Revista de la Facultad de Agronomía, La Plata, May 30, 2017
Durante los anos 1987-1991 se realizaron estudios morfologicos, fenologicos, ontogeneticos y de b... more Durante los anos 1987-1991 se realizaron estudios morfologicos, fenologicos, ontogeneticos y de biologia reproductiva de tres cultivares de Corylus avellana, en explotacion, en la provincia de San Luis, Argentina. Los cultivares «Barcelona», «Pauetet» y «Cosford» fueron manifiestamente protandricos. «Cosford» presento el polen en coincidencia con la receptividad de los cultivares «Barcelona» y «Pauetet», y exhibio un buen nivel de compatibilidad con los mismos, comportandose como buen cultivar polinizador. En los tres cultivares el crecimiento ovarico se inicio en momentos diferentes, pero el tamano maximo se alcanzo en forma casi simultanea (enero). Pauetet» se distinguio por adquirir el volumen final del fruto en menor tiempo y sin un periodo inicial de crecimiento lento. «Barcelona» y «Pauetet» tuvieron caracteristicas de cultivares productores. «Barcelona» tuvo mayor porcentaje de fructificacion (ca. 18 %) y frutos mas pesados, pero «Pauetet» lo supero en productividad (3,5 vs. 2,9 kg/planta) debido a su mayor numero de flores por individuo. El rendimiento al descascarado efectivo fue de ca. 50 %. El contenido de aceite crudo de la semilla, en promedio, fue de ca. 61 % del peso seco, y la fraccion correspondiente al acido oleico represento ca. 76 % del total.
This is the first report of the ultrastructure of the stigma and style during and after anthesis ... more This is the first report of the ultrastructure of the stigma and style during and after anthesis in Helianthus annuus L. using light and transmission electron microscopy. The stigma is bifid with unicellular papillae. There is no secretion of lipids, carbohydrates or proteins at anthesis. The style is semisolid in the upper portion, closer to the stigma, and becomes solid below. Ultrastructural changes on cells of the stigma and the style are described. The transmitting tissue of the ovule is first evident 40 minutes after pollination and persists during the first stages of embryogenesis. Only one pollen tube per micropyle was observed growing through this tissue.
Agriculture, Ecosystems & Environment, Feb 1, 2016
Abstract Agricultural land management modify environments in such a way that ecosystem functions ... more Abstract Agricultural land management modify environments in such a way that ecosystem functions are impaired. The establishment of exotic plants, favoured by agricultural land management, may alter the foraging behaviour of native floral visitors and consequently the pollination service they provide. To determine whether agricultural land management affects the pollination service provided by floral visitors for the most abundant plant species in a Pampean grassland ecosystem, we compared the pollination service of native and exotic entomophilous plants in landscape fragments with or without current agricultural usage. Both the quantity (number of conspecific pollen grains deposited on stigmas) and quality (proportion of heterospecific pollen grains deposited on stigmas) of the pollination service was estimated for three to nine entomophilous plants in each landscape fragment. Agricultural land management reduced the quality of the pollination service due to an increase in the deposition of heterospecific pollen on stigmas.
Revista de la Facultad de Agronomía, La Plata, May 30, 2017
Durante los anos 1987-1991 se realizaron estudios morfologicos, fenologicos, ontogeneticos y de b... more Durante los anos 1987-1991 se realizaron estudios morfologicos, fenologicos, ontogeneticos y de biologia reproductiva de tres cultivares de Corylus avellana, en explotacion, en la provincia de San Luis, Argentina. Los cultivares «Barcelona», «Pauetet» y «Cosford» fueron manifiestamente protandricos. «Cosford» presento el polen en coincidencia con la receptividad de los cultivares «Barcelona» y «Pauetet», y exhibio un buen nivel de compatibilidad con los mismos, comportandose como buen cultivar polinizador. En los tres cultivares el crecimiento ovarico se inicio en momentos diferentes, pero el tamano maximo se alcanzo en forma casi simultanea (enero). Pauetet» se distinguio por adquirir el volumen final del fruto en menor tiempo y sin un periodo inicial de crecimiento lento. «Barcelona» y «Pauetet» tuvieron caracteristicas de cultivares productores. «Barcelona» tuvo mayor porcentaje de fructificacion (ca. 18 %) y frutos mas pesados, pero «Pauetet» lo supero en productividad (3,5 vs. 2,9 kg/planta) debido a su mayor numero de flores por individuo. El rendimiento al descascarado efectivo fue de ca. 50 %. El contenido de aceite crudo de la semilla, en promedio, fue de ca. 61 % del peso seco, y la fraccion correspondiente al acido oleico represento ca. 76 % del total.
This is the first report of the ultrastructure of the stigma and style during and after anthesis ... more This is the first report of the ultrastructure of the stigma and style during and after anthesis in Helianthus annuus L. using light and transmission electron microscopy. The stigma is bifid with unicellular papillae. There is no secretion of lipids, carbohydrates or proteins at anthesis. The style is semisolid in the upper portion, closer to the stigma, and becomes solid below. Ultrastructural changes on cells of the stigma and the style are described. The transmitting tissue of the ovule is first evident 40 minutes after pollination and persists during the first stages of embryogenesis. Only one pollen tube per micropyle was observed growing through this tissue.
Agriculture, Ecosystems & Environment, Feb 1, 2016
Abstract Agricultural land management modify environments in such a way that ecosystem functions ... more Abstract Agricultural land management modify environments in such a way that ecosystem functions are impaired. The establishment of exotic plants, favoured by agricultural land management, may alter the foraging behaviour of native floral visitors and consequently the pollination service they provide. To determine whether agricultural land management affects the pollination service provided by floral visitors for the most abundant plant species in a Pampean grassland ecosystem, we compared the pollination service of native and exotic entomophilous plants in landscape fragments with or without current agricultural usage. Both the quantity (number of conspecific pollen grains deposited on stigmas) and quality (proportion of heterospecific pollen grains deposited on stigmas) of the pollination service was estimated for three to nine entomophilous plants in each landscape fragment. Agricultural land management reduced the quality of the pollination service due to an increase in the deposition of heterospecific pollen on stigmas.
The Jesuit reductions of Paraguay and adjacent territories such as the Chiquitania in today’s Par... more The Jesuit reductions of Paraguay and adjacent territories such as the Chiquitania in today’s Paraguay, Brazil, Bolivia and Argentina (1608-1767) are a particular well-documented area of encounter between Jesuit missionaries and indigenous populations mainly Guaraní. There are medical texts mainly in Spanish from this area but also a pharmaceutical manuscript in Guaraní, ascribed to the Lay Brother Marcos Villodas (1695-1741) and dated 1725, not yet edited. When the most important Spanish text on the topic by the physician Pedro de Montenegro (1663-1728) was rediscovered in the 19th century, it was called "Materia Medica misionera" in its first edition. Different manuscript versions, some with illustrations exist. Also available is the recently rediscovered anonymous Spanish Tratado de ... cirurgia, dated 1725 and related to the missions, which represents one major source about history of medicine in the region. The articles in these proceedings focus on various aspects: medical terminology adopted by Jesuit manuscripts and dictionaries in Guarani and Chiquitano, Guaraní anthropological concepts about healing among the Jesuits, new discovered manuscripts of medicine history (a new version of a pharmaceutical manuscript ascribed to Villodas in Guaraní from the 18th century, the mentioned Spanish Tratado de cirurgia, dated 1725) and the history of research about the topic in 19th century Argentina by Pedro de Arata (1849-1922). With a short bibliography of contemporary manuscript sources and South American pharmaceutical inventories.
These congress proceedings (ICTAM Kiel 2017) show the importance of colonial Jesuit medicine for the history of science, antropology and linguistics in the region.
Articles:
Franz Obermeier
Introduction
Jesuit contributions to science and medicine in colonial South America, a research survey
Contributions
Sabine Lenke-von Heidenfeld
The encounter of Jesuit medicine and traditional Guaraní medicine in South America in the 17th and 18th century. Conflict, cooperation and the analysis of conceptual differences.
Franz Obermeier
Manuscritos descubiertos y redescubiertos de medicina y farmacia en el contexto guaraní-español de las reducciones rioplatenses en los siglos XVII y XVIII.
Sieglinde Falkinger
Maquimanaucotos - Medicine for the body - medicine for the soul
Leonardo Cerno
Variedad estándar y lengua común reduccional. Sobre el léxico del cuerpo humano y la medicina en la lexicografía jesuítica y en el manuscrito Pohã Ñanã (1725)
Diego Medan
Pedro N. Arata y la percepción inicial de los herbarios jesuíticos en el Río de la Plata
F. Obermeier
Bibliografia seleccionada de manuscritos de medicina del La Plata colonial/A selected bibliography of medical manuscripts from the colonial La Plata-region
F.Obermeier
Fuentes digitales para la historia de farmacias jesuíticas o coloniales en América del Sur/Digital sources for the history of Jesuit or colonial pharmacies in South America.
Uploads
These congress proceedings (ICTAM Kiel 2017) show the importance of colonial Jesuit medicine for the history of science, antropology and linguistics in the region.
Articles:
Franz Obermeier
Introduction
Jesuit contributions to science and medicine in colonial South America, a research survey
Contributions
Sabine Lenke-von Heidenfeld
The encounter of Jesuit medicine and traditional Guaraní medicine in South America in the 17th and 18th century. Conflict, cooperation and the analysis of conceptual differences.
Franz Obermeier
Manuscritos descubiertos y redescubiertos de medicina y farmacia en el contexto guaraní-español de las reducciones rioplatenses en los siglos XVII y XVIII.
Sieglinde Falkinger
Maquimanaucotos - Medicine for the body - medicine for the soul
Leonardo Cerno
Variedad estándar y lengua común reduccional. Sobre el léxico del cuerpo humano y la medicina en la lexicografía jesuítica y en el manuscrito Pohã Ñanã (1725)
Diego Medan
Pedro N. Arata y la percepción inicial de los herbarios jesuíticos en el Río de la Plata
F. Obermeier
Bibliografia seleccionada de manuscritos de medicina del La Plata colonial/A selected bibliography of medical manuscripts from the colonial La Plata-region
F.Obermeier
Fuentes digitales para la historia de farmacias jesuíticas o coloniales en América del Sur/Digital sources for the history of Jesuit or colonial pharmacies in South America.