The effects of Laccaria proxima and fibrous pulp waste on the growth of nine container-grown conifer seedling species

Mycorrhiza ◽  
1996 ◽  
Vol 6 (2) ◽  
pp. 137-143 ◽  
Author(s):  
De-Wei Li
Keyword(s):  
Laccaria Proxima ◽  
Conifer Seedling

Soil compaction and organic matter affect conifer seedling nonmycorrhizal and ectomycorrhizal root tip abundance and diversity.

1996 ◽  
Author(s):  
Michael P. Amaranthus ◽  
Debbie Page-Dumroese ◽  
Al Harvey ◽  
Efren Cazares ◽  
Larry F. Bednar
Keyword(s):  
Organic Matter ◽  
Soil Compaction ◽  
Root Tip ◽  
Abundance And Diversity ◽  
Conifer Seedling

Influence of sulfometuron methyl on conifer seedling root development

New Forests ◽  
2008 ◽  
Vol 37 (1) ◽  
pp. 85-97 ◽  
Author(s):  
Owen T. Burney ◽  
Douglass F. Jacobs
Keyword(s):  
Root Development ◽  
Sulfometuron Methyl ◽  
Seedling Root ◽  
Conifer Seedling

Response of Gaultheria shallon and Epilobium angustifolium to large additions of nitrogen and phosphorus fertilizer

2004 ◽  
Vol 34 (2) ◽  
pp. 502-506 ◽  
Author(s):  
Jennifer N Bennett ◽  
Brent M Lapthorne ◽  
Leandra L Blevins ◽  
Cindy E Prescott
Keyword(s):  
Seedling Survival ◽  
Tsuga Heterophylla ◽  
Thuja Plicata ◽  
Ground Vegetation ◽  
N Availability ◽  
Gaultheria Shallon ◽  
Nitrogen And Phosphorus ◽  
N Application ◽  
Epilobium Angustifolium ◽  
Conifer Seedling

A study was established in coastal British Columbia to determine if repeated nitrogen (N) and phosphorus (P) fertilization negatively influences the reestablishment of salal (Gaultheria shallon Pursh) on cleared and burned cedar–hemlock (Thuja plicata Donn ex D. Don – Tsuga heterophylla (Raf.) Sarg.) forests. Fertilizers were applied for 3 years, and the biomass of ground vegetation and conifer seedling survival and growth were measured. Salal biomass decreased with high levels of N application (1000 kg N/ha), but not when 400 kg P/ha was added with 1000 kg N/ha. The addition of 500 kg N/ha, with or without P, stimulated salal growth. The biomass of fireweed (Epilobium angusti folium L.) increased with the addition of N + P but not with N alone. In the high N and N + P treatments, conifer seedling survival and heights were reduced. These results confirm earlier reports that salal responds negatively to high N applications and that this negative response can be alleviated with simultaneous additions of P. The response of fireweed to N + P, but not to N alone, suggests that the abundance of this species is more indicative of P than N availability.

scholarly journals EFEITO DA PLANTA MATRIZ, ESTAÇÃO DO ANO E AMBIENTE DE CULTIVO NA MINIESTAQUIA DE Pinus radiata

FLORESTA ◽  
2014 ◽  
Vol 45 (1) ◽  
pp. 65 ◽  
Author(s):  
Paula Rachel Rabelo Corrêa ◽  
Bruno Schultz ◽  
Celso Garcia Auer ◽  
Antonio Rioyei Higa
Keyword(s):  
Pinus Radiata ◽  
Basal Region ◽  
Seedling Production ◽  
Rooted Cuttings ◽  
The Matrix ◽  
Plant Grown ◽  
Superior Genotypes ◽  
Collection Point ◽  
Conifer Seedling ◽  
Cutting Production

A estaquia de genótipos superiores de Pinus radiata é uma prática comum na silvicultura. Para sua utilização no Brasil, protocolos de propagação precisam ser estabelecidos. Este trabalho avaliou a miniestaquia aplicada à produção de mudas da espécie, estudando a posição de coleta de broto na planta matriz, a estação do ano e o minijardim. Plantas matrizes seminais, com 1 m de altura e 1,5 anos de idade, foram utilizadas para a produção de miniestacas. Três ensaios consecutivos foram feitos: (i) o enraizamento das miniestacas coletadas de três posições nas matrizes (topo, intermediário e basal), (ii) a influência do minijardim (vaso, canaletão e campo) no desenvolvimento de minicepas e (iii) o efeito da estação do ano (inverno, primavera e verão) sobre o desenvolvimento de miniestacas coletadas de minicepas no canaletão, no vaso e em campo. As miniestacas coletadas da região intermediária das matrizes, com 1,5 anos de idade, apresentaram maior enraizamento do que as coletadas no topo e na região basal. As melhores estações para o desenvolvimento dos brotos foram inverno e primavera, em ambientes de vaso e campo. O verão promoveu melhor desenvolvimento das miniestacas em casa de vegetação, a partir de matrizes cultivadas em canaletão.Palavras-chave: Clonagem; conífera; produção de muda; propagação vegetativa. AbstractEffect of matrix plant, season and minigarden on Pinus radiata minicutting. Cutting of superior genotypes of Pinus radiata is current in forestry. For such practice in Brazil, protocols of propagation need to be established. We evaluated the mini-cutting applied to seedling production, focusing the collection point in matrix plant, season, and minigarden. We used seminal matrix 1 m height and 1.5 years old for mini-cutting production. Three consecutive trials were made: (i) the rooting of mini-cuttings collected from three points in the matrix (top, intermediate and basal), (ii) the influence of minigarden (pot, gutters and field) in development of rooted, and (iii) the effect of season (winter, spring and summer) on the development of rooted cuttings collected in pot, gutters and field. The mini-cuttings collected from the intermediate region of the 1.5 years old seedlings matrices had higher rooting than those collected from the top and basal region. The best time for the development of buds was winter and spring in pots as well as field environments. Summer promoted the best development of mini-cuttings, in greenhouse, from matrix plant grown in gutters.Keywords: Cloning; conifer; seedling production, vegetative propagation.

scholarly journals Selection of Sphingomonadaceae at the Base of Laccaria proxima and Russula exalbicans Fruiting Bodies

2009 ◽  
Vol 75 (7) ◽  
pp. 1979-1989 ◽  
Author(s):  
F. G. Hidde Boersma ◽  
Jan A. Warmink ◽  
Fernando A. Andreote ◽  
Jan Dirk van Elsas
Keyword(s):  
Ectomycorrhizal Fungi ◽  
Denaturing Gradient Gel Electrophoresis ◽  
Bulk Soil ◽  
Fruiting Bodies ◽  
Community Structures ◽  
Specific Pcr ◽  
Laccaria Proxima ◽  
The Family ◽  
Gradient Gel Electrophoresis ◽  
Selection Of

ABSTRACT The dense hyphal network directly underneath the fruiting bodies of ectomycorrhizal fungi might exert strong influences on the bacterial community of soil. Such fruiting bodies might serve as hot spots for bacterial activity, for instance by providing nutrients and colonization sites in soil. Here, we assessed the putative selection of specific members of the Sphingomonadaceae family at the bases of the fruiting bodies of the ectomycorrhizal fungi Laccaria proxima and Russula exalbicans in comparison to the adjacent bulk soil. To do so, we used a previously designed Sphingomonadaceae-specific PCR-denaturing gradient gel electrophoresis (DGGE) system and complemented this with analyses of sequences from a Sphingomonadaceae-specific clone library. The analyses showed clear selective effects of the fruiting bodies of both fungi on the Sphingomonadaceae community structures. The effect was especially prevalent with R. exalbicans. Strikingly, similar fungi sampled approximately 100 m apart showed similar DGGE patterns, while corresponding bulk soil-derived patterns differed from each other. However, the mycospheres of L. proxima and R. exalbicans still revealed divergent community structures, indicating that different fungi select for different members of the Sphingomonadaceae family. Excision of specific bands from the DGGE patterns, as well as analyses of the clone libraries generated from both habitats, revealed fruiting body-specific Sphingomonadaceae types. It further showed that major groups from the mycospheres of R. exalbicans and L. proxima did not cluster with known bacteria from the database, indicating new groups within the family of Sphingomonadaceae present in these environments.

Mixed-conifer seedling growth varies in response to overstory release

1992 ◽  
Vol 48 (1-2) ◽  
pp. 179-183 ◽  
Author(s):  
William W. Oliver ◽  
K. Leroy Dolph
Keyword(s):  
Seedling Growth ◽  
Mixed Conifer ◽  
Conifer Seedling
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