Survival and growth of pines with specific ectomycorrhizae after 3 years on a highly eroded site

1986 ◽  
Vol 64 (4) ◽  
pp. 885-888 ◽  
Author(s):  
Maria Valdés
Keyword(s):  
Potential Benefit ◽  
Pisolithus Tinctorius ◽  
Stem Diameter ◽  
Laccaria Laccata ◽  
Vegetative Mycelium ◽  
Average Volume ◽  
Pine Seedlings ◽  
Survival And Growth

Container-grown pine seedlings inoculated with vegetative mycelium of Pisolithus tinctorius, Laccaria laccata, or P. tinctorius plus the saprophytic Lepiota lutea were outplanted on a highly eroded reforestation site in Mexico. After 3 years, seedlings initially colonized by P. tinctorius plus L. lutea had the highest survival. Seedlings with P. tinctorius mycorrhizae (either alone or with L. lutea) had greater height, stem diameter, and seedling volume than both seedlings with L. laccata mycorrhizae and noninoculated seedlings. The average volume of seedlings with P. tinctorius or with P. tinctorius plus L. lutea was 538 and 423%, respectively, of that of noninoculated seedlings. The potential benefit of utilizing P. tinctorius inoculum in reforestation programs in Mexico is discussed.

scholarly journals Naturally Seeded versus Planted Ponderosa Pine Seedlings in Group-Selection Openings

2009 ◽  
Vol 24 (1) ◽  
pp. 48-54 ◽  
Author(s):  
Philip M. McDonald ◽  
Gary Fiddler ◽  
Martin Ritchie ◽  
Paula Anderson
Keyword(s):  
Growth Rate ◽  
Plant Community ◽  
Ponderosa Pine ◽  
Natural Regeneration ◽  
Group Selection ◽  
Average Density ◽  
Stem Diameter ◽  
Diameter Growth ◽  
Pine Seedlings ◽  
Survival And Growth

Abstract The purpose of this article was to determine whether natural regeneration or planted seedlings should be used in group-selection openings. The answer depends on the survival and growth rate of both types of seedlings, and that could depend on the size of the openings and the effect of trees on their edge. In this side-by-side study, the natural pine seedlings originated from the 1988 seed crop and the 1–0 nursery-grown seedlings were outplanted in spring 1989. Openings ranged from 0.01 to 0.65 ha. The plant community consisted of many species of shrubs, forbs, and grasses with manzanita having the highest density and greatest development. After 9 years, manzanita had an average density of 13,870 plants/ha, 2,050 m2/ha of foliar cover, and was 125 cm tall. From 1990 to 1997, planted ponderosa pine seedlings were taller (P < 0.05) than natural seedlings, and from 1995 to 1997, mean stem diameter at 30 cm of planted seedlings was larger than natural counterparts (P < 0.05). Development for 1 year in the nursery apparently gave the planted seedlings a growth advantage over the natural seedlings. For natural seedlings, distance from opening edge had little effect on pine height or diameter growth regardless of opening size. Planted seedlings, however, appeared to increase in height and diameter growth with both opening size and distance from edge.

The Effects of Benomyl and Pisolithus Tinctorius Ectomycorrhizae on Survival and Growth of Longleaf Pine Seedlings

1981 ◽  
Vol 5 (4) ◽  
pp. 189-195 ◽  
Author(s):  
Albert G. Kais ◽  
Glenn A. Snow ◽  
Donald H. Marx
Keyword(s):  
Longleaf Pine ◽  
Pinus Palustris ◽  
Height Growth ◽  
Pisolithus Tinctorius ◽  
Brown Spot ◽  
Spot Disease ◽  
Brown Spot Disease ◽  
Pine Seedlings ◽  
Collar Diameter ◽  
Survival And Growth

Abstract Benomyl applied to roots of longleaf pine (Pinus palustris Mill.) seedlings at planting significantly reduced brown-spot disease and increased survival, root collar diameter, and early height growth on two sites in Mississippi. Seedlings with half or more of all ectomycorrhizae formed by Pisolithus tinctorius (Pers.) Coker and Couch in the nursery had significantly better survival and growth; Pisolithus ectomycorrhizae did not appreciably affect brown-spot disease. The benefits of benomyl and Pisolithus ectomycorrhizae were most obvious when combined. More than 75 percent of seedlings treated with benomyl and with more than half of all ectomycorrhizae formed by Pisolithus initiated height growth after 3 years. Forty-seven percent of seedlings with only Thelephora terrestris ectomycorrhizae and without benomyl exhibited height growth. The combined use of benomyl to control brown-spot disease and Pisolithus ectomycorrhizae to stimulate early height growth may overcome the major handicaps that have limited artificial regeneration of longleaf pine in the South.

Ectomycorrhizal Inoculation of Containerized Douglas-fir and Lodgepole Pine Seedlings with Six Isolates of Pisolithus tinctorius

1979 ◽  
Vol 25 (4) ◽  
pp. 585-590
Author(s):  
Randy Molina
Keyword(s):  
Lodgepole Pine ◽  
Ectomycorrhizal Fungus ◽  
Douglas Fir ◽  
Pisolithus Tinctorius ◽  
Seedling Height ◽  
Vegetative Mycelium ◽  
Pine Seedlings ◽  
Specific Strain ◽  
Wide Scale ◽  
Inoculation Treatment

Abstract Containerized Douglas-fir and lodgepole pine seedlings grown under lowered fertility were inoculated with vegetative mycelium from six isolates of the ectomycorrhizal fungus Pisolithus tinctorius. The isolates differed both culturally and in effectiveness as ectomycorrhizal inoculum. The percent of seedlings successfully inoculated and percent of feeder roots colonized differed significantly among the isolates. Analysis of variance, however, for seedling height, stem diameter, stem and root dry weights, and top/root ratio showed no significant differences between any inoculation treatment and controls for either tree species. This study reinforces the concept that a wide array of fungus ecotypes should be tested before a specific strain is selected for wide-scale nursery inoculations. Forest Sci. 25:585-590.

Effect of Bearmat (Chamaebatia foliolosa) on Soil Moisture and Ponderosa Pine (Pinus ponderosa) Growth

Weed Science ◽  
1982 ◽  
Vol 30 (1) ◽  
pp. 98-101 ◽  
Author(s):  
John C. Tappeiner ◽  
Steven R. Radosevich
Keyword(s):  
Acetic Acid ◽  
Soil Moisture ◽  
Pinus Ponderosa ◽  
Ponderosa Pine ◽  
Tree Height ◽  
Wood Production ◽  
Pine Seedlings ◽  
Survival And Growth ◽  
Dichlorophenoxy Acetic Acid

An experiment was established in 1961 to determine the influence of bearmat (Chamaebatia foliolosa Benth.) competition on ponderosa pine (Pinus ponderosa Laws.) survival and growth. Ponderosa pine seedlings were planted in bearmat which was: (A) untreated, (B) sprayed with a mixture of 2,4-D [(2,4-dichlorophenoxy)acetic acid] and 2,4,5-T [(2,4,5-trichlorophenoxy)acetic acid], and (C) eliminated by a combination of herbicide, clipping sprouts, and trenching to prevent root and rhizome invasion. Ponderosa pine survival after 19 yr averaged 9%, 66%, and 90%, respectively, for the three treatments. Tree height after 19 yr averaged 1.6, 1.9, and 5.7 m for treatments A, B, and C, respectively. Soil moisture use was initially less on the herbicide-treated than on the untreated plots, but bearmat quickly sprouted after application to compete with the pine seedlings for moisture. After 19 yr the bearmat was more dense and appeared to be more vigorous on the sprayed plots than on those receiving no treatment. We estimate that 75% reduction in net wood production could result after 50 yr on this site from bearmat competition.

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.

scholarly journals Overstory Density Affects Field Performance of Underplanted Red Oak (Quercus rubra L.) in Ontario

1997 ◽  
Vol 14 (3) ◽  
pp. 120-125 ◽  
Author(s):  
Daniel C. Dey ◽  
William C. Parker
Keyword(s):  
Seedling Survival ◽  
Field Performance ◽  
Dry Mass ◽  
Stem Diameter ◽  
Red Oak ◽  
Light Levels ◽  
Competitive Disadvantage ◽  
Closed Canopy ◽  
Survival And Growth ◽  
And Performance

Abstract Red oak seedlings were underplanted in a closed-canopy mature northern hardwood stand and an adjacent shelterwood in central Ontario. Overstory density effects on seedling survival and growth were assessed 2 yr after planting. After 2 yr, seedling survival was 90% in the uncut stand and over 99% in the shelterwood. Seedlings in the uncut stand experienced negligible or negative annual increments in stem diameter and height. Seedlings in the shelterwood were about 2 mm larger in diameter and nearly twice as tall as those in the uncut stand after 2 yr. Second-year stem diameter and height distributions of planted oak were significantly different in the shelterwood and the uncut stand. Root volume, area, and dry mass were substantially larger for seedlings grown in the shelterwood than those in the uncut stand. Loss of vigor, growth declines, and increased mortality of planted oak were largely a result of extremely low understory light levels in the uncut stand. Results of this study suggest that red oak underplanted in an uncut stand 2 or more years before a shelterwood harvest will be at a competitive disadvantage once they are released. Establishment and performance of underplanted red oak is promoted by shelterwoods that provide adequate light at the forest floor and should exhibit a strong positive growth response following final overstory removal. North. J. Appl. For. 14(3):120-125

Inoculation of Nursery Seedbeds with Pisolithus Tinctorius Spores Mixed with Hydromulch Increases Ectomycorrhizae and Growth of Loblolly Pines

1979 ◽  
Vol 3 (4) ◽  
pp. 175-178 ◽  
Author(s):  
Donald H. Marx ◽  
John G. Mexal ◽  
William G. Morris
Keyword(s):  
Loblolly Pine ◽  
Pisolithus Tinctorius ◽  
Pine Seedlings ◽  
Loblolly Pines

Abstract Different methods of introducing basidiospores (4/5 oz. spores/100 linear ft. of nursery bed) of Pisolithus tinctorius into fumigated soil at Weyerhaeuser's nursery in Oklahoma were tested to determine their effectiveness in forming ectomycorrhizae on loblolly pine seedlings. Two of five methods proved significantly effective. Nearly three-fourths of seedlings treated with spores mixed in hydromulch and applied after sowing formed Pisolithus ectomycorrhizae. The result was 25 percent larger seedlings and 15 percent fewer culls. In plots where spores were dusted onto the soil at sowing, one-third of the seedlings formed Pisolithus ectomycorrhizae, resulting in 12 percent larger seedlings and 13 percent fewer culls.

Nitrogen source effects on Al toxicity in nonmycorrhizal and mycorrhizal pitch pine (Pinus rigida) seedlings. II. Nitrate reduction and NO3− uptake

1990 ◽  
Vol 68 (12) ◽  
pp. 2653-2659 ◽  
Author(s):  
Jonathan R. Cumming
Keyword(s):  
Nitrogen Source ◽  
Nitrate Reduction ◽  
Al Toxicity ◽  
Pisolithus Tinctorius ◽  
Sand Culture ◽  
Root Tips ◽  
Pinus Rigida ◽  
Pine Seedlings ◽  
Pitch Pine ◽  
Nr Activity

Nitrogen source utilization, mediated by the ectomycorrhizal symbiont Pisolithus tinctorius, may modulate Al toxicity in pitch pine (Pinus rigida) seedlings. Nitrate reduction, occurring primarily in the roots of pitch pine seedlings, represents a critical metabolic pathway that may be directly sensitive to Al or indirectly affected by changes in NO3− availability associated with Al exposure or mycorrhizal infection. To investigate these possibilities, pitch pine seedlings were grown in sand culture with NO3−, NH4NO3, or NH4+ and exposed to 0 or 200 μM Al for 6 weeks. Foliar N concentrations, root nitrate reductase (NR) activity, and Al inhibition of NR activity were highly dependent on the proportion of NO3− of the nutrient solution. The association of Pisolithus tinctorius with seedling roots reduced both root and foliar NR activity compared with non-inoculated controls, suggesting that NO3− uptake and translocation to foliage was reduced by the symbiont. This was confirmed by using 36ClO3− to measure unidirectional plasma membrane NO3− fluxes. Mycorrhizal root tips absorbed 50% less NO3− than nonmycorrhizal root tips. Preferential use of NH4+ by ectomycorrhizal roots may thus result in reduced movement of Al into root tissue and amelioration of Al toxicity. Key words: Pinus rigida, ectomycorrhizae, aluminum toxicity, nitrogen source.

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