Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99


Any time

2015 ( 4 )

2014 ( 3 )

2013 ( 11 )

2012 ( 8 )

Custom range...

Search Results: 1 - 10 of 80 matches for " GOTZ PALFNER "
All listed articles are free for downloading (OA Articles)
Page 1 /80
Display every page Item
Mycotrophy in Gilliesieae, a threatened and poorly known tribe of Alliaceae from central Chile Micotrofía en Gilliesieae, una tribu amenazada y poco conocida de Alliaceae de Chile central
Revista chilena de historia natural , 2012,
Abstract: The five known genera of Gilliesieae have their diversity center in the Mediterranean zone of central Chile, where many of their habitats are threatened by urban expansion, industrial and agroforestry activities, as well as other anthropogenic impacts. Very little is known about the biology of these particular geophytes, the majority of which currently have either vulnerable or endangered status, mainly due to their dispersed and small populations generally associated to remnants of native vegetation. As mycorrhizal associations are essential for soil resource acquisition and stress mitigation in most plants, our objective was to assess the hitherto unknown mycotrophic status of ten species of Gilliesieae from central Chile by qualitative and quantitative assessment of intraradical fungal structures. All sampled genera (Gethyum, Gilliesia, Miersia, Solaria, Speea) showed regular presence of arbuscular mycorrhiza, while other mycorrhizal or putatively mutualistic associations, like dark septate endophytes, were practically absent. Mycorrhizal colonization of fine roots reached a mean of ca. 45 % across all examined taxa, with highly variable values ranging from 9 % to 82 % in Miersia tenuiseta and Gilliesia curicana, respectively. The high level of mycorrhization indicates that arbuscular mycorrhiza should be considered for conservation strategies of threatened species or biotechnological use in plant propagation. The main future task is the identification of the associated fungal taxa. Los cinco géneros conocidos de Gilliesieae tienen su centro de diversidad en la zona mediterránea de Chile central, donde muchos de sus hábitats están amenazados por la expansión urbana, actividades industriales y agroforestales, así como otros impactos antropogénicos. Se sabe muy poco sobre la biología de estas particulares geófitas, que en la actualidad tienen en su mayoría estatus de vulnerable o en peligro de extinción, debido a sus poblaciones dispersas y pequenas, generalmente asociadas a remanentes de vegetación nativa. Dado que las asociaciones micorrícicas son esenciales para la adquisición de recursos del suelo y para la mitigación de estrés en la mayoría de las plantas, nuestro objetivo fue determinar el estatus micotrófico aún desconocido de diez especies de Gilliesieae de Chile central, mediante análisis cualitativos y cuantitativos de las estructuras fúngicas intrarradicales. Todos los géneros evaluados (Gethyum, Gilliesia, Miersia, Solaria, Speea) mostraron la presencia regular de micorrizas arbusculares, mientras que otras asociaciones micorrícicas o asoci
Primer registro de Russula pectinatoides Peck (Basidiomycota, Russulaceae) para Chile
Gayana. Botánica , 2011, DOI: 10.4067/S0717-66432011000200025
Abstract: russulapectinatoides (basidiomycota, russulaceae), considered a holarctic species, is reported for the first time from chile. it adds to the list of adventitious russula and lactarius species which form mycorrhizal associations with introduced ornamental and forest trees. a detailed description and an updated key for allochtonous agaricoid russulaceae in chile are provided.
Primer registro de Russula pectinatoides Peck (Basidiomycota, Russulaceae) para Chile First record of Russula pectinatoides Peck (Basidiomycota, Russulaceae) from Chile
Gayana. Botanica , 2011,
Abstract: Russulapectinatoides (Basidiomycota, Russulaceae), considered a holarctic species, is reported for the first time from Chile. It adds to the list of adventitious Russula and Lactarius species which form mycorrhizal associations with introduced ornamental and forest trees. A detailed description and an updated key for allochtonous agaricoid Russulaceae in Chile are provided.
Problems of Economic Development in Reunified Germany. Retrospective Approach
Marta Gotz
Contemporary Economics , 2010,
Abstract: Does Eastern Germany differ significantly from Western part in economic terms? How have new Bundesl nder been developing over past twenty years? How fast has East been catching up with West? What could have hampered convergence? How today are German states equipped with factors determining future growth? How the new Bundesl nder performed do compared with the old ones? This paper seeks to address above mentioned questions. It offers a comprehensive review of key economic developments of two decades of reunited Germany. Particularly it examines current economic landscape; investigates convergence processes taking place since reunification and tries to identify most likely impediments hampering full catching up. Finally, it aims at assessing contemporary growth potential of German states. With respect to the starting point – poor performance of East Germany back in 1990 the progress made and results achieved are impressive. Though, comparing the situation with Western part of the country – significant discrepancies continue to exist. Certainly, assessment of the last twenty years of reunited Germany hinges much upon perspective taken. Two decades after Berlin Wall Fall opinions on economic consequences of reunification are more balanced, since much has been achieved, but much still needs to be done”.
INTEGRAL Results on Gamma-Ray Bursts
Diego Gotz
Physics , 2013,
Abstract: Despite being a general observatory, and not a Gamma-Ray Bursts (GRBs) oriented mission, INTEGRAL has contributed to several important discoveries in the GRB field. This has been obtained thanks to its unprecedented localization capabilities, and sensitivity in the soft gamma-ray domain. In this paper I will review the main results obtained during the last 10 years with, and thanks to, INTEGRAL GRBs, including the discovery of one of the few GRBs spectroscopically associated with a Supernova, the first measurement of variable polarization in the GRB prompt emission, the indication of the existence of a low-luminosity population of GRBs, as well as the recent application of GRBs as probes for the fundamental physics. I will mention the main global characteristics of the INTEGRAL sample, and make the point on the lessons learnt from INTEGRAL in the perspective of designing future GRB dedicated missions.
Observation of Gamma-ray Bursts with INTEGRAL
D. Gotz,S. Mereghetti
Physics , 2002,
Abstract: We expect that at least one Gamma-Ray Burst per month will be detected in the field of view of INTEGRAL instruments and localized with an accuracy of a few arcminutes. IBIS (the Imager on board INTEGRAL) will be the most sensitive instrument in the soft $\gamma$-ray band during the next few years. This will allow INTEGRAL to detect the faintest (and hence the most distant) $\gamma$-ray bursts, thus surely contributing to the study of the physics of GRBs and to the comprehension of the early stages of the Universe. GRBs will be detected and localized in (near) real time with the IBAS (INTEGRAL Burst Alert System) software, and their coordinates will be immediately distributed to the scientific community, allowing for prompt follow-up observations at other wavelengths. The flexibility of the IBAS software, running on ground at the ISDC, will allow us to possibly reveal new classes of bursts, such as ultra-short bursts ($\sim$ ms) or very long (t $>$ 50 s) but slowly rising bursts, that could not be detected by previous experiments.
Path decompositions for Markov chains
Gotz Kersting,Kaya Memisoglu
Mathematics , 2004, DOI: 10.1214/009117904000000234
Abstract: We present two path decompositions of Markov chains (with general state space) by means of harmonic functions, which are dual to each other. They can be seen as a generalization of Williams' decomposition of a Brownian motion with drift. The results may be illustrated by a multitude of examples, but we confine ourselves to different types of random walks and the Polya urn.
Laetisaria fuciformis (Basidiomycota, Corticiaceae), nuevo registro de un parásito fúngico sobre gramíneas en el sur de Chile
Palfner,G?tz; Marticorena,Alicia; Medina,Marcelo;
Gayana. Botánica , 2010, DOI: 10.4067/S0717-66432010000200013
Abstract: a new record of the fungal grass parasite laetisaria fuciformis from southern chile is described and its biology is briefly discussed.
Controlled Rhizogenesis and Mycorrhization of Hazelnut (Corylus avellana L.) Cuttings with Black Truffle (Tuber melanosporum Vitt.)
Santelices,Rómulo; Palfner,G?tz;
Chilean journal of agricultural research , 2010, DOI: 10.4067/S0718-58392010000200003
Abstract: hazelnut (corylus avellana l.) is commonly used as mycorrhizal host for tuber melanosporum vitt. (black truffle). black truffle orchards have been established in and outside its natural distribution area, currently also in chile. hazelnut can be propagated rapidly by cuttings, which, however, may not easily form mycorrhizal symbiosis under laboratory conditions. we successfully inoculated hazelnut cuttings with t. melanosporum and studied the effects of culture conditions, plant material and inoculum age on rhizogenesis and mycorrhization. cuttings from sucker shoots showed the highest rooting rate (88.5%). perlite and vermiculite as substrate increased root length (9.6 cm ). treatment with auxin significantly increased root yield (up to 27 roots per cutting). larger containers increased the mycorrhization rate (33.6%). up to 2 year storage of sporal inoculum did not affect mycorrhization. we conclude that root induction in c. avellana cuttings and mycorrhization with black truffle using up to 2-yr-old inoculum, do not present problems when performed under optimized conditions, allowing fast production of plants for commercial and reforestation purposes.
Laetisaria fuciformis (Basidiomycota, Corticiaceae), nuevo registro de un parásito fúngico sobre gramíneas en el sur de Chile Laetisaria fuciformis (Basidiomycota, Corticiaceae), new record of a fungal grass parasite from southern Chile
G?tz Palfner,Alicia Marticorena,Marcelo Medina
Gayana. Botanica , 2010,
Abstract: A new record of the fungal grass parasite Laetisaria fuciformis from southern Chile is described and its biology is briefly discussed.
Page 1 /80
Display every page Item

Copyright © 2008-2017 Open Access Library. All rights reserved.