In wetwood zones (water-soaked xylem tissue) or discolored heartwood, large populations often occur. No organisms unique to wetwood were isolated. Wetwood probably is formed by nonmicrobial means and, once formed, merely supports large populations of indigenous bacteria.

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Polyploidy influences plant–environment interactions in quaking aspen (Populus tremuloides Michx.)

Tree Physiology ◽

10.1093/treephys/tpx120 ◽

2017 ◽

Vol 38 (4) ◽

pp. 630-640 ◽

Cited By ~ 6

Author(s):

Burke T Greer ◽

Christopher Still ◽

Grace L Cullinan ◽

J Renée Brooks ◽

Frederick C Meinzer

Keyword(s):

Populus Tremuloides ◽

Quaking Aspen ◽

Plant Environment

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Chondrostereum purpureum as a biological control agent in forest vegetation management. II. Efficacy on Sitka alder and aspen in western Canada

Canadian Journal of Forest Research ◽

10.1139/x99-121 ◽

1999 ◽

Vol 29 (7) ◽

pp. 852-858 ◽

Cited By ~ 22

Author(s):

G J Harper ◽

P G Comeau ◽

W Hintz ◽

R E Wall ◽

R Prasad ◽

...

Keyword(s):

Populus Tremuloides ◽

Biological Control Agent ◽

Control Agent ◽

Control Analysis ◽

Fungal Treatment ◽

Fungal Isolates ◽

Alnus Viridis ◽

Field Efficacy ◽

Chondrostereum Purpureum ◽

Stem Mortality

A national research program was established to test the field efficacy of the native fungal pathogen Chondrostereum purpureum (Pers. ex Fr.) Pouzar) for control of hardwood vegetation. During 1995, two fungal isolates were applied as a biocontrol agent to the cut stumps of Populus tremuloides Michx. (trembling aspen) and Alnus viridis ssp. sinuata (Regel) Á. Löve & D. Löve (Sitka alder). Treatments consisted of two formulations (BC, ON) in combination with two fungal isolates (2139, JAM6), blank formulations, cutting only, triclopyr herbicide application, and an uncut control. Analysis of Sitka alder clump mortality indicated isolates JAM6 and 2139 in combination with the BC formulation caused clump mortality of 90 and 88%, respectively. The blank formulation treatments caused the lowest clump mortality and appeared to promote sprouting and growth of Sitka alder when compared with cutting alone. At the aspen installation, the BC formulation with isolate 2139 was found to be the most effective fungal treatment resulting in 84% aspen stem mortality. The results from both installations suggest that C. purpureum efficacy appears to be dependent on the virulence of the isolate and the formulation.

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Atmospheric CO 2 , Soil-N Availability, and Allocation of Biomass and Nitrogen by Populus tremuloides

Ecological Applications ◽

10.2307/2640984 ◽

2000 ◽

Vol 10 (1) ◽

pp. 34 ◽

Cited By ~ 1

Author(s):

Donald R. Zak ◽

Kurt S. Pregitzer ◽

Peter S. Curtis ◽

Christoph S. Vogel ◽

William E. Holmes ◽

...

Keyword(s):

Populus Tremuloides ◽

N Availability ◽

Soil N ◽

Soil N Availability

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Canopy and edge activity of bats in a quaking aspen (Populus tremuloides) forest

Canadian Journal of Zoology ◽

10.1139/z2012-049 ◽

2012 ◽

Vol 90 (7) ◽

pp. 798-807 ◽

Cited By ~ 3

Author(s):

T.W. Pettit ◽

K.T. Wilkins

Keyword(s):

Populus Tremuloides ◽

High Frequency ◽

Regression Tree ◽

Low Frequency ◽

Tree Height ◽

Quaking Aspen ◽

Activity Levels ◽

Forest Canopies ◽

Bat Activity ◽

Cart Analysis

Characteristics of edges affect the behavior of species that are active in and near edges. Forest canopies may provide edge-like habitat for bats, though bat response to edge orientation has not been well examined. We sampled bat activity in quaking aspen ( Populus tremuloides Michx.) forest canopies and edges in Heber Valley, Utah, during summer 2009 using Anabat detectors. Categorization and regression tree (CART) analysis of echolocation characteristics (e.g., frequency, duration) identified two guilds based on characteristic frequency (i.e., high- and low-frequency guilds). We used linear regression to compare characteristics of canopy and edge vegetation (e.g., tree height, diameter at breast height) to bat activity levels. Activity levels of high-frequency bats did not respond differentially to edge vegetation; low-frequency bat activity seemed to respond to canopy height. Activity levels of high-frequency bats were significantly greater than low-frequency bats in both edges and canopies. We detected significantly more bat activity in forest edges than in forest canopies, indicating the importance of edges to bats in forests.

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Impact du chancre hypoxylonien sur le tremble de 2 unités de gestion du Québec

The Forestry Chronicle ◽

10.5558/tfc58139-3 ◽

1982 ◽

Vol 58 (3) ◽

pp. 139-142

Author(s):

Louis Archambault

Keyword(s):

Populus Tremuloides ◽

Forest Stands ◽

Management Units ◽

Hypoxylon Mammatum ◽

The Impact

A survey was conducted in the management units of Portneuf and Grand-Portage, Québec to determine the impact of Hypoxylon canker (Hypoxylon mammatum (Wahl.)) on aspen (Populus tremuloides Michx.). In 78 forest stands (2340 stems) of Portneuf, sampling revealed 2.6% of stems (2.0% of volume) affected or dead. In the 82 Grand-Portage stands (2460 stems) 4.1% of stems (2.8% of volume) were affected or dead. Other analyses were carried out on the frequency of the disease in relation to stand characteristics.Although annual losses which represent only a sixth of this evaluation are relatively low, we must emphasize that they are cumulative over the whole life of the stands. Moreover, the importance of the impact could increase if aspen was widely used.

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