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19 results for “Alismataceae”
Fig. 2 in (Alismataceae) de Guadeloupe (Petites Antilles). Observations palynologiques, cytogénétiques et chimiques
Fig. 2. — Echinodorus zombiensis Jérémie: A, récolte de spécimens submergés en bordure du lac; B, individus submergés stériles; C, D, inflorescences et fleurs, individus ayant fleuri dans les serres du Muséum à Paris; E, individus émergés stériles.
Fig. 1 in (Alismataceae) de Guadeloupe (Petites Antilles). Observations palynologiques, cytogénétiques et chimiques
Fig. 1. — Echinodorus zombiensis Jérémie: A, individus submergés stériles; B, individu florifère; C, trois types de feuilles, émergées (à gauche), submergée à droite; D, grossissement d'une feuille submergée montrant la nervation et les marques pellucides; E, détail de la marge d'une feuille d'un individu cultivé en aquarium; F, inflorescence; G, fleur; H, étamines; I, carpelles; J, fruit. (A, Jérémie 1971; B, F-I, Jérémie 2041; C, Jérémie 1987; E, Jérémie 2101; J, Jérémie 1989).
Fig. 5 in (Alismataceae) de Guadeloupe (Petites Antilles). Observations palynologiques, cytogénétiques et chimiques
Fig. 5. — Echinodorus zombiensis: A, plaque métaphasique (2n=36); B, plaque métaphasique et idiogramme (2n=26). Échelle en µm et intervalles de confiance calculés pour t0,05.
Fig. 4 in (Alismataceae) de Guadeloupe (Petites Antilles). Observations palynologiques, cytogénétiques et chimiques
Fig. 4. — Echinodorus tenellus (2n=22): plaque métaphasique et idiogramme (échelle en µm et intervalles de confiance calculés pour t0,05).
Fig. 3. — Pollen d in (Alismataceae) de Guadeloupe (Petites Antilles). Observations palynologiques, cytogénétiques et chimiques
Fig. 3. — Pollen d'Echinodorus. A-E: E. tenellus: A, variabilité dimensionnelle du pollen; B, un grain périporé; C, ectoaperture, membrane aperturale échinulée; D, endoaperture; E, infratectum columellaire. (A, Gardner 2730, P; B-E, Pedersen 3080, P). F-O: E. zombiensis: F, G, dyades; H, pôle proximal: perforation dans l'exine permettant la fusion des cytoplasmes des deux monades; I, J, exine de dyades couverte de longs bâtonnets; K, gros pollen simple correspondant à un dysfonctionnement de la division cellulaire; L, infratectum granulo-columellaire; M, grain simple fertile; N, grains restés groupés en tétrade plane; O, infratectum columellaire d'un grain fertile. (F-O, Jérémie 2041, P). Échelles: C-E, I, J, L, O = 1 µm; A, B, F-H, K, M, N = 10 µm.
Fig. 7 in (Alismataceae) de Guadeloupe (Petites Antilles). Observations palynologiques, cytogénétiques et chimiques
Fig. 7. — Formule chimique du β-D-glucoside de β-sitostérol.
Fig. 6. — Chromatogramme des extraits d in (Alismataceae) de Guadeloupe (Petites Antilles). Observations palynologiques, cytogénétiques et chimiques
Fig. 6. — Chromatogramme des extraits d'Echinodorus tenellus (1 et 3) et d'E. zombiensis (2 et 4).
Increased spatial-genetic structure in a population of the clonal aquatic plant Sagittaria latifolia (Alismataceae) following disturbance
<p>The spatial genetic structure (SGS) of plant populations is determined by the outcome of key ecological processes, including pollen and seed dispersal, the intensity of local resource competition among newly recruited plants, and patterns of mortality among established plants. Changes in the magnitude of SGS over time can provide insights into the operation of these processes. We measured SGS in a population of the clonal aquatic plant, <i>Sagittaria latifolia</i> that had been disturbed by flooding, both before and after the flood. . Over the four-year interval between measurements, we found substantial changes in the magnitude of SGS. In the first measurement (pre-flood), SGS was weak, even over short distances. By contrast, there was substantial SGS in the second measurement (post-flood), particularly over short distances. This change in SGS was accompanied by near complete turnover in the genotypic composition of the population. The genotypic richness of the population (the number of unique clones scaled by the sample size) was halved over the four-year interval. The clonal subrange – the distances between shoots within clones – also shrank considerably, with more than 5% of shoots having clone-mates at distances greater than 10 m before the flood, but fewer than 5% of shoots having clone-mates at distances beyond 2 m afterwards. Clonal turnover and the re-establishment of SGS in clonal populations are both expected following local extirpation and recruitment. These data reveal the genetic signatures of disturbance and a subsequent flush of seedling recruitment and subsequent clonal expansion.</p>
Echinodorus cordifolius (Alismataceae) - inflorescence - closeup of flower interior
Image of Echinodorus cordifolius (Alismataceae) - inflorescence - closeup of flower interior
Echinodorus cordifolius (Alismataceae) - leaf - unspecified
Image of Echinodorus cordifolius (Alismataceae) - leaf - unspecified
Echinodorus cordifolius (Alismataceae) - leaf - unspecified
Image of Echinodorus cordifolius (Alismataceae) - leaf - unspecified
Echinodorus cordifolius (Alismataceae) - leaf - basal or on lower stem
Image of Echinodorus cordifolius (Alismataceae) - leaf - basal or on lower stem
Echinodorus cordifolius (Alismataceae) - leaf - unspecified
Image of Echinodorus cordifolius (Alismataceae) - leaf - unspecified
Echinodorus cordifolius (Alismataceae) - inflorescence - ventral view of flower + perianth
Image of Echinodorus cordifolius (Alismataceae) - inflorescence - ventral view of flower + perianth
Echinodorus cordifolius (Alismataceae) - inflorescence - whole - unspecified
Image of Echinodorus cordifolius (Alismataceae) - inflorescence - whole - unspecified
Echinodorus cordifolius (Alismataceae) - inflorescence - frontal view of flower
Image of Echinodorus cordifolius (Alismataceae) - inflorescence - frontal view of flower
Echinodorus cordifolius (Alismataceae) - inflorescence - lateral view of flower
Image of Echinodorus cordifolius (Alismataceae) - inflorescence - lateral view of flower
Data from: The evolution of males: support for predictions from sex allocation theory using mating arrays of Sagittaria latifolia (Alismataceae)
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Increased spatial-genetic structure in a population of the clonal aquatic plant Sagittaria latifolia (Alismataceae) following disturbance
Open the record for dataset details and reuse information.
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