10,114 research outputs found
Marcescent corollas as functional structures: effects on the fecundity of two insect-pollinated plants
†Background and aims Persistence of withered corollas after anthesis (‘corolla marcescence’) is widespread in angiosperms, yet its functional significance does not seem to have been explored for any species. This note reports the results of experiments assessing the fecundity effects of marcescent corollas in two southern Spanish insect-pollinated plants, Lavandula latifolia (Lamiaceae) and Viola cazorlensis (Violaceae).
†Methods The effect of marcescent corollas on seed production was evaluated experimentally on wild-growing plants. Newly open flowers were randomly assigned to either control or treatment groups in experimental plants. After anthesis, withered corollas of treatment flowers were removed and those in control flowers were left in place. Fruits produced by treatment and control flowers were collected shortly before dehiscence and the number of seeds counted.
†Key Results In V. cazorlensis, removal of withered corollas had no effect on percentage of fruit set, but mean seeds per fruit increased from 9.5 to 11.4. In L. latifolia, corolla removal had no effect on the number of seeds per fruit, but reduced the proportion of flowers ripening fruit from 60 % to 40 %. The detrimental effect of corolla
removal on L. latifolia fecundity resulted from the drastic increase in fruit infestation by seed-predatory cecido- myiid larvae, which occurred in 4 % and 34 % of control and treatment fruits, respectively.
†Conclusions Because of their potential effects on plant fecundity, marcescent corollas should not be dismissed
a priori as biologically irrelevant leftovers from past floral functions. The simplicity of the experimental layout required to test for short-term fecundity effects of corolla marcescence should help to achieve a better understand-
ing of the ecological and evolutionary correlates of this widespread but poorly understood trait.Peer reviewe
AndalucÃa la nueva : la herencia urbanÃstica de la ciudad zonificada
Contemplamos el origen de la Urbanización Nueva AndalucÃa analizando la versión
primera del Plan de Ordenación de los terrenos y su posterior modificación con la segunda y
definitiva configuración en Supermanzanas. Asimismo, se estudian los tres primeros Planes
Parciales correspondientes a las Supermanzanas A, B y C, los cuales pretenden ser el fuerte
impulso de salida de la Ciudad Parque de Turismo AndalucÃa la Nueva. Todo lo expuesto nos
permite ver el grado de ejecución de cada zona y extraer unas conclusiones sobre las intenciones
de partida del empresario José Banús y como se desarrollan en el tiempo.The origin of the Urbanization Nueva AndalucÃa is watched by analyzing the first
version of the Land Use Planning and its subsequent modification with the second and final
Supermanzanas configuration. It also studies the first three Partial Plans for Supermanzanas
A, B and C, which claim to be the strong starting point to the City Park for Tourism AndalucÃa
la Nueva. All the described above allows us to define the degree of implementation in every
area and draw conclusions about the businessman José Banús´s initial intentions and how these
develop over time
LA HERENCIA WEBERIANA EN LA REPUBLICA DE WEIMAR
This article deals with Max Weber’s relationship with German politics. According to Carlos M. Herrera, the reception of Weberian political ideas in Weimar was the object of an open politico-intellectual battle –mainly in the field of state theory. The ambivalence in Weber’s theory is highlighted when it is established that his thinking was used by the various and opposing actors that, from Hans Kelsen and Richard Thoma to Carl Schmitt, were protagonists of the politico-intellectual debate about liberal democracy, the social rule of law and dictatorship.Este artÃculo trata sobre la relación de Max Weber con la polÃtica alemana. Según Carlos M. Herrrera, la recepción de las ideas polÃticas weberianas en Weimar fue objeto de una abierta batalla polÃtico-intelectual, fundamentalmente en el terreno de la teorÃa del Estado. La ambivalencia de la teorÃa de Weber se pone de relieve cuando se comprueba que su pensamiento fue usado por los diferentes y opuestos actores que, desde Hans Kelsen y Richard Thoma hasta Carl Schmitt, protagonizaron el debate polÃtico-intelectual acerca de la democracia liberal, el Estado social de derecho y la dictadura
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