Screening jack pine seedlings for resistance to Cronartiumquercuum f.sp. banksianae and Endocronartiumharknessii

1989 ◽  
Vol 19 (12) ◽  
pp. 1642-1644 ◽  
Author(s):  
T. A. Burnes ◽  
R. A. Blanchette ◽  
W. K. Stewart ◽  
C. A. Mohn
Keyword(s):  
Jack Pine ◽  
Rust Fungi ◽  
The Other ◽  
Seed Sources ◽  
Pine Seedlings

Jack pine (Pinusbanksiana Lamb.) seedlings grown from nine seed lots were tested for resistance to two different gall rusts, Cronartiumquercuum (Berk.) Miyable ex. Shirai f.sp. banksianae Burdsall and Snow and Endocronartiumharknessii (J.P. Moore) Y. Hiratsuka. Resistance to C. quercuum f.sp. banksianae or E. harknessii was found among the seed sources tested. Resistance to one rust was not correlated with resistance to the other. Several seed sources were intermediately resistant to both rust fungi. The results demonstrate the need to screen for resistance to both gall rust fungi if seedlings are to be planted in an area where the two rusts are present.

The effect of sonication on the growth of some tree seeds

1981 ◽  
Vol 11 (4) ◽  
pp. 840-844 ◽  
Author(s):  
Pearl Weinberger ◽  
C. Burton
Keyword(s):  
Tree Species ◽  
Peak Velocity ◽  
Jack Pine ◽  
Red Pine ◽  
The Other ◽  
Pine Seedlings ◽  
Length Range ◽  
Percent Germination ◽  
Tree Seeds ◽  
All Treatment

Air-dry seeds of jack pine (Pinusbanksiana Lamb.), red pine (P. resinosa Ait.), tamarack (Larixeuropaea L.), and white spruce (Piceaglauca (Moench) Voss) were subjected for 30 min to 1 MHz ultrasound at one of three intensities of ultrasound ranging from 0.5 to 6.0 W/cm2. Subsequent germination was assessed in terms of percent germination, mean daily germination (MDG), and peak velocity of germination (PV). From these, germination values (GV) were obtained. Only jack pine responded to the ultrasonic treatments by giving rise to higher MDG and GV values. The seeds were equally stimulated by all the intensities used. The rates and percent germination of the other tree species were unaffected by any of the sonication treatments. Seeds of jack pine were also sonicated at 25, 50, 100, 250, and 750 kHz at an intensity in the range of 0.5–1.0 W/cm2. None of these treatments affected the course of germination.Subsequent seedling growth of all the seeds in all treatment sets was also monitored by summing the total length of all the seedlings following 8 and 14 days of growth. The seedlings were divided into five length-range categories. The jack pine seedlings alone, sonicated at 1 MHz, had significantly more seedlings in the larger size group than the untreated seedlings.

Applied gibberellin A4/7 increases ovulate strobili production in accelerated growth jack pine seedlings

1981 ◽  
Vol 11 (3) ◽  
pp. 580-585 ◽  
Author(s):  
Robert A. Cecich
Keyword(s):  
Growth Conditions ◽  
Jack Pine ◽  
Fourfold Increase ◽  
Pine Seedlings ◽  
Accelerated Growth

Jack pine (Pinusbanksiana Lamb.) seeds were sown in October, January, and March, and the seedlings were cultured under accelerated growth conditions in a greenhouse. At biweekly intervals, from May 15 to August 15, they were transplanted to a nearby nursery and sprayed with GA4/7 or GA4/7 + NAA. The following spring a fourfold increase in flowering was noted in trees receiving either of the GA4/7 treatments. Trees in the March sowing did not flower. The data suggest that the increased flowering was caused by GA4/7-mediated differentiation of lateral long-branch primordia into ovulate strobili.

A Canadian Example of Government-Industry Collaboration In Tree Improvement

1976 ◽  
Vol 52 (6) ◽  
pp. 283-289 ◽  
Author(s):  
C. W. Yeatman
Keyword(s):  
Seed Production ◽  
Cold Hardiness ◽  
Seed Orchard ◽  
Jack Pine ◽  
Tree Improvement ◽  
Seed Sources ◽  
Seedling Seed Orchard ◽  
Forest Region ◽  
Future Supply ◽  
High Quality Seed

A program of provenance testing, seed production and genetic improvement of jack pine was developed in the Baskatong region of western Quebec through sustained collaboration among government forest services and forest industry. Research plantations demonstrated, within a period of 10 years from establishment, the superiority in growth, cold hardiness and disease resistance of regionally adapted local seed sources. Critical differences were evident between provenances from the Boreal Forest Region and those from the adjacent Sections of the Great Lakes — St. Lawrence Forest Region.A 300-acre (120 ha) seed production area was created within a genetically superior jack pine population of natural origin in the Côte Jaune area west of Lake Baskatong. Within this population, 325 plus trees were selected, marked and recorded over two years by student crews employed in the summer. Seed harvested from the felled plus trees will be used to create a seedling seed orchard and to establish progeny tests. The plus trees are to be grafted for controlled breeding among selected progeny-tested clones at a later date. This cooperative program of tree improvement will ensure the future supply of high quality seed that will maintain and enhance the value of the forest resource.

Seed-source variation in water relations, gas exchange, and needle morphology of mature ponderosa pine trees

1993 ◽  
Vol 23 (4) ◽  
pp. 749-755 ◽  
Author(s):  
Bert M. Cregg
Keyword(s):  
Gas Exchange ◽  
South Dakota ◽  
Leaf Area ◽  
Water Relations ◽  
Specific Leaf Area ◽  
Ponderosa Pine ◽  
Stomatal Density ◽  
The Other ◽  
Seed Sources ◽  
Needle Morphology

Xylem pressure potential (ψx), net photosynthesis (A), needle conductance (gn), and transpiration (E) were measured periodically throughout the 1991 growing season on 16 ponderosa pine (Pinusponderosa Dougl. ex Laws.) trees growing in a 23-year-old provenance planting in eastern Nebraska. The trees studied were from four diverse sources: western Montana, northwest South Dakota, southern New Mexico, and central Arizona. In addition to water relations and gas exchange, specific leaf area, stomatal density, and surface to volume ratios were determined on 1-year-old foliage of each tree. Compared with the other seed sources, gas exchange of the South Dakota source was lowest early in the summer, when ψx was generally high, and highest in the late summer, when ψx declined. However, the relation of gn to ψx did not appear to differ among the seed sources. The South Dakota source had lower stomatal density and needle length than the other sources tested. No differences in specific leaf area or surface to volume ratio were observed. Overall, variation in physiology and needle morphology among seed sources of mature ponderosa pine appears to be more subtle than intraspecific variation of seedlings of other species reported in the literature.

Container Volume Affects Survival and Growth of White Spruce, Black Spruce, and Jack Pine Seedlings: A Literature Review

1988 ◽  
Vol 5 (3) ◽  
pp. 185-189 ◽  
Author(s):  
D. Craig Sutherland ◽  
Robert J. Day
Keyword(s):  
Literature Review ◽  
Seedling Growth ◽  
Black Spruce ◽  
Seedling Survival ◽  
White Spruce ◽  
Jack Pine ◽  
Greenhouse Production ◽  
Production Phase ◽  
Pine Seedlings ◽  
Survival And Growth

Abstract This paper is the first general review of the affects of container volume on the survival and growth of containerized white spruce, black spruce, and jack pine seedlings. The review shows that the literature on this topic is fragmentary and inconsistent. Seedling growth in the greenhouse production phase has been more completely quantified than subsequent establishment and growth after out-planting in the field. In the greenhouse production phase, seedling growth increased from 72 to 360% when the container volume was tripled in size. After outplanting in the field, seedling growth trends were more variable. Seedling height growth increased from 34 to 84% when container volume was tripled in size. Seedling survival was more difficult to assess because of limited data. Only white spruce showed a 10% increase in survival with an increase in container volume. The indications from this literature review suggest that nursery managers and practicing foresters should become more aware of the limitations imposed on seedling survival and growth due to container volume. To maintain optional survival and growth for white spruce, black spruce and jack pine, the container volume should range from 90 to 120 cm3. North. J. Appl. For. 5:185-189, Sept. 1988.

MULTIPLE JACK PINE SEEDLINGS

1965 ◽  
Vol 43 (4) ◽  
pp. 481-482 ◽  
Author(s):  
J. H. Cayford ◽  
R. M. Waldron
Keyword(s):  
Jack Pine ◽  
Pine Seedlings

Production of ectomycorrhizae on container-grown jack pine seedlings

1984 ◽  
Vol 14 (1) ◽  
pp. 33-36 ◽  
Author(s):  
R. M. Danielson ◽  
S. Visser ◽  
D. Parkinson
Keyword(s):  
Jack Pine ◽  
Solid Carrier ◽  
Pine Seedlings ◽  
Mycorrhizal Development

Jack pine (Pinusbanksiana Lamb.) seedlings were grown for 20 weeks in a peat–vermiculite medium inoculated with solid carrier mycelial inoculum. The low fertilizer levels used resulted in seedling sizes below standard for outplanting but permitted mycorrhizal development by 9 of the 12 fungi tested. Greater than 90% of the short roots were infected when seedlings were inoculated with Thelephoraterrestris Ehrhart ex Fr., Laccariaproximo Boudier, Hebeloma sp., or E strain. About half the short roots were infected when Cenococcumgeophilum Fr., Pisolithustinctorius (Pers.) Coker & Couch, and Astraeushygrometricus (Pers.) Morgan were used. Thirty-two and 17% of the short roots were infected by Lactariusparadoxus Beardslee & Burlingham and Sphaerosporellabrunnea (Alb. & Schw. ex Fr.) Svrcek & Kubicka, respectively. Inoculation with Amphinemabyssoides (Fr.) J. Erikss., Hydnumimbricatum L. ex Fr., and Tricholomaflavovirens (Pers. ex Fr.) Lundell resulted in no infection.

The effectiveness of mycelial slurries of mycorrhizal fungi for the inoculation of container-grown jack pine seedlings

1984 ◽  
Vol 14 (1) ◽  
pp. 140-142 ◽  
Author(s):  
R. M. Danielson ◽  
S. Visser ◽  
D. Parkinson
Keyword(s):  
Ectomycorrhizal Fungi ◽  
Mycorrhizal Fungi ◽  
Jack Pine ◽  
Considerable Time ◽  
Pine Seedlings ◽  
Inoculum Preparation

Mycelial slurries prepared from agar plates of ectomycorrhizal fungi were used to inoculate 7-week-old container-grown jack pine. Seven of 15 species formed mycorrhizae after 18 weeks and included Thelephoraterrestris Ehrhart ex Fr., Laccariaproximo Boudier, Hebeloma sp., Pisolithustinctoris (Pers.) Coker & Couch, Sphaerosporellabrunnea (Alb. & Schw. ex Fr.) Svrcek & Kubicka, Cenococcwngeophilum Fr., and an E strain (sensu Mikola) isolate. Species of Tricholoma, Suillus, Amphinema, and Hydnum failed to form mycorrhizae. The use of a mycelial slurry has the advantage of saving considerable time in inoculum preparation and should be useful for experimental purposes.

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