517 research outputs found
Forner-Alcaide 5 and Forner-Alcaide 13: Two New Citrus Rootstocks Released in Spain
No full textThe search for new citrus rootstocks with better performance than those currently used is the major aim of the citrus industry in many countries. New diseases, the spread of known diseases, and citrus culture under different environmental conditions force the demand for new rootstocks. Carrizo citrange [Citrus sinensis (L.) Osb. x Poncirus trifoliata (L.) Raf.], the most used rootstock in Spain, frequently shows iron chlorosis and salinity problems. Other less common rootstocks, such as Cleopatra mandarin (C. reshniHort. ex Tan.), C. volkameriana Ten. & Pasq., Swingle citrumelo (C. paradisi Macf. x P. trifoliata), and C. macrophylla Wester, do not conveniently solve the problems. Forner-Alcaide 5 (F-A 5) and Forner-Alcaide 13 (F-A 13) are two interspecific hybrids obtained through traditional hybridization by the senior author in a program for breeding citrus rootstocks at the Instituto Valenciano de Investigaciones Agrarias (IVIA) in Moncada (Valencia), Spain. The goals of the breeding program were to obtain new rootstocks tolerant to CTV, salinity, and lime-induced chlorosis and resistant to Phytophthora sp. (Forner and Alcaide, 1993, 1994; Forner et al., 1997
Do you read English? El club de lectura en lengua inglesa de la biblioteca Juan Pablo Forner de Mérida
No full text[ES] Se explica aquí el funcionamiento del club de lectura en lengua inglesa que se lleva a cabo en la biblioteca pública municipal Juan Pablo Forner de Mérida. Se describen las similitudes y diferencias existentes entre un club de lectura español y en inglés así como los requisitos para poder participar, criterios de selección de obras que se van a leer y opiniones personales de los miembros del club
Una carta inédita de Juan Pablo Forner
No full textRisco Antonio. Una carta inédita de Juan Pablo Forner. In: Cahiers du monde hispanique et luso-brésilien, n°31, 1978. Numéro consacré en partie au XVIIIe siècle. pp. 91-112
Juan Pablo Forner in the “Dramatic poetry”: The lost works
No full textEn este artículo, se rescatan del olvido los fragmentos y noticias que se han conservado de las obras dramáticas perdidas de Juan Pablo Forner: La escena I del acto III de la tragedia Las Vestales y los datos sobre la composición y el argumento de La Cautiva Española. Se incluyen, en edición crítica con notas textuales, los dos textos que el propio emeritense consiguió preservar de estas dos creaciones suyas, el fragmento de Las Vestales incluido en las «Ilustraciones» al segundo de sus Discursos filosóficos sobre el hombre, y Carta de don Juan Pablo Forner [...] a Don Ignacio López de Ayala [...] sobre haberle desaprobado su drama intitulado La Cautiva española. Con este trabajo se ha querido contribuir a mejorar el conocimiento que hoy se tiene de la producción escrita legada por Forner a la posteridad, y a difundirla entre los lectores actuales interesados.This article rescues from oblivion the fragments and news that have been preserved from the lost dramatic works of Juan Pablo Forner: Scene I of Act III of the tragedy Las Vestales, and the data on the composition and plot of La Cautiva Española. Included, in a critical edition with textual notes, are the two texts that the native of Merida himself managed to preserve from these two of his creations, the fragment of Las Vestalesincluded in the «Ilustraciones» to the second of his Discursos filosóficos sobre el hombre, and his Carta de don Juan Pablo Forner[...] a Don Ignacio López de Ayala [...] sobre haberle desaprobado su drama intitulado La Cautiva española. With this work we wanted to contribute to improve the knowledge we have today of the written production bequeathed by Forner to posterity, and to disseminate it among today’s interested readers
Juan Pablo Forner, un «contra-optimista» de la Ilustración española
No full textLa vie et l’œuvre de Juan Pablo Forner (1756-1797) ont souvent été considérées comme représentatives de la tendance conservatrice et anti-philosophique des Lumières espagnoles. Pourtant, à la lumière des témoignages recueillis, l’écrivain de Mérida montre qu’il fut l’un des destinataires les plus passionnés du monde hispanophone des Essais de Théodicée sur la bonté de Dieu, la liberté de l’homme et l’origine du mal, publiés par le philosophe allemand Gottfried Wilhelm Leibniz en 1710, dont il souhaitait détromper les doctrines de ses contemporains.Cet article vise à démontrer la connaissance qu’avait Forner non seulement des fondements théoriques de l’optimisme leibnizien, mais aussi de ses principaux adeptes et détracteurs. La recherche comprend l’analyse de textes imprimés qui permettent de situer convenablement Forner dans le contexte européen de la « querelle de l’optimisme » au cours du XVIIIᵉ siècle
NUTRITIONAL RESPONSES OF CITRUS ROOTSTOCKS TO SALINITY: PERFORMANCE OF THE NEW HYBRIDS FORNER-ALCAIDE 5 AND FORNER-ALCAIDE 13
No full textThis study assesses the nutritional behavior of the new citrus rootstocks Forner-Alcaide no.5 (FA-5) and Forner-Alcaide no. 13 (FA-13) under saline conditions compared to that of their parents, Cleopatra mandarin (CM) and Poncirus trifoliata (PT). Eighteen month-old plants grafted with Valencia orange scions were used in the experiment. The plants were grown in a greenhouse and irrigated over an. eight-week period with nutrient solutions to which, different amounts of sodium chloride (NaCl) had been added, namely 0, 20, 40 and 60 mM. Relative growth and the uptake of major mineral elements [nitrogen (N), phosphorus (P), potassium (K), calcium (Ca), and magnesium (Mg,)] were then determined. It was noted that the reduction in relative growth caused by salt treatment was greater in plants grafted on PT than those on FA-13, FA-5 and CM. increasing the salt level in the growth medium reduced the absorption of the above mineral elements in all scion-rootstock combinations. However; this decrease was generally more marked in plants grafted on PT than in those on CM and FA-5. Plants on FA-13 showed an intermediate behavior Positive correlations were found between growth and mineral element uptake by salt treated plants. Nutrient uptake was also plotted against chloride (Cl) and sodium (Na) concentrations in leaves and roots at increasing salt levels. This showed that N absorption was closely correlated (inversely) with Cl content in leaves, whereas K, Ca and Mg uptakes were correlated (inversely) with Na concentration in roots. This suggests that the accumulation of saline ions impacts growth and nutrient uptake by citrus plants
Performance of Navel orange trees grafted onto two new dwarfing rootstocks (Forner-Alcaide 517 and Forner-Alcaide 418)
No full textThe aim of the present work was to study the performance of two new dwarfing citrus rootstocks (FornerAlcaide 517 and Forner-Alcaide 418) in comparison with Carrizo citrange. To carry out these experiments, rootstocks were budded with Navelina Navel orange scions. In young plants, rootstocks' size-controlling capacity was associated to their hydraulic conductance. In the case of Forner-Alcaide 418, lower hydraulic conductance was related to a smaller lumen area of root xylem vessels with respect to the other rootstocks. Also, hydraulic resistance of bud union segments of the stem was found to decrease with increasing vigour of plants grafted onto the different rootstocks. Furthermore, the graft union may provide resistance to sucrose transport in dwarfing rootstocks, as indicated by the reduced translocation of 13C-labelled photoassimilates from leaves to roots and reduced soluble sugar and starch concentrations under the graft union. This may result in a deficient carbohydrate supply to roots in dwarfing rootstocks, thereby stunting their growth. Accordingly, small root size and low hydraulic conductivity may cause water deficit in leaves during periods of high evaporative demand, inducing stomata! closure. This leads to a decrease in photosynthetic assimilation rate, which may affect plant growth negatively. These effects occur to a different extent in scions on both dwarfing rootstocks, appearing to be the cause of their reduced growth. Moreover, plants on both dwarfing rootstocks showed decreased translocation of 13 C-photoassimilates to roots, possibly contributing to higher availability of these compounds in the scion, and resulting in increased 13C transport towards the fruits. This effect could explain the higher yield efficiencies found in dwarfing rootstocks. A ten-year long field experiment, with trees grafted onto the three rootstocks, showed that FornerAlcaide 517 and Forner-Alcaide 418 induced lower canopy volumes and higher yield efficiencies than Carrizo citrange. In addition, our results show both dwarfing rootstocks produce good fruit quality, are suitable for high density plantings and can be cultured in alkaline soils. (C) 2014 Elsevier B.V. All rights reserved
- …
