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20 results for “Varronia”
Data from: Genetic diversity and population structure of Varronia curassavica: a medicinal polyploid species in a threatened ecosystem
Varronia curassavica is an important medicinal species associated with the restinga, one of the most threatened coastal ecosystems of the Atlantic Forest. These circumstances call for studies aimed at estimating effective population size and gene flow to improve conservation efforts. Hence, the present study aimed to characterize the genetic diversity, ploidy level and population structure of this species in different areas of restinga using microsatellites. Varronia curassavica was characterized as an autotetraploid, with high genetic variability, low divergence, and no significant fixation indices, indicating the absence of, or reduced, inbreeding and genetic drift in the study area. About 44 % of the alleles occurred at low frequency in adults of all populations and 41 % in the progenies evaluated. Gene flow was high, consistent with outcrossing species with high dispersal capacity (Nm = 4.87). The results showed no tendency toward isolation by distance. The estimated effective size indicates that the populations studied have the potential to ensure conservation of the species in the long term. The genetic variability and population structure of V. curassavica, as determined in this study, could form the foundation for activities directed toward the sustainable use of this resource and its conservation. Even though the restinga ecosystem has suffered dramatic reductions in area, this study provides evidence that this species is resilient to anthropogenic threats to its genetic integrity, since it is a polyploid with self-incompatibility mechanisms that contribute to maintaining high genetic diversity in an panmictic meta-population along the coast of Santa Catarina.
Fig. 6 Vascularisation. A–G, J–L, V in Flower and fruit anatomy of Cordia nodosa Lam. and Varronia bonplandii Desv. (Cordiaceae, Boraginales) with phylogenetic implications
Fig. 6 Vascularisation. A–G, J–L, V. bonplandii (yellow frames). H, C. nodosa (blue frames). A–D, TS of gynoecium from apex to base (corresponding levels are indicated in Fig. 6E, F). E, F, LS showing the branching of sepal, petal, stamen and carpel bundles. G, H, LS showing ovule vascularisation (dashed line indicates the section level of Fig. 6A). J, K, TS of receptacle and pedicel showing splitting of vascular strands in sepals, petals, stamens and the ring-shaped stele. L, TS of a fruit.
Fig. 4 in Flower and fruit anatomy of Cordia nodosa Lam. and Varronia bonplandii Desv. (Cordiaceae, Boraginales) with phylogenetic implications
Fig. 4 Gynoecial architecture (loculaments and vasculature; all TS are arranged with the carpels positioned in the median plane of the flower). A, C–F, V. bonplandii (yellow frames). B, G–K, C. nodosa (blue frames). A, B, gynoecia. C–K, serial TSs of gynoecium (corresponding levels are indicated in Fig. 1). Abbreviations: as, apical septum; cc, carpel
Fig. 1 in Flower and fruit anatomy of Cordia nodosa Lam. and Varronia bonplandii Desv. (Cordiaceae, Boraginales) with phylogenetic implications
Fig. 1 Internal gynoecial architecture of Cordiaceae (including vascularisation in red), built by the formation of septa. The idealised longisection shows the anatomy of two planes: the bold blue line represents the primary loculament in median section through the false septa, while a primary septum, to which the funiculi and the ovules are attached, is presented as dashed line in the back. Regions of the peltate-ascidiate organ are indicated as well as the level of transverse sections in Fig. 4. Abbreviations: as, apical septum; bs, basal septum; db, dorsal bundle; f, funiculus; fs, false septum; o, ovule; pb, placental bundle; rb, raphal bundle; ts, primary septum; tt, pollen tube transmitting tract; vb, ventral bundle
Figs. 1–6 in Notes on Natural History of Polychalca (Desmonota) Hope, 1839 (Coleoptera: Chrysomelidae: Cassidinae: Omocerini) on the Host Plant Varronia globosa Jacq. (Boraginaceae) in Brazil
Figs. 1–6. Biology of Polychalca (Desmonota) sp. 1) Map of Brazil showing our two reported sites (black circles) in the Caatinga region, municipality of Jacaré dos Homens, Alagoas state; 2) Habitat at site 1 showing the host plant Varronia globosa (black arrow); 3) Habitat at site 2; 4) Host plant flower; 5) Larvae of different instars; 6) Mature larva on leaf of host plant.
Figs. 7–12 in Notes on Natural History of Polychalca (Desmonota) Hope, 1839 (Coleoptera: Chrysomelidae: Cassidinae: Omocerini) on the Host Plant Varronia globosa Jacq. (Boraginaceae) in Brazil
Figs. 7–12. Adult and immature stages of Polychalca (Desmonota) sp. 7) Leaf with damage caused by larvae; note the cast exuviae (white arrow) and feces (black arrow); 8) Pupa; 9) Adult in its natural habitat showing arched elytra (white arrow); 10) Three hatched eggs (white arrow) on leaf; 11) Egg mass of 12 unhatched eggs on leaf (white arrow); 12) Two hatched eggs on stem (white arrow).
FIGURE 4. A–B Varronia johnstoniana. A in A new species of Varronia (Cordiaceae) and a checklist of Boraginales for the State of Sergipe, Brazil
FIGURE 4. A–B Varronia johnstoniana. A. Holotype (J.E. Nascimento-Júnior et al. 976). B. Detail of the inflorescence types.
FIGURE 1 in A new species of Varronia (Cordiaceae) and a checklist of Boraginales for the State of Sergipe, Brazil
FIGURE 1. Map of Sergipe State, northeastern Brazil, highlighting the Serra de Itabaiana National Park (PARNA).
FIGURE 2. A–F Varronia johnstoniana. A in A new species of Varronia (Cordiaceae) and a checklist of Boraginales for the State of Sergipe, Brazil
FIGURE 2. A–F Varronia johnstoniana. A. Habit (J.E. Nascimento-Júnior et al. 976). B. Flower (G. Viana 1121). C. Open corolla, showing the androecium. D. Gynoecium. E–F. Fruit. E. Frontal view. F. Lateral view (J.E. Nascimento-Júnior et al. 986).
FIGURE 3. A–I in A new species of Varronia (Cordiaceae) and a checklist of Boraginales for the State of Sergipe, Brazil
FIGURE 3. A–I Boraginales species of Sergipe State, Brazil. A. Cordia sellowiana. B. C. trichotoma. C. Euploca polyphylla. D. Heliotropium elongatum. E. Myriopus salzmannii. F. M. villosus. G. Tournefortia bicolor. H. Varronia curassavica. I. V. leucocephala. (Photos: A, H, I, D.D. Vieira; B, L. Nusbaumer; C–E, J.I.M. Melo; F, L. Cavalheiro; G, J.D. García G.).
FIGURE 3 in A new species of Varronia P. Browne (Cordiaceae) from central Colombia
FIGURE 3. Light micrographs of a dried specimen of Varronia teguorum. A. Insertion of the petiole in the branch, the base of the leaf blade, and the axillary bud. B. Adaxial surface of leaf blade: impressed venation and indumentum with conspicuous long hairs along the veins and cystolithic pustules. C. Abaxial surface of leaf blade showing prominent reticulate venation (2º, 3º, and 4º orders) and hairs with cystolithic pustules. D. Slightly adnate region of the petiole (right) with the inflorescence axis (left). E. Young inflorescence, showing the indumentum of the peduncle and the incurved appendages of the calyx lobes. F. Inflorescence rachis, showing its dense indumentum and the flower arrangement. G. Inflorescence with flowers at anthesis: G1. Two open flowers showing the corolla lobes and some dehisced anthers; G2. Open flower, showing the glabrous anthers covering the corolla throat. Scale bar in all cases = 5 mm long. (Voucher: Fernández-Alonso 24079, COL). Photos by J.L. Fernández-Alonso.
FIGURE 2 in A new species of Varronia P. Browne (Cordiaceae) from central Colombia
FIGURE 2. Field images of Varronia teguorum. A. Apex of a young branch, showing the rusty indumentum and the tertiary and quaternary veins on the leaf adaxial surface. B. Branch with developed axillary inflorescences, showing floral buds. C. Branch with an inflorescence. D. Inflorescences with some flowers at anthesis (white corolla) and others at post-anthesis (senescent corolla), and immature fruits (red). E. Inflorescences with an open flower at a basal position, showing the senescent flowers with accrescent calyx and incurved lobes obscuring the calyx throat. Scale bar in all cases = 15 mm long. Photos by J.L. Fernández-Alonso taken in the type locality, Santa María, Boyacá.
FIGURE 1 in A new species of Varronia P. Browne (Cordiaceae) from central Colombia
FIGURE 1. Image of the isotype of Varronia teguorum Fern. Alonso & J.I.M. Melo, Fernández-Alonso 24079 (MA 888445).
Data from: Genetic diversity and population structure of Varronia curassavica: a medicinal polyploid species in a threatened ecosystem
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Data from: Reproductive strategy of the polyploid species Varronia curassavica jacq. in restinga environment
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FIGURE 4 in A new species of Varronia P. Browne (Cordiaceae) from central Colombia
FIGURE 4. Map showing the type locality of Varronia teguorum.
Fig. 5 Gynoecial architecture and intraspecific variability. A–C, F, G, C in Flower and fruit anatomy of Cordia nodosa Lam. and Varronia bonplandii Desv. (Cordiaceae, Boraginales) with phylogenetic implications
Fig. 5 Gynoecial architecture and intraspecific variability. A–C, F, G, C. nodosa (blue frames). D, E, H–K, V. bonplandii (yellow frames). A, LS of carpel with two hemianatropous ovules. B, LS of stigma with pollen. C, LS of gynoecium. D, LS of hemianatropous ovule. E, F, LS of egg apparatus (white arrow indicates stalk under chalazal haustorium). G, TS of gynoecium with four locules and only two fertile ovules (i.e., one ovule per carpel). H, flower at anthesis with two styles, ten stamens and ten petals (arrow indicates dehiscence line of thecae). J, flower after
Fig. 2 Flower and perianth. A–E, G, V in Flower and fruit anatomy of Cordia nodosa Lam. and Varronia bonplandii Desv. (Cordiaceae, Boraginales) with phylogenetic implications
Fig. 2 Flower and perianth. A–E, G, V. bonplandii (yellow frames). F, H–L, C. nodosa (blue frames). A, inflorescence. B, bud (arrow indicates detached adaxial calyx epidermis). C, flower. D, gynoecium after anthesis in opened calyx (arrow indicates delaminated adaxial calyx epidermis). E, F, TS of sepals, petals and gynoecium (level of corolla tube). G, LSs of bud (left) and developing fruit (right; upper arrow indicates delaminated adaxial calyx epidermis, lower arrow indicates abscission area of the detached corolla tube). H, inflorescence. J, bud (right) and flower. K, operculate calyx (corolla shed). L, LSs of bud (left; arrow indicates constriction between the receptacle and the pedicel), flower at anthesis (middle) and flower after anthesis (right). Abbreviations: a, anther; c, corolla; d, disc; g, ovary; k, calyx; LS, longisection; o, ovule (or young seed); stg, stigma; sty, style; tr, trichomes; TS, transverse section
Fig. 3 Anthers and pollen. A, C, D, F, K–M, V in Flower and fruit anatomy of Cordia nodosa Lam. and Varronia bonplandii Desv. (Cordiaceae, Boraginales) with phylogenetic implications
Fig. 3 Anthers and pollen. A, C, D, F, K–M, V. bonplandii (yellow frames). B, E, G–J, C. nodosa (blue frames). A, opened corolla tube with trichomes (arrow). B–D, TS of anthers (arrows indicate dehiscence line, note crystals under phase-contrast microscopy in D). E, flower, stamens and yellow trichomes (arrow). F–H, TS of anther walls (arrows indicate binuclear tapetum cells). J, K, tricolporate and triporate pollen
Behavioral and antennal responses of Tribolium confusum to Varronia globosa essential oil and its main constituents: Per-spective for their use as repellent
<p>Datasets of manuscript for publication in Molecules (MDPI)</p>
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