Establecimiento de plantaciones forestales. Pinus radiata. Pinus ponderosa. Pseudotsuga menziesii

Mapping Intimacies ◽

10.52904/20.500.12220/6452 ◽

2000 ◽

Author(s):

Edison García Rivas ◽

◽

Sandra Eliana Silva Pérez ◽

Alvaro Sotomayor Garretón ◽

Gerardo Andrés Valdebenito Rebolledo

Keyword(s):

Pseudotsuga Menziesii ◽

Pinus Radiata ◽

Pinus Ponderosa

Este documento es parte de una serie que pretende dar a conocer en forma sencilla y clara el procedimiento a seguir para el adecuado establecimiento de una plantación. así como los aspectos básicos que se deben tener presentes para que la decisión de forestar sea aplicable y adecuada a los objetivos deseados.

Download Full-text

Infection of Select Pinaceae and Cupressaceae Seedlings to Phytophthora pinifolia

Plant Health Progress ◽

10.1094/php-02-19-0011-rs ◽

2019 ◽

Vol 20 (2) ◽

pp. 106-111

Author(s):

Timothy L. Widmer ◽

Stephen C. Dodge

Keyword(s):

United States ◽

At Risk ◽

Pseudotsuga Menziesii ◽

Loblolly Pine ◽

Pinus Radiata ◽

Pinus Elliottii ◽

The United States ◽

Douglas Fir ◽

Important Species ◽

Monterey Pine

Phytophthora pinifolia caused a devastating disease on Monterey pine (Pinus radiata) in Chile. This pathogen has not been reported in the United States, but there is concern should it arrive. There is little information regarding other hosts besides Monterey pine that may be susceptible to this pathogen. In the present study, other potential hosts within the Pinaceae and Cupressaceae were inoculated with zoospores of P. pinifolia and observed for symptoms and infection after 4 weeks. Similar to Monterey pine, knobcone (Pinus attenuata), bishop (P. muricata), and ponderosa (P. ponderosa) pines were highly infectious, whereas several important species such as loblolly pine (P. taeda) and Douglas fir (Pseudotsuga menziesii) showed no infection. P. pinifolia was also not recovered from slash (Pinus elliottii) and eastern white (P. strobus) pines. This study is important because it demonstrates other economically important tree hosts are at risk by P. pinifolia, should it enter the United States.

Download Full-text

Comparative genetic responses to climate in the varieties of Pinus ponderosa and Pseudotsuga menziesii: Clines in growth potential

Forest Ecology and Management ◽

10.1016/j.foreco.2014.02.041 ◽

2014 ◽

Vol 324 ◽

pp. 138-146 ◽

Cited By ~ 31

Author(s):

Gerald E. Rehfeldt ◽

Laura P. Leites ◽

J. Bradley St Clair ◽

Barry C. Jaquish ◽

Cuauhtémoc Sáenz-Romero ◽

...

Keyword(s):

Pseudotsuga Menziesii ◽

Pinus Ponderosa ◽

Growth Potential ◽

Genetic Responses

Download Full-text

The Extractives of the Mycorrhizas and Roots of Pinus Radiata and Pseudotsuga Menziesii

Australian Journal of Biological Sciences ◽

10.1071/bi9691425 ◽

1969 ◽

Vol 22 (6) ◽

pp. 1425 ◽

Cited By ~ 18

Author(s):

WE Hills ◽

N Ishikura

Keyword(s):

Pseudotsuga Menziesii ◽

Pinus Radiata ◽

Outer Layer ◽

Fast Growing

The amounts of acetone extractives from mycorrhizas and their polyphenolic portion were variable over a 6�month period. During August the amounts of extrac� tives and polyphenols were higher in slow� than in fast-growing Pinus radiata seedlings. The amount of extractives in the roots were greater than those in the mycorrhizas but in the latter the polyphenols were concentrated in the outer layer. The composition of the mycorrhizal and root extractives of P. radiata were very similar and in addition to resin contained catechin, two components that are very similar to 3,5,3',4'.tetrahydroxystilbene and one of its glucosides, and leucocyanidin polymers. The mycorrhizas of Pseudotsuga menziesii contain 15 components, includ� ing catechin, epicatechin, leucocyanidin polymers, and a polyene. With the exception of the latter the roots of Ps. menziesii contained the same components and in addition poriolin, poriol, taxifolin, taxifolin-3�glucoside, and quercetin.3.glucoside. Evidence supports the view that the polyphenols are formed in situ and appear to be formed in enhanced amounts in the tannin layer of mycorrhizas. Their possible role in the establishment of mycorrhizas is discussed.

Download Full-text

Diversity and host specificity of ectomycorrhizal fungi retrieved from three adjacent forest sites by five host species

Canadian Journal of Botany ◽

10.1139/b99-115 ◽

1999 ◽

Vol 77 (8) ◽

pp. 1053-1076 ◽

Cited By ~ 15

Author(s):

H B Massicotte ◽

R Molina ◽

L E Tackaberry ◽

J E Smith ◽

M P Amaranthus

Keyword(s):

Pseudotsuga Menziesii ◽

Pinus Ponderosa ◽

Ponderosa Pine ◽

Host Species ◽

Ectomycorrhizal Fungus ◽

Douglas Fir ◽

Abies Grandis ◽

Forest Sites ◽

Fungal Propagules ◽

Arbutus Menziesii

Seedlings of Abies grandis (Dougl.) Lindl. (grand fir), Lithocarpus densiflora (Hook. & Arn.) Rehd. (tanoak), Pinus ponderosa Dougl. ex Laws. (ponderosa pine), Pseudotsuga menziesii (Mirb.) Franco (Douglas-fir), and Arbutus menziesii Pursh (madrone) were planted in mixture and monoculture in soil collected from three adjacent forest sites in southwestern Oregon (a clearcut area, a 25-year-old Douglas-fir plantation, and a mature 90- to 160-year-old Douglas-fir - pine forest) to determine the effect of host tree diversity on retrieval of ectomycorrhizal morphotypes. In this greenhouse bioassay, 18 morphotypes of mycorrhizae were recognized overall from all soils with a total of 55 host-fungus combinations: 14 types with ponderosa pine, 14 with Douglas-fir, 10 with tanoak, 10 with grand fir, and 7 for madrone. Four genus-specific morphotypes were retrieved (three on ponderosa pine and one on Douglas-fir), even in mixture situations, demonstrating selectivity of some fungal propagules by their respective host. Five types were detected on all hosts, but not necessarily in soils from all sites. The remaining nine types were associated with two, three, or four hosts, which indicates a wide potential for interspecific hyphal linkages between trees. More morphotypes were retrieved from the monoculture treatments compared with the mixture treatments, although the differences were not significant. Several examples of acropetal replacement of one fungus by another (interpreted as succession) were recorded on all hosts during the course of the experiment. These results illustrate the importance of different host species in maintaining ectomycorrhizal fungus diversity, especially fungi with restricted host range, and the strong potential for fungal linkages between trees in forest ecosystems.Key words: fungal succession, fungal communities, compatibility, Arbutus menziesii, Pseudotsuga menziesii, Pinus ponderosa, Abies grandis, Lithocarpus densiflora.

Download Full-text

Effects of fuel morphology on ember generation characteristics at the tree scale

International Journal of Wildland Fire ◽

10.1071/wf19182 ◽

2020 ◽

Vol 29 (11) ◽

pp. 1042

Author(s):

Tyler R. Hudson ◽

Ryan B. Bray ◽

David L. Blunck ◽

Wesley Page ◽

Bret Butler

Keyword(s):

Mass Loss ◽

Pseudotsuga Menziesii ◽

Pinus Ponderosa ◽

Ponderosa Pine ◽

Douglas Fir ◽

Biological Factors ◽

Abies Grandis ◽

Western Juniper ◽

Juniperus Occidentalis ◽

Spot Fires

This work reports characteristics of embers generated by torching trees and seeks to identify the important physical and biological factors involved. The size of embers, number flux and propensity to ignite spot fires (i.e. number flux of ‘hot’ embers) are reported for several tree species under different combinations of number (one, three or five) and moisture content (11–193%). Douglas-fir (Pseudotsuga menziesii), grand fir (Abies grandis), western juniper (Juniperus occidentalis) and ponderosa pine (Pinus ponderosa) trees were evaluated. Embers were collected on an array of fire-resistant fabric panels and trays filled with water. Douglas-fir trees generated the highest average ember flux per kilogram of mass loss during torching, whereas grand fir trees generated the highest ‘hot’ ember flux per kilogram of mass loss. Western juniper produced the largest fraction of ‘hot’ embers, with ~30% of the embers generated being hot enough to leave char marks. In contrast, only 6% of the embers generated by ponderosa pine were hot enough to leave char marks. Results from this study can be used to help understand the propensity of different species of tree to produce embers and the portion of embers that may be hot enough to start a spot fire.

Download Full-text