scholarly journals 243 Vegetative Growth of Malus domestica sp. Enhanced with the Use of the Mycorrhizal Fungus Glomus intraradices

HortScience ◽  
1999 ◽  
Vol 34 (3) ◽  
pp. 484B-484
Author(s):  
S. Mantha ◽  
H. Desilets ◽  
J.-A. Rioux ◽  
S. Gagne ◽  
S. Parent ◽  
...  
Keyword(s):  
Malus Domestica ◽  
Vegetative Growth ◽  
Glomus Intraradices ◽  
Mycorrhizal Fungus ◽  
Phosphorus Fertilization ◽  
Quebec City ◽  
Apple Rootstocks ◽  
Preceding Experiment ◽  
Mycorrhizal Inoculation ◽  
St Lawrence River

Two experiments with Malus domestica sp. were planted in 1997 at the Laval Univ. experimental farm located south of the St. Lawrence river near Quebec City. These experiments examined the association of the mycorrhizal fungus Glomus intraradices with Malus domestica sp. The first experiment compared the vegetative growth of `McIntosh' apple trees on M.106 rootstock in presence or absence of a commercial inoculum of G. intraradices (Premier Tech, Riviere-du-Loup, Quebec) under three levels of phosphorus fertilization (P) to the soil (0%, 50%, and 100% of the usual recommandation for this crop). After two seasons, all the treatments had better growth than the control (0% P without G. intraradices). The best treatment was achieved with 100% of the P associated with mycorrhizal inoculation. The second experiment compared the vegetative growth of three apple rootstocks Bud.9, M.26, and M.106, inoculated with G. intraradices under the same three P levels as the preceding experiment. Uninoculated rootstocks receiving the usual phosphorus fertilization served as control. Two roostocks, M.26 and M.106, increased growth with G. intraradices, while the third one, Bud.9, did not respond to the presence of mycorrhizal fungus.

scholarly journals Influence of Rockphosphate on Root Development and Growth of Strawberry Tips Inoculated with Endomycorrhizae

HortScience ◽  
1996 ◽  
Vol 31 (4) ◽  
pp. 663e-663
Author(s):  
Amal P. de Silva ◽  
W. Keith Patterson
Keyword(s):  
Root Growth ◽  
Root Development ◽  
Glomus Intraradices ◽  
Mycorrhizal Fungus ◽  
Dry Weight ◽  
Mycorrhizal Infection ◽  
Root Dry Weight ◽  
Mycorrhizal Inoculation ◽  
Quadratic Relationship ◽  
Mycorrhizal Plants

Strawberry (Fragaria ×ananasa Duch. `Chandler') tips containing only root initials were inoculated with mycorrhizal fungus Glomus intraradices and were fertilized with rockphosphate levels of 1, 2, 4 and, 6 mg·cm–3 to study root growth and mycorrhizal infection. The addition of rockphosphate at >2 mg·cm–3 decreased mycorrhizal infection. Root dry weight of mycorrhizal strawberry plants increased significantly over the controls with addition of rockphosphate, and mycorrhizal infection significantly decreased the shoot: root ratio. Foliar P levels decreased in mycorrhizal plants fertilized with up to 4 mg·cm–3 of rockphosphate and a quadratic relationship was seen between rockphosphate levels and foliar P. In nonmycorrhizal plants, the highest foliar P level was with rockphosphate at 1 mg·cm–3. The study revealed rockphosphate at 1 to 2 mg·cm–3 is beneficial for greater root growth with mycorrhizal inoculation.

Ice Bridges on the St. Lawrence River as an Index of Winter Severity from 1620 to 1910

2007 ◽  
Vol 20 (4) ◽  
pp. 757-764 ◽  
Author(s):  
Daniel Houle ◽  
Jean-David Moore ◽  
Jean Provencher
Keyword(s):  
Positive Impact ◽  
Volcanic Eruptions ◽  
Temperature Reconstruction ◽  
Winter Temperature ◽  
Climate Forcing ◽  
Quebec City ◽  
Temperature Index ◽  
Saint Lawrence River ◽  
St Lawrence River ◽  
Winter Severity

Abstract Temperature reconstruction of the last thousand years suggests that an unprecedented warming (+0.6°C) occurred over the globe in the last century. However, regional variations in climate are not resolved by Northern Hemisphere reconstructions. In northeastern North America, past climate and, particularly, past winter variations are poorly known. Here, the authors report on the variation of a winter temperature index during the 1620–1910 period, based on the ice bridge formation (IBF) rate on the Saint Lawrence River at Québec City (Canada), combined with instrumental data (1876–2000). During this 300-yr period, the IBF rate shows that winters in the seventeenth and eighteenth centuries were warmer than those in the nineteenth century. In particular, the IBF rate suggests that winter severity culminated in the 1850–1900 period, while very few ice bridges were reported between 1620 and 1740, presumably because of warmer temperatures and the relative scarcity of historical documents for the 1680–1740 period. These data suggest that winter temperature, particularly between ∼1800 and 1910, was 2.4° to 4.0°C colder than the last 30-yr average. Major volcanic eruptions had a significant positive impact on IBF rates, which is consistent with their role as important climate-forcing events.

GiFRD encodes a protein involved in anaerobic growth in the arbuscular mycorrhizal fungus Glomus intraradices

2012 ◽  
Vol 49 (4) ◽  
pp. 313-321 ◽  
Author(s):  
Kinga A. Sędzielewska ◽  
Katja Vetter ◽  
Rüdiger Bode ◽  
Keith Baronian ◽  
Roland Watzke ◽  
...  
Keyword(s):  
Glomus Intraradices ◽  
Arbuscular Mycorrhizal Fungus ◽  
Mycorrhizal Fungus ◽  
Arbuscular Mycorrhizal ◽  
Anaerobic Growth
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