Search results for "Charophyt"
showing 10 items of 30 documents
Aspects fonctionnels, structuraux et évolutifs de la réponse transcriptionnelle à l’auxine
2017
Auxin is a plant hormone implicated in almost all plant developmental stages, since the embryo formation till flowering, determining the position of the organs in the plant and thus, its whole structure. As for any other hormone, auxin perception is followed by a signal transduction that finishes in a series of changes in a plant cell, including transcriptional changes. This thesis is divided in 3 chapters, each with a focus on the structural, molecular and evolutionary aspects of different proteins involved in the regulation of auxin genes response.First, we focused our studies on TOPLESS (TPL), a co-repressor implicated, not only in auxin responsive genes repression, but also in many othe…
Dataset: Sexual reproductive phenology of three charophyte species from two Mediterranean brackish shallow ponds
2017
Esta base de datos contiene dos años de datos sobre la fenología reproductiva de tres especies de carófitos (Chara hispida, Chara aspera y Nitella hyalina) que crecen en distintas condiciones de profundidad y salinidad en dos charcas mediterráneas (someras y de agua salobre). La primera hoja de cálculo contiene todos los metadatos. De la segunda a la séptima hoja, se muestran los datos en bruto de cada población. De la octava a la decimotercera hoja, se muestran los datos agrupados y transformados de cada población. En la última hoja, se muestran las variables ambientales y fenológicas correspondientes a una población. Puede encontrarse más información sobre la adquisición, el análisis y la…
Macrophytes in Inland Waters: From Knowledge to Management
2023
The huge biodiversity of inland waters and the many different aquatic habitats or ecosystems occurring there are particularly threatened by human impacts. In this Special Issue, ten articles have been collected that show new data on the distribution and ecology of some rare aquatic macrophytes, including both vascular plants and charophytes, but also on the use of these organisms for the monitoring, management, and restoration of wetlands.
Time and heat for sexual reproduction: comparing the phenology of Chara hispida of two populations at different latitudes
2017
Abstract Geographical location affects the main ecological factors driving the timing of plants’ life events. In addition, studying phenology is the simplest procedure to track current global warming and its effects on the success and survival of different populations of the same species. Little is known about the effect of water temperature and its corresponding accumulated heat on charophytes’ phenology. We compared differences in water temperature and sexual reproductive phenology of Chara hispida in two ponds of two countries located at different latitudes (Spain and Switzerland) over the same year. We estimated the accumulated heat required to develop from one phenophase to another (un…
Observaciones sobre algunos caracteres de valor taxonómico en el grupo de los carófitos
1990
The variability of the microstructurals characters and mineralogical composition of the oogonia of some charophytes extant and fossils is described. Two types of microstructures (W & V) are find. These are conservative into populations and are not able to change by the environmental factors. Moreover, these structures are quite constant in some of the phylogenetics groups studied. Consequently it is proposed its utilization in taxonomy. The apparition of original compounds in the Charophyta (vaterite. whewelite, aragonite, etc.) is important because it supports an old idea that considerates the Charophyta as an autonomous class between the Clorophyta and the Traqueophyta.<br><b…
Macrophytes in Inland Waters - From Knowledge to Management
2023
Carbon biomass planktonic-periphytic organisms of a mesocosm experiment [Dataset]
2020
Este documento presenta los datos de biomasa en carbono (mgC m-2) de taxones planctónicos y perifíticos de un experimento a escala de mesocosmos. La comunidad planctónica-perifítica fue sometida a tres escenarios de cambio global, con la temperatura y la radiación ultravioleta como factores experimentales testados independientemente. Cada elemento de la comunidad fue identificado a la máxima resolución taxonómica posible. Las abreviaciones y explicaciones sobre los escenarios experimentales, las replicas de cada escenario y los detalles de los compartimentos considerados en cada mesocosmos se muestran en la primera página de este documento. This document presents the data about carbon bioma…
Wetland Restoration with Hydrophytes: A Review
2021
Restoration cases with hydrophytes (those which develop all their vital functions inside the water or very close to the water surface, e.g., flowering) are less abundant compared to those using emergent plants. Here, I synthesize the latest knowledge in wetland restoration based on revegetation with hydrophytes and stress common challenges and potential solutions. The review mainly focusses on natural wetlands but also includes information about naturalized constructed wetlands, which nowadays are being used not only to improve water quality but also to increase biodiversity. Available publications, peer-reviewed and any public domain, from the last 20 years, were reviewed. Several countrie…
Dataset: Growth, morphology and metabolic variables of charophytes (freshwater macroalgae) under different treatments of radiation, temperature and n…
2018
Esta base de datos contiene resultados de dos experimentos (RADxTEMP y RADxNIT) a escala de microcosmos referentes a variables de crecimiento, morfológicas, metabólicas y de composición estequiométrica de 2 especies de macroalgas de agua dulce, concretamente carófitos (Chara hispida y Chara vulgaris) procedentes de dos sistemas (el lago de Somolinos en Guadalajara y el Ullal de Quartons en Castellón), por tanto, 4 poblaciones (2 especies x 2 orígenes). En estos dos experimentos de diseño factorial, los individuos de las 4 poblaciones fueron sometidos a dos niveles de radiación, dos niveles de temperatura (RADxTEMP) y dos niveles de concentración de nitrato (RADxNIT). En esta matriz de datos…
Submerged macrophytes as key players in aquatic ecosystems under global change: a multiscale experimental approach
2020
El actual cambio global está causando alteraciones en los ecosistemas de todo el mundo a través de cambios interactivos en los principales factores ambientales (e.g. la temperatura, la concentración de nutrientes y la radiación ultravioleta). Los ecosistemas acuáticos continentales son altamente vulnerables ante estos cambios y, específicamente, en la región mediterránea, la situación es peor ya que la mayoría de estos sistemas son someros y están expuestos a las perturbaciones ambientales y antrópicas. Las praderas de macrófitos sumergidos y, particularmente, los carófitos, son un elemento conspicuo de estos sistemas con un papel fundamental en su funcionamiento. Estos organismos proveen d…