Marimurtra

Información para el Visitante

October 9, 2016

Información para el Visitante

Two new Androcymbia (Colchicaceae) from Western South Africa
J. PEDROLA-MONFORT, N. MEMBRIVES FERNÀNDEZ, & J. M. MONTSERRAT MARTÍ Fontgueria 54(2): 7-9. (1999). Abstract. Two new taxa are described from the Cape region (Western South Africa): Androcymbium walteri and A. albanense Schönland subsp. clanwilliamense (Colchicacece). Resumen. Se describen dos nuevos táxones de la región Capense (Sudáfrica occidental): Androcymbium walteri y A. albanense Schönland subsp. clanwilliamense (Colchicacece). Résumé. Deux nouvelles taxa de I’Afrique sudoccidental sont décrites: Androcymbium walteri et A. albanense Schönland subsp. clanwilliamense (Colchicacecp). A NEW SPECIES FROM THE WESTERN OF SOUTH AFRICA: Androcymbium huntleyi (Colchicacece) Abstract. A new species is described from the Cape region (Westem South Africa): Androcymbium.

huntleyi Pedrola & al. (ColchicaceaeJ. Resumen. Se describe una especie nueva de la región Capense (Sudáfrica occidental): Androcymbium huntleyi Pedrola & al. (ColchicaceaeJ. Résumé. Une nouvelle espèce de I’Afrique sudoccidental est décrite: Androcymbium huntleyi Pedrola & al. (Colchicaceae) Control of PAR-saturated C02 exchange rate in some C3 and CAM plants S.L. NIELSEN, S. ENRÍQUEZ and C.M. DUARTE BIOLOGIA PLANTARUM 40 (I): 91-101, 1997/98 Abstract We measured PAR-saturated CO2 exchange rate (CER), and leaf N, P and chlorophyll (Chl) concentrations in 21 plant species, selected to encompass as broad a range in specific leaf area (SLA) as possible, and encompassing non-succulent C3 as well as succulent CAM plants. We worked with plants growing under uniform conditions in the facilities of a biological research station to ensure that any correlations found were due to inherent, genetically controlled, relationships between the measured parameters and not due to variations in resource availability in different habitats. We found CER to be strongly correlated to SLA, leaf N concentration and Chl.

cóncentration. CER increased much faster with increasing leaf N concentration (CER ≈ N3.1) than with increasing SLA (CER ≈ SLA1.2). CER also increased much faster with leaf N concentration than with increasing Chl concentration (CER ≈ Chl1.3), indicating the photosynthetic N-use efficiency (NUE) to be higher for plants with high N concentration than for plants with low N concentration (NUE ≈ N2.1). Analysis of covariance showed that these relationships exist even when comparing plants of widely different growth forms – succulent or non-succulent, and of different photosynthetic pathways, as the C3 and CAM plants compared here. Testing against scaling coefficients calculated using dimensional analysis, showed that the scaling of N, Chl and CER against SLA was not merely a result of diluting N and Chl with carbon in thicker leaves but that SLA, probably through influencing light aborption and/or CO2 difusion pathway, plaed an independent role in controlling CER.

THE ANDROCYMBIUM SPECIES OF THE CANARY ISLANDS Pedrola-Monfort, J. & J. Caujapé-Castells Curti’s Botanical Magazine 15(1): 67-77 Summary. The history, taxonomy, biology and cultivation ofthe Canary Islands endemics Androcymbium hierrense A. Santos and Androcymbium psammophilum Svent. (Colchicaceae) are discussed, together with hypotheses about their mainland origin; full botanical descriptions and
illustrations are provided.

CASTELLS & JOAN PEDROLA

October 9, 2016

CASTELLS & JOAN PEDROLA

GENETIC STRUCTURE AND SPATIAL DISTRIBUTION OF A NARROW
ENDEMIC PLANT: ANDROCYMBlUM EUROPAEUM (LANGE) K. RICHTER
(COLCHICACEAE) SUMMARY Allozyme differentiation at 10 loci was used to ascertain, by means of the application of the conventional mathematical methods to assess gene frequency data, the manner in which the genetic variability of A. europaeum is structured in all its known populations. In spite of its conditions of narrow, threatened and endangered endemic plant, it shows no sign of genetic depauperation, having been clearly able to maintain very high levels of variation. A conception to determine allelic rarity was used in an attempt to establish relations of ancestrality between the populations. These relations were further substantiated by the data concerning the paleontologlcal history of the distribution area. Genetic and morphological divergence in the Androcymbium gramineum complex (Colchicaceae)
JOAN PEDROLA-MONFORT and JULI CAUJAPÉ-CASTELLS Abstract: Narrow endemism is a poor predict
or of genetic potential in the six taxa that conform the Androcymbium gramineum complex, as shown by the unexpectedly high values of variability associated with ten allozymic loci and 13 biometrical variables. Although both levels are shown not to be correlated, variability is always concentrated within populations. This result, together with environmental, reproductive and historical data strongly suggests differentiation in local isolates, where changes can be quickly assimilated by stochastic processes. A key implication for conservation is that sampling within the largest population will save effort while neglecting only very low frequency alleles. Morfología y anatomía foliar del complejo Androcymbium gramineum (sect. Erythrostictus Benth., Colchicaceae) MATEU-ANDRÉS, I., J. PEDROLA & J. GÜEMES Candollea 51: 203-214. (1996)
Resumen Se estudian y describen las características morfológicas y anatómicas de los ferófilos de las especies que forman el complejo Androcymbium gramineum de la sección Erythrostictus Benth. (A. gramineum, A. europaeum, A. palaestinum, A. rechingeri, A. wyssianum, A. hierrense, A. psammophilum). Son plantas con cormo tunicado, expansiones foliares que se destacan del tallo a diferentes alturas y dan lugar a nomófilos e hipsófilos con flores dispuestas sobre la parte media
de la lámina. El número de ferófilos, así como su tamaño y coloración resultan buenos caracteres diferenciales. Referente a la anatomía, los ferófilos presentan epidermis anfistomáticas, de células

prismáticas, y mesófilo formado por 6-9 capas de células, con idioblastos secretores de mucopolisacáridos azufrados. Abstract Morphological and anatomical characters of leaf structures of the species included in the
Androcymbium gramineum complex of section Erythrostictus Benth. are studied and described (A. gramineum, A. europaeum, A. palaestinum, A. rechingeri, A. wyssianum, A. hierrense, A. psammophilum). These plants have a tunicated corm, with leaves expansions detached from the stem at different sites, giving rise to nomophylls and hypsophylls with flowers on the central area of the lamina. Ferophylls number size and colour arc good diagnostic features. In reference to anatomy, ferophylls have an epidermis of prismatic cells, stomata on both the upper and the lower surface of the blade, Space-time patterns of genetic structure within a stand of Androcymbium gramineum (Cav.) McBride (Colchicaceae) JULI CAUJAPÉ-CASTELLS & JOAN PEDROLA-MONFORT Heredity 79: 341-349 (1997)

Space-time patterns of genetic structure in the largest known Spanish stand of Androcymbium gramineum were explored through spatial autocorrelation on allele frequencies at 17 allozymic loci. Our results strongly suggest that the consistent overall profiles of short-distance genetic structure detected have evolved in a scenario of prolonged habitat uniformity by the action of prolific vegetative reproduction overlaid with a minor incidence of outcrossing and self-fertilization. Investigation of the temporal component of spatial genetic structure through the assessment of differently aged cohorts of plants provided evidence that patch sizes in this stand are progressively enlarged in the absence of microhabitat differentiation. These results explain the maintenance of large amounts of variability in this endangered endemic species.

Estación de Investigación Científica Marimurtra

October 9, 2016

Estación de Investigación Científica Marimurtra

El Jardí Botànic Marimurtra ha celebrat, per primera vegada, aquest any 2005 la Setmana de la Ciència. En aquest espai mostrem fotografies de les diferents activitats que hem organitzat i que hem compartit tant amb grups escolars com amb el públic en general. Les fotografies dels escolars corresponen als tallers “Identifiquem les plantes dels rodals” realitzats a la Casa Saladrigas amb alumnes de primer curs del primer cicle d’Ensenyament Secundari Obligatori de l’IES Serrallarga i del col·legi Cor de Maria de Blanes. Les fotografies de la sala de plens de l’Ajuntament corresponen a la conferència “El Jardí a l’abast” que va tenir lloc el dia 11. La resta són de les diferents visites guiades pel Jardí Botànic i per la casa del fundador del Marimurtra el Sr. Carl Faust durant la jornada de portes obertes el dijous dia 10 de novembre.

Que sean utilizados para el bien público en investigación, ensayos, propagación, educación o en desarrollo de las colecciones de los jardines botánicos. Si el corresponsal tratara de comercializar el material genético transferido, sus productos, o la investigación derivada del uso del mismo, deberá pedir permiso por escrito al Jardín Botánico que ha facilitado éste material. Esta comercialización podrá ser formalizada previo consentimiento y de acuerdo a los criterios del Jardín Botánico, consistentes en ceder una parte de los beneficios netos al país en el que fueron colectadas las semillas. Que no sea transferido el material genético, sus productos o la investigación derivada de éstos a una tercera parte para su comercialización, sin el permiso previo y por escrito del Jardín Botánico.
En cualquier publicación resultante del uso de los materiales transferidos deberá reconocerse su procedencia con mención explícita del Jardín Botánico. En caso de incumplimiento de alguna de estas condiciones de este convenio, a las cuales se sujeta una vez firmado, el Jardín Botánico o Institución podrá interponer demanda en el juzgado correspondiente. Pollen morphology and biometry in Androcymbium (Colchicaceae) Joan Martin, Joan Pedrola and Juli Caujapé The pollen of 34 individuals representing the 10 species and subspecies of the section Erythrostictus (Schlecht.) Bentham and 3 species of the section Cymbanthes Bentham in the genus Androcymbium Willdenow was examined with scanning electron microscopy to investigate the degree of morphologic differentiation within and between these two sections of the genus. Diporate pollen morphology was observed for all these taxa except for Androcymbium capense (L.) Krause (section Cymbanthes), which was triporate. Given the specific importance traditionally given to this character, some doubt is cast upon the naturalness of this section. Surface sculpturing was reticulate in both sections for all of the analysed species except for Androcymbium psammophilum Sventenius (section Erythrostictus), which was rugulateperforated. A canonical analysis of populations based upon four pollen biometric parameters measured on the analysed individuals belonging to section Erythrostictus was run. The pattern of groups displayed by the corresponding canonical representation furnishes other evidence that supports the establishment of more accurate taxonomic relationships among the species that are presently included in the complex Androcymbium gramineum (Cav.) McBride.

ALLOZYMIC AND MORPHOLOGICAL RELATIONS AMONG ANDROCYMBIUM GRAMINEUM, A. EUROPAEUM AND A. PSAMMOPHILUM (COLCHICACEAE) Abstract: Levels of allozymic and morphological diversity among Androcymbium gramineum, A. europaeum, and A. psammophilum have been assessed using data on 17 allozyme loci
and 18 morphological characters. No apparent pattern of geographic or ecological variation was found. Our results also suggest that A. gramineum and A. europaeum should be considered members of a single species and that the insular species A. psammophilum can no longer be thought of as the result of a founder effect from A. gramineum. Intrapopulational
variability was greater than inter-populational variability at both levels studied, which is of strategic interest for the “ex-situ” conservation of these threatened endemic species.