Organografia i malalties del cecidi de "Diastrophus rubi" (Bouché, 1834) Hartig, 1840 "(Hymenoptera: Cynipoidea: Cynipinae) a la tija de l'esbarzer, "Rubus caesius" L. "(Rosaceae)" Authors Juli Pujade i Villar Abstract Study of the gall of the bramble stem under the microscope has led us to arrive at the following conclusions: The epidermis, which in normal conditions is monostratal and cuticular, changes into the polystratal type and becomes suberose. An inversion is produced in the colenchyma and cortical parenchyma. The cortical parenchyma loses its chloroplasts and becomes thickly grouped into two to five layers of cells of the thin and prismatic type, changing into a smaller size and at the same time swelling. The parenchyma tissue located around the gall moves to the outside of the larvarian chambers surrounding the collecting veins. In this zone there are very many punctuations never seen in a healthy stem. The conducting veins lose the centripetal structure of dicotilodonous plants and take on an oval from where a large number of liberian veins surround little groups of woody veins. The sclerenchymatic tissue disappears almost completely, while a parenchymatic tissue appears in the inner part of the larvarian chamber (nutritious tissue) which is very thick. The markedly deformed medular parenchyma surrounds the whole of this structure. We have succeeded in finding for the first time in Europe a fungus belonging to the genus Phomopsis (Sphaeropsidea), a parasite of the bramble Rubus caesius L. (Rosaceae), and specifically of the gall of Diastrophus rubi (B.) (Cynipid). Downloads Download data is not yet available. Downloads Text complet (Català) Published 2005-04-29 Issue Vol. 54 : 1987 (Secció de Botànica, 6) Section Articles License The intellectual property of articles belongs to the respective authors.On submitting articles for publication to the journal Butlletí de la Institució Catalana d'Història Natural authors accept the following terms:Authors assign to Institució de la Societat Catalana d’Història Natural (a subsidiary of Institut d’Estudis Catalans) the rights of reproduction, communication to the public and distribution of the articles submitted for publication to Butlletí de la Institució Catalana d'Història Natural.Authors answer to Institució de la Societat Catalana d’Història Natural for the authorship and originality of submitted articles.Authors are responsible for obtaining permission for the reproduction of all graphic material included in articles.Institució de la Societat Catalana d’Història Natural declines all liability for the possible infringement of intellectual property rights by authors.The contents published in the journal, unless otherwise stated in the text or in the graphic material, are subject to a Creative Commons Attribution-NonCommercial-NoDerivs (by-nc-nd) 3.0 Spain licence, the complete text of which may be found at https://creativecommons.org/licenses/by-nc-nd/3.0/es/deed.en. Consequently, the general public is authorised to reproduce, distribute and communicate the work, provided that its authorship and the body publishing it are acknowledged, and that no commercial use and no derivative works are made of it.The journal Butlletí de la Institució Catalana d'Història Natural is not responsible for the ideas and opinions expressed by the authors of the published articles.