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  1. Article ; Online: Optimization of Plant Production by Seed Treatment in Two Wild Subspecies of Narcissus pseudonarcissus Rich in Alkaloids

    Raquel Herranz / Miguel A. Copete / José M. Herranz / Elena Copete / Pablo Ferrandis

    Molecules, Vol 25, Iss 4439, p

    2020  Volume 4439

    Abstract: The daffodil Narcissus pseudonarcissus L. contains alkaloids of pharmaceutical interest. Wild daffodil populations have diverse genetic backgrounds and various genetic traits of possible importance. Developing protocols for plant production from seeds ... ...

    Abstract The daffodil Narcissus pseudonarcissus L. contains alkaloids of pharmaceutical interest. Wild daffodil populations have diverse genetic backgrounds and various genetic traits of possible importance. Developing protocols for plant production from seeds may ensure the availability of a large reservoir of individuals as well as being important for species with bulbs that are difficult to acquire. The closely related Narcissus pseudonarcissus subsp. munozii-garmendiae and subsp. nevadensis were investigated in this study because the alkaloids isolated from both are of high pharmacological interest. At the dispersal time, the seeds of both were dormant with underdeveloped embryos, i.e., morphophysiological dormancy (MPD). Experiments were conducted outdoors and under controlled laboratory conditions. Embryo growth and the percentages of radicle and seedling emergence were calculated under different temperature–light stratifications. In N. munozii-garmendiae , embryo growth occurred during warm stratification (28/14 °C or 25/10 °C) and the radicle then emerged when the temperature decreased, but the shoot was dormant. In N. nevadensis , the seeds germinated when cold stratified (5 °C) and then incubated at cool temperatures. Thus, N. munozii-garmendiae and N. nevadensis exhibit different levels of MPD, i.e., deep simple epicotyl and intermediate complex, respectively. Plant production protocols from seeds were established for both taxa in this study.
    Keywords alkaloid ; Amaryllidaceae ; deep simple epicotyl morphophysiological dormancy ; dormancy breakage ; embryo growth ; germination ; Organic chemistry ; QD241-441
    Subject code 580
    Language English
    Publishing date 2020-09-01T00:00:00Z
    Publisher MDPI AG
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  2. Article ; Online: Análisis comparativo del área y morfología foliar en taxones ibéricos amenazados del género Coincya (Cruciferae) Comparative analysis of leaf area and morphology in threatened Iberian Coincya (Cruciferae) taxa

    MIGUEL A COPETE / JOSÉ M HERRANZ / PABLO FERRANDIS

    Revista Chilena de Historia Natural, Vol 83, Iss 3, Pp 365-

    2010  Volume 374

    Abstract: Se evalúa la variación del parámetro área foliar y un índice de morfología foliar (índice de forma) en plantas de 1, 2 y 3 meses de edad pertenecientes a cuatro taxones del género Coincya (Cruciferae) relacionados filogenéticamente. Para todas las edades ...

    Abstract Se evalúa la variación del parámetro área foliar y un índice de morfología foliar (índice de forma) en plantas de 1, 2 y 3 meses de edad pertenecientes a cuatro taxones del género Coincya (Cruciferae) relacionados filogenéticamente. Para todas las edades el área foliar alcanzó sus valores más altos en las formas que tienen frutos con rostros gruesos (C. rupestris), aumentando progresivamente según el siguiente orden: C. monensis subsp. orophila, C. longirostra, C. rupestris subsp. leptocarpa y C. rupestris subsp. rupestris. Se plantea que el aumento del área foliar en los taxones cuyos frutos poseen rostros gruesos puede constituir otra ventaja adaptativa adicional a las ya mencionadas para estos en trabajos anteriores a la vez que refuerza el esquema evolutivo propuesto para la totalidad del grupo. En cuanto a la morfología foliar, el índice de forma discrimina nítidamente los taxones extremos de esta línea filogenética: C. rupestris subsp. rupestris (más evolucionado) y C monensis subsp. orophila (más arcaico) una vez alcanzada la fase adulta; las formas intermedias, representadas por C. rupestris subsp. leptocarpa y C. longirostra, quedan encuadradas en un mismo grupo casi en su totalidad. Variation in leaf area and in a leaf morphological index (shape index) was evaluated in seedlings 1, 2, and 3-month aged in four taxa of Coincya genus (Cruciferae) phylogenetically related. For all ages, leaf area reached higher values in types having thick-beak fruits (C. rupestris), and gradually increased according to the following order: C. monensis subsp. orophila, C. longirostra, C. rupestris subsp. leptocarpa, and C. rupestris subsp. rupestris. We suggest that the increase of leaf area in thick-beak taxa may be an adaptive advantage, additional to those already suggested in previous studies, reinforcing as well the evolutive schema proposed for the entire group. With regard to leaf morphology, shape index neatly discriminated extreme taxa in the phylogenetical line (i.e., C. rupestris subsp. rupestris in the most ...
    Keywords área foliar ; morfología foliar ; rostro engrosado ; ventaja adaptativa ; adaptive advantage ; leaf area ; leaf morphology ; thick fruit-beak ; Zoology ; QL1-991 ; Botany ; QK1-989
    Language English
    Publishing date 2010-01-01T00:00:00Z
    Publisher BMC
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  3. Article ; Online: Reproductive biology of the critically endangered endemic Mediterranean plant Coincya rupestris subsp. rupestris (Spain)

    MIGUEL A COPETE / JOSÉ M HERRANZ / PABLO FERRANDIS

    Revista Chilena de Historia Natural, Vol 81, Iss 3, Pp 345-

    the effects of competition and summer drought on seedling establishment Biología reproductiva de la planta endémica mediterránea amenazada Coincya rupestris subsp. rupestris (España): efectos de la competencia y sequía estival en el establecimiento de plántulas

    2008  Volume 359

    Abstract: Flower, fruit, seed production, and flowering phenology (duration, intensity, moment and synchrony) were studied in the two main populations (south east Spain) of the critically endangered endemic Mediterranean plant Coincya rupestris subsp. rupestris ( ... ...

    Abstract Flower, fruit, seed production, and flowering phenology (duration, intensity, moment and synchrony) were studied in the two main populations (south east Spain) of the critically endangered endemic Mediterranean plant Coincya rupestris subsp. rupestris (Cruciferae). Production of flowers and fruits (mean ± SD) ranged from 483 (± 688) to 748 (± 636), and from 317 (± 518) to 553 (± 500), respectively, between populations. In addition, the average seed production per plant was 1,607-2,798, thus concluding that fertility was not responsible for the rarity of this taxon. The fruit/flower ratio ranged from 0.60 to 0.75, showing significant inter-population differences. Flowering extended from February-March to the end of spring, with high synchrony (= 85 %). This parameter was negatively correlated with duration of the flowering period. The role of pollinator insects on reproductive success, and the effect of watering treatments and the elimination of competitors on seedling recruitment were analysed in the classical locality. The exclusion of pollinators dramatically affected fructification, reducing reproductive success from moderate values in plants exposed to insects (= 0.5) to null values in those where insects were experimentally excluded. Seedling emergence was autumnal and no influence of the factors analysed (i.e., water availability and inter-specific competition) was detected on seedling establishment. A high interannual variability in the size and survival of cohorts originated each autumn was observed. It should be emphasized that the rarity of the taxon is not due to fecundity restrictions. Para el endemismo amenazado mediterráneo Coincya rupestris subsp. rupestris (Cruciferae) se analizaron diferentes aspectos de su biología reproductiva como la producción de flores, frutos y semillas, y la fenología de la floración a través de las variables representativas de la misma (duración, intensidad, momento y sincronía), de forma independiente en las dos poblaciones principales del taxon (sureste de España). La ...
    Keywords endemismo ibérico ; fenología de la floración ; éxito reproductivo ; reclutamiento de plántulas ; Iberian endemism ; flowering phenology ; reproductive success ; seedling recruitment ; Zoology ; QL1-991 ; Botany ; QK1-989
    Language English
    Publishing date 2008-09-01T00:00:00Z
    Publisher BMC
    Document type Article ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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    Inter-library loan at ZB MED

    Your chosen title can be delivered directly to ZB MED Cologne location if you are registered as a user at ZB MED Cologne.

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