scholarly journals Cuantificación de hongos micorrícicos en muestras de suelo en plantaciones de Tabebuia rosea y Cordia alliodora

Nova ◽  
2007 ◽  
Vol 5 (7) ◽  
pp. 38
Author(s):  
Jairo Leonardo Cuervo Andrade PhD ◽  
Gonzalo G. Rivas P.
Keyword(s):  
Costa Rica ◽  
Central America ◽  
Mycorrhizal Fungi ◽  
Microscopic Observation ◽  
Growth And Development ◽  
Low Cost ◽  
Cordia Alliodora ◽  
Ground Sample ◽  
Tabebuia Rosea ◽  
Tree Production

The tropical grounds show great restrictions for tree production after they have been used and over-exploited by man. A strategy to increase the levels of production is based on the fertilization according to the requirements of the trees. As mycorrhization is a biological low cost alternative that can contribute to the success of the reforestation, we wanted to establish how it was possible to favor the surviving and growth of arboreal species in green houses by means of the quantification of mycorrhizal fungi using ground samples in the species <em>Tabebuia rosea </em>and <em>Cordia alliodora </em>in different localities from Costa Rica, Central America.<p>Samples in ten different sites were analyzed and the quantification of spores was made by sifting. The percentage of colonization by roots was considered at microscopic observation by roots according to methodology of Sieverding. The results obtained in this investigation concluded that from the variety of the present sorts of <em>Micorrizas Vesiculo Arbusculares </em>in the ground sample those that demonstrated better behavior with <em>Tabebuia rosea </em>and <em>Cordia alliodora </em>were <em>Glomus </em>sp. and <em>Gigaspora </em>sp. In addition, to obtain a greater growth and development of the trees, it is necessary to favor the mycorrhizal population in the plants within their first days of birth.</p>

Subsurface flow reedbeds using alternative media for the treatment of domestic greywater in Monteverde, Costa Rica, Central America

2005 ◽  
Vol 51 (10) ◽  
pp. 119-128 ◽  
Author(s):  
S. Dallas ◽  
G. Ho
Keyword(s):  
Costa Rica ◽  
Central America ◽  
Fecal Coliform ◽  
Low Cost ◽  
Crushed Rock ◽  
Pathogen Removal ◽  
Media Type ◽  
Dry Seasons ◽  
Better Than ◽  
Wet And Dry Seasons

This paper describes the performance of reedbeds using plastic (PET) bottle segments as an alternative low-cost media for the treatment of domestic greywater in Monteverde, Costa Rica, Central America. Twelve reedbeds consisting of four sets of triplicates were monitored through wet and dry seasons in order to determine the effect of media type (PET versus crushed rock) and the effect of plants. In both seasons, performance of the planted reedbeds with PET media, for BOD and fecal coliform removal, was either comparable to, or better than, that of the crushed rock systems. The planted PET reedbeds achieved fecal coliform removal rates &gt;99.9% in all cases equating to reductions of between 3 and nearly 5 log, with an average BOD outflow of 12.9 mg/L over both seasons. The hydraulic loading rate varied between 1.33 and 2.67 cm/day and hydraulic retention times (HRT) ranged from 3.5 to 7.5 days. The six reedbeds planted with Coix lacryma-jobi proved to be significantly more effective in pathogen removal and BOD reduction than the unplanted reedbeds. The planted PET reedbeds also increased their biomass by twice that of the planted crushed rock reedbeds during the study period. The majority of this increase was shown to be due to root growth. This paper discusses the implications of the above results for developing countries and identifies potential areas for further research.

Rediscovery of Choroterpes atramentum in Costa Rica, type species of Tikuna new genus (Ephemeroptera: Leptophlebiidae: Atalophlebiinae), and its role in the "Great American Inter-change"

Zootaxa ◽  
2005 ◽  
Vol 932 (1) ◽  
pp. 1 ◽  
Author(s):  
HARRY M. SAVAGE ◽  
R. WILLS FLOWERS ◽  
WENDY PORRAS V.
Keyword(s):  
Costa Rica ◽  
Central America ◽  
Late Cretaceous ◽  
Type Species ◽  
New Genus ◽  
South American ◽  
Early Tertiary ◽  
Geological Formation

A new genus, Tikuna, is described based on recent collections of adults and nymphs of Choroterpes atramentum Traver from western Costa Rica. All recent collections are from streams on or near the Nicoya Complex, the oldest geological formation in Lower Central America. Tikuna belongs to a lineage of South American Atalophlebiinae (Leptophlebiidae: Ephemeroptera) whose origin is hypothesized to have been in the late Cretaceous–early Tertiary. Some implications of the distribution of Tikuna for theories on the origin of Costa Rica’s biota are discussed.

Modelling agroforestry systems of cacao (Theobroma cacao) with laurel (Cordia alliodora) or poro (Erythrina poeppigiana) in Costa Rica

1990 ◽  
Vol 12 (3) ◽  
pp. 229-249 ◽  
Author(s):  
J. Beer ◽  
A. Bonnemann ◽  
W. Chavez ◽  
H. W. Fassbender ◽  
A. C. Imbach ◽  
...  
Keyword(s):  
Costa Rica ◽  
Theobroma Cacao ◽  
Agroforestry Systems ◽  
Cordia Alliodora ◽  
Erythrina Poeppigiana

Biologic and genetic characteristics of Toxoplasma gondii isolates in free-range chickens from Costa Rica, Central America

2006 ◽  
Vol 139 (1-3) ◽  
pp. 29-36 ◽  
Author(s):  
J.P. Dubey ◽  
C. Su ◽  
J. Oliveira ◽  
J.A. Morales ◽  
R.V. Bolaños ◽  
...  
Keyword(s):  
Costa Rica ◽  
Toxoplasma Gondii ◽  
Central America ◽  
Genetic Characteristics ◽  
Free Range ◽  
Toxoplasma Gondii Isolates

Xanthomonas gardneri. [Distribution map].

2016 ◽  
Author(s):  
Keyword(s):  
British Columbia ◽  
Costa Rica ◽  
North America ◽  
South America ◽  
Central America ◽  
Rio Grande ◽  
Rio Grande Do Sul ◽  
Distribution Map ◽  
New Distribution ◽  
Distribution In Europe

Abstract A new distribution map is provided for Xanthomonas gardneri (ex Sutic) Jones et al. Gammaproteobacteria: Xanthomonadales: Xanthomonadaceae. Hosts: tomato (Solanum lycopersicum) and pepper (Capsicum annuum). Information is given on the geographical distribution in Europe (Bulgaria and Russia), Asia (Malaysia), Africa (Ethiopia and Reunion), North America (Canada, British Columbia, Ontario, USA, Michigan, Ohio and Pennsylvania), Central America and Caribbean (Costa Rica) and South America (Brazil, Espirito Santo, Goias, Minas Gerais, Parana, Rio Grande do Sul and Santa Catarina).

Mycena citricolor. [Distribution map].

1975 ◽  
Author(s):  
Keyword(s):  
Puerto Rico ◽  
Costa Rica ◽  
North America ◽  
South America ◽  
Dominican Republic ◽  
Central America ◽  
West Indies ◽  
French Guiana ◽  
Distribution Map ◽  
New Distribution

Abstract A new distribution map is provided for Mycena citricolor (Berk. & Curt.) Sacc. Hosts: Coffee (Coffea spp.) and others. Information is given on the geographical distribution in NORTH AMERICA, Mexico, USA (Florida), CENTRAL AMERICA & WEST INDIES, Costa Rica, Cuba, Dominica, Dominican Republic, Guadeloupe, Guatemala, Haiti, Honduras, Jamaica, Martiniq, caragua, Panama, Puerto Rico, Salvador, Trinidad, SOUTH AMERICA, Brazil, Bolivia, Colombia, Ecuador, French, Guiana, Guyana, Peru, Surinam, Venezuela.

Deciphering the Chitin Code in Plant Symbiosis, Defense, and Microbial Networks

2021 ◽  
Vol 75 (1) ◽  
pp. 583-607
Author(s):  
Devanshi Khokhani ◽  
Cristobal Carrera Carriel ◽  
Shivangi Vayla ◽  
Thomas B. Irving ◽  
Christina Stonoha-Arther ◽  
...  
Keyword(s):  
Mycorrhizal Fungi ◽  
Growth And Development ◽  
Fungal Growth ◽  
Mycorrhizal Symbiosis ◽  
Signal Molecules ◽  
Symbiotic Relationship ◽  
Beneficial Microbes ◽  
Symbiotic Interactions ◽  
Microbe Interactions ◽  
Structural Polymer

Chitin is a structural polymer in many eukaryotes. Many organisms can degrade chitin to defend against chitinous pathogens or use chitin oligomers as food. Beneficial microorganisms like nitrogen-fixing symbiotic rhizobia and mycorrhizal fungi produce chitin-based signal molecules called lipo-chitooligosaccharides (LCOs) and short chitin oligomers to initiate a symbiotic relationship with their compatible hosts and exchange nutrients. A recent study revealed that a broad range of fungi produce LCOs and chitooligosaccharides (COs), suggesting that these signaling molecules are not limited to beneficial microbes. The fungal LCOs also affect fungal growth and development, indicating that the roles of LCOs beyond symbiosis and LCO production may predate mycorrhizal symbiosis. This review describes the diverse structures of chitin; their perception by eukaryotes and prokaryotes; and their roles in symbiotic interactions, defense, and microbe-microbe interactions. We also discuss potential strategies of fungi to synthesize LCOs and their roles in fungi with different lifestyles.

Typophorus nigritus. [Distribution map].

1991 ◽  
Author(s):  
Keyword(s):  
Costa Rica ◽  
South America ◽  
Central America ◽  
Sweet Potato ◽  
Geographical Distribution ◽  
French Guiana ◽  
Distribution Map ◽  
New Distribution

Abstract A new distribution map is provided for Typophorus nigritus (Fabricius) Coleoptera: Chrysomelidae, Eumolpinae. Attacks sweet-potato. Information is given on the geographical distribution in CENTRAL AMERICA and CARIBBEAN, Costa Rica, Cuba, Grenada, Grenadine Islands, Guatemala, Honduras, Mexico, Nicaragua, Panama, St. Vincent, Trinidad, SOUTH AMERICA, Argentina, Bolivia, Brazil, Colombia, Equador, French Guiana, Guyana, Paraguay, Peru, Uruguay, Venezuela.

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