scholarly journals Evolution of Conifer Diterpene Synthases: Diterpene Resin Acid Biosynthesis in Lodgepole Pine and Jack Pine Involves Monofunctional and Bifunctional Diterpene Synthases

2012 ◽  
Vol 161 (2) ◽  
pp. 600-616 ◽  
Author(s):  
Dawn E. Hall ◽  
Philipp Zerbe ◽  
Sharon Jancsik ◽  
Alfonso Lara Quesada ◽  
Harpreet Dullat ◽  
...  
Keyword(s):  
Lodgepole Pine ◽  
Resin Acid ◽  
Jack Pine ◽  
Acid Biosynthesis ◽  
Diterpene Synthases

scholarly journals Cold hardiness of white spruce, black spruce, jack pine, and lodgepole pine needles during dehardening

2017 ◽  
Vol 47 (8) ◽  
pp. 1116-1122 ◽  
Author(s):  
Rongzhou Man ◽  
Pengxin Lu ◽  
Qing-Lai Dang
Keyword(s):  
Picea Glauca ◽  
Pinus Banksiana ◽  
Cold Hardiness ◽  
Black Spruce ◽  
Lodgepole Pine ◽  
White Spruce ◽  
Visual Assessment ◽  
Jack Pine ◽  
Pine Needles ◽  
Late Winter

Conifer winter damage results primarily from loss of cold hardiness during unseasonably warm days in late winter and early spring, and such damage may increase in frequency and severity under a warming climate. In this study, the dehardening dynamics of lodgepole pine (Pinus contorta Dougl. ex. Loud), jack pine (Pinus banksiana Lamb.), white spruce (Picea glauca (Moench) Voss), and black spruce (Picea mariana (Mill.) B.S.P.) were examined in relation to thermal accumulation during artificial dehardening in winter (December) and spring (March) using relative electrolyte leakage and visual assessment of pine needles and spruce shoots. Results indicated that all four species dehardened at a similar rate and to a similar extent, despite considerably different thermal accumulation requirements. Spring dehardening was comparatively faster, with black spruce slightly hardier than the other conifers at the late stage of spring dehardening. The difference, however, was relatively small and did not afford black spruce significant protection during seedling freezing tests prior to budbreak in late March and early May. The dehardening curves and models developed in this study may serve as a tool to predict cold hardiness by temperature and to understand the potential risks of conifer cold injury during warming–freezing events prior to budbreak.

scholarly journals Effects of Lodgepole Pine Dwarf Mistletoe, Arceuthobium americanum, on Jack Pine, Pinus banksiana, Growth in Manitoba

2004 ◽  
Vol 118 (4) ◽  
pp. 595 ◽  
Author(s):  
Brock Epp ◽  
Jacques C. Tardif
Keyword(s):  
Pinus Banksiana ◽  
Growth Models ◽  
Lodgepole Pine ◽  
Wood Quality ◽  
Basal Area ◽  
Jack Pine ◽  
Dwarf Mistletoe ◽  
Tree Form ◽  
Arceuthobium Americanum ◽  
Pine Trees

The Lodgepole Pine Dwarf Mistletoe (Arceuthobium americanum Nutt. ex Engelm.) is an important pathogen of Jack Pine (Pinus banksiana Lamb.). Dwarf Mistletoe alters tree form, suppresses growth, and reduces volume and overall wood quality of its host. Stem analysis and a 3-parameter logistic regression model were used to compare the growth of heavily and lightly to non infected Jack Pine trees. At the time of sampling, no significant reduction in diameter at breast height and basal area were observed in heavily infected trees. However, a significant reduction in height and volume and an increase in taper were observed in heavily infected trees. Growth models predicted a 21.1% lower basal area, 23.4% lower height and 42.1% lower volume by age 60 for the high infection group.

scholarly journals Aerial Applications of Ethylene-Releasing Chemicals Fail to Promote Abscission of Dwarf Mistletoe Aerial Shoots on Jack Pine

1989 ◽  
Vol 65 (3) ◽  
pp. 194-195
Author(s):  
F. A. Baker ◽  
K. Knowles ◽  
T. R. Meyer ◽  
D. W. French
Keyword(s):  
Key Words ◽  
Seed Production ◽  
Chemical Control ◽  
Lodgepole Pine ◽  
Jack Pine ◽  
Aerial Application ◽  
Dwarf Mistletoe

The ethylene-releasing chemical Cerone was applied in early August to two strands of jack pine infested with the lodgepole pine dwarf mistletoe in northwestern Manitoba. Nine weeks after aerial application, Cerone failed to cause appreciable abscission of dwarf mistletoe aerial shoots, while almost 90% of the aerial shoots on branches treated from the ground had abscised. Ground application of Cerone could reduce spread of dwarf mistletoe by limiting seed production. Key Words: Arceuthobium, jack pine, chemical control

Effect of geographic variation and jack pine introgression on disease and insect resistance in lodgepole pine

1996 ◽  
Vol 26 (5) ◽  
pp. 711-726 ◽  
Author(s):  
Harry X. Wu ◽  
Cheng C. Ying ◽  
John A. Muir
Keyword(s):  
British Columbia ◽  
Lodgepole Pine ◽  
Pest Resistance ◽  
Strong Relationship ◽  
Jack Pine ◽  
Yukon Territory ◽  
Geographic Patterns ◽  
Effective Selection ◽  
Pest Incidence ◽  
Natural Range

Incidence of western gall rust (Endocronartiumharknessii (J.P. Moore) Y. Hiratsuka), stalactiform blister rust (Cronartiumcoleosporioides Arth.), needle cast (Lophodermellaconcolor (Dearn.) Darker), and sequoia pitch moth (Synanthedonsequoiae (Hy. Edwards) (Lepidoptera: Sesiidae)) attacks were investigated in a lodgepole pine (Pinuscontorta Dougl. ex Loud, van latifolia Engelm.) provenance–family test plantation located at Red Rock Tree Improvement Station, Prince George, British Columbia. This plantation contains 778 wind-pollinated families from 53 provenances in British Columbia, Alberta, and the Yukon Territory. Pest incidence was assessed in 1993 when the plantation was 21 years old. Provenance had a significant effect on resistance to the four disease and insect attacks. Regression models using latitude, longitude, and elevation as predictors accounted for 38% to 80% of the provenance variation in pest incidence. Geographic patterns of genetic variation in pest resistance essentially followed longitudinal and elevational clines. The most interesting finding is the strong relationship between pest incidence and provenance distance to the western limit of the natural range of jack pine (Pinusbanksiana Lamb,): the closer a lodgepole pine provenance is to the edge of jack pine distribution, the higher is its resistance to the pests. We hypothesize that jack pine introgression may have played a significant role in the evolution of pest defense in lodgepole pine. Effective selection and breeding for pest resistance in lodgepole pine may have to look beyond the intraspecific gene pool.

Testing for trade-offs between flight and reproduction in the mountain pine beetle (Coleoptera: Curculionidae) on two pine (Pinaceae) hosts

2019 ◽  
Vol 151 (3) ◽  
pp. 298-310 ◽  
Author(s):  
Asha Wijerathna ◽  
Caroline Whitehouse ◽  
Heather Proctor ◽  
Maya Evenden
Keyword(s):  
Pinus Banksiana ◽  
Mountain Pine Beetle ◽  
Lodgepole Pine ◽  
Jack Pine ◽  
Tree Level ◽  
Offspring Sex Ratio ◽  
Individual Tree ◽  
Mountain Pine ◽  
Trade Offs ◽  
Pine Beetle

AbstractMountain pine beetle, Dendroctonus ponderosae Hopkins (Coleoptera: Curculionidae: Scolytinae), adults fly to disperse before host colonisation. The effect of flight on reproduction was tested by comparing the number and quality of offspring from beetles flown on flight mills to that of unflown control beetles. Beetles reproduced in bolts of their native host, lodgepole pine (Pinus contorta var. latifolia Engelmann (Pinaceae)), or a novel host, jack pine (Pinus banksiana Lambert (Pinaceae)). Bolts infested by control beetles produced more offspring overall than bolts with flown beetles. The effect of pine species on the number of offspring produced per bolt varied by individual tree. Flown adults produced fewer offspring compared to control parents in all bolts in jack pine regardless of the tree, but tree-level variation was visible in lodgepole pine. An interaction between flight treatment and tree host affected beetle body condition. More offspring emerged from jack pine, but higher quality offspring emerged from lodgepole pine. The offspring sex ratio was female-biased regardless of parental flight treatment. This study reveals trade-offs between flight and reproduction in mountain pine beetle as measured at the level of the bolt.

scholarly journals Effects of winter warming on cold hardiness and spring budbreak of four boreal conifers

Botany ◽  
2016 ◽  
Vol 94 (2) ◽  
pp. 117-126 ◽  
Author(s):  
Rongzhou Man ◽  
Steve Colombo ◽  
Pengxin Lu ◽  
Qing-Lai Dang
Keyword(s):  
Picea Glauca ◽  
Pinus Banksiana ◽  
Cold Hardiness ◽  
Black Spruce ◽  
Lodgepole Pine ◽  
Temperature Fluctuations ◽  
White Spruce ◽  
Jack Pine ◽  
Experimental Warming ◽  
Freezing Damage

Compared with the effects of spring frosts on opening buds or newly flushed tissues, winter freezing damage to conifers, owing to temperature fluctuations prior to budbreak, is rare and less known. In this study, changes in cold hardiness (measured based on electrolyte leakage and needle damage) and spring budbreak were assessed to examine the responses of four boreal conifer species — black spruce (Picea mariana (Mill.) B.S.P.), white spruce (Picea glauca) (Moench) Voss), jack pine (Pinus banksiana Lamb.), and lodgepole pine (Pinus contorta Dougl. ex. Loud.) — to different durations of experimental warming (16 °C day to –2 °C night with a 10 h photoperiod, except for night temperatures during November warming (+2 °C)). Seedlings showed increased responses to warming from November to March, while the capacity to regain the cold hardiness lost to warming decreased during the same period. This suggests an increasing vulnerability of conifers to temperature fluctuations and freezing damage with the progress of chilling and dormancy release from fall to spring. Both lodgepole pine and jack pine initiated spring growth earlier and had greater responses to experimental warming in bud phenology than black spruce and white spruce, suggesting a greater potential risk of frost/freezing damage to pine trees in the spring.

Distribution of Pine (Pinus spp.) in the South Nahanni and Flat Rivers Region, Northwest Territories

1974 ◽  
Vol 4 (4) ◽  
pp. 555-557 ◽  
Author(s):  
George W. Scotter
Keyword(s):  
Northwest Territories ◽  
Lodgepole Pine ◽  
Rocky Mountain ◽  
Jack Pine ◽  
The South ◽  
Pinus Spp

Specimens of jack pine (Pinusbanksiana Lamb.), Rocky Mountain lodgepole pine (Pinuscontorta spp. latifolia (Engelm.) Critchfield) and hybrids of those two species were collected in the South Nahanni and Flat Rivers region. Those collections extend the previously known range of pines within that region.

scholarly journals Modularity of Conifer Diterpene Resin Acid Biosynthesis: P450 Enzymes of Different CYP720B Clades Use Alternative Substrates and Converge on the Same Products

2016 ◽  
Vol 171 (1) ◽  
pp. 152-164 ◽  
Author(s):  
Katrin Geisler ◽  
Niels Berg Jensen ◽  
Macaire M.S. Yuen ◽  
Lina Madilao ◽  
Jörg Bohlmann
Keyword(s):  
Resin Acid ◽  
Acid Biosynthesis ◽  
Alternative Substrates
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