Log in

Relevant bibliographies by topics / Zamia / Journal articles

To see the other types of publications on this topic, follow the link: Zamia.

Journal articles on the topic 'Zamia'

Author: Grafiati

Published: 4 June 2021

Last updated: 29 January 2023

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Zamia.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

Norswg, Knut J., Priscilla K. S. Fawcen, and Andrew P. Vovides. "Beetle pollination of two species of Zamia: evolutionary and ecological considerations." Journal of Palaeosciences 41 (December 31, 1992): 149–58. http://dx.doi.org/10.54991/jop.1992.1116.

Full text

Abstract:

Two species of cycads in Florida are invariably pollinated by beetles. The native Florida Zamia pumila L. is pollinated by a snout weevil, Rhopalotria slossoni Schaeffer, and a clavicorn beetle, Pharaxonotha zamiae Blake. An introduced cycad, Z. furfuracea L. fil., is pollinated by the snout weevil, R. mollis Sharp, apparently introduced from Mexico along with its host. Observations and experiment show that zamias are dependent upon pollinating beetles for their reproduction, and, in turn, the pollinating insects are dependent upon the cycads for brood places, food and shelter. The two cycads have evolved similar “rewards” which function as pollinator attractants. The importance of these coevolutionary inter-relationship for the ecology and conservation of these cycad species is unquestionable. Neither the insects nor the cycads are separately capable of long term survival in nature, and unless both are protected and conserved, wild populations of Zamia are in jeopardy.

APA, Harvard, Vancouver, ISO, and other styles

2

LINDSTRÖM, ANDERS J., MICHAEL CALONJE, DENNIS STEVENSON, CHAD HUSBY, and ALBERTO TAYLOR. "Clarification of Zamia acuminata and a new Zamia species from Coclé Province, Panama." Phytotaxa 98, no. 2 (May 8, 2013): 27. http://dx.doi.org/10.11646/phytotaxa.98.2.1.

Full text

Abstract:

Zamia acuminata has remained an obscure, poorly understood species for over a century due to possibly misinterpreted or erroneous locality data on the unicate sterile type specimen, a very brief protologue description, the misidentification of the plants from El Valle de Antón in Panama as Z. acuminata, and the erroneous determinations of plants of Z. acuminata from Costa Rica as Z. fairchildiana. Recently collected material from San José Province in Costa Rica is here determined to be identical to the single sterile leaf material of the holotype of Zamia acuminata. We consider Z. acuminata to be a Costa Rican endemic species restricted to the western Talamanca mountain range in San José Province, and that the Zamia from El Valle de Antón in Panama, which has previously been referred to as Zamia acuminata, to be a new species, here described as Zamia nana.

APA, Harvard, Vancouver, ISO, and other styles

3

SKELLEY, PAUL E., and ROSANE SEGALLA. "A new species of Pharaxonotha Reitter (Coleoptera: Erotylidae) from central South America." Zootaxa 4590, no. 1 (April 24, 2019): 184. http://dx.doi.org/10.11646/zootaxa.4590.1.9.

Full text

Abstract:

Pharaxonotha cerradensis, new species (Coleoptera: Erotylidae), is described from Bolivia and Brazil. It belongs in a complex of species from Mexico and Central America that radiated on host cycads of the genus Zamia L. (Cycadales: Zamiaceae) and is associated with Zamia boliviana (Brongniart) A. DC. (Cycadales: Zamiaceae). Pharaxonotha cerradensis is compared with other species of Pharaxonotha Reitter.

APA, Harvard, Vancouver, ISO, and other styles

4

Marler, Thomas E., and Michael Calonje. "Stem Branching of Cycad Plants Informs Horticulture and Conservation Decisions." Horticulturae 6, no. 4 (October 8, 2020): 65. http://dx.doi.org/10.3390/horticulturae6040065.

Full text

Abstract:

The number of branches in male and female plants of Cycas micronesica K.D. Hill, Cycas edentata de Laub., Cycas wadei Merr., and Zamia encephalartoides D.W. Stev. were counted in Guam, Philippines, and Colombia, to confirm earlier reports that female plants develop fewer branches than males. Cycas plants produce determinate male strobili and indeterminate female strobili, but Zamia plants produce determinate strobili for both sexes. More than 80% of the female trees for each of the Cycas species were unbranched with a single stem, but more than 80% of the male trees exhibited two or more branches. The mean number of branches on male plants was more than double that of female plants. The number of branches of the Zamia male plants was almost triple that of female plants. Moreover, the Zamia plants produced 2.8-fold greater numbers of branches than the mean of the Cycas plants. Most of Guam’s unsexed C. micronesica trees in 2004 were unbranched, but after 15 years of damage from non-native insect herbivores, most of the remaining live trees in 2020 contained three or more branches. The results confirm that male Cycas and Zamia plants produce more branches than female plants and suggest cycad species with determinate female strobili produce more branches on female plants than species with indeterminate female strobili. Our results indicate that the years of plant mortality on Guam due to non-native insect herbivores have selectively killed more female C. micronesica trees. Horticulture and conservation decisions may be improved with this sexual dimorphism knowledge.

APA, Harvard, Vancouver, ISO, and other styles

5

CALONJE, MICHAEL, CRISTINA LÓPEZ-GALLEGO, and JONATAN CASTRO. "Zamia paucifoliolata, a new species of Zamia (Zamiaceae, Cycadales) from Valle del Cauca, Colombia." Phytotaxa 385, no. 2 (December 28, 2018): 85. http://dx.doi.org/10.11646/phytotaxa.385.2.4.

Full text

Abstract:

Zamia paucifoliolata, a new cycad species from the Pacific lowlands of Valle del Cauca, Colombia, is described and illustrated. It is distinguished from other species of Zamia by having an underground stem typically bearing large solitary leaves with eighteen or fewer leaflets, villous strobilar axes, microsporangia borne on both the abaxial and adaxial side of microsporophylls, and seeds that are longer than 18 mm. It is compared to Z. pyrophylla, Z. cunaria, and Z. ipetiensis, species which it most closely resembles.

APA, Harvard, Vancouver, ISO, and other styles

6

Herrera‐Blitman, Natalia, Michael Calonje, Jan Meerman, Rudy Aguilar, Alan W. Meerow, Javier Francisco‐Ortega, and M. Patrick Griffith. "1039 ZAMIA DECUMBENS: Cycadales, Zamiaceae." Curtis's Botanical Magazine 39, no. 3 (August 26, 2022): 517–39. http://dx.doi.org/10.1111/curt.12459.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

HALL, W. T. K. "Cycad (zamia) poisoning in Australia." Australian Veterinary Journal 64, no. 5 (May 1987): 149–51. http://dx.doi.org/10.1111/j.1751-0813.1987.tb09667.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

8

Calonje, Michael, GUSTAVO MORALES, CRISTINA LÓPEZ-GALLEGO, and FRANCISCO JAVIER ROLDÁN. "A taxonomic revision of Zamia montana and Zamia oligodonta, with notes on their conservation status." Phytotaxa 192, no. 4 (January 15, 2015): 279. http://dx.doi.org/10.11646/phytotaxa.192.4.5.

Full text

Abstract:

The taxonomy of Zamia montana and Z. oligodonta, two poorly understood species occurring at high elevations in the Western Cordillera of Colombia, is discussed. Zamia oligodonta was recently synonymized under Z. montana, but information derived from recent field studies is provided showing the two species are quite distinct. A treatment of both species is presented, including discussion of the major morphological differences between them and also between other South American species with prominently-veined leaflets. The conservation status of both species is evaluated.

APA, Harvard, Vancouver, ISO, and other styles

9

Deloso, Benjamin E., Anders J. Lindström, Frank A. Camacho, and Thomas E. Marler. "Highly Successful Adventitious Root Formation of Zamia L. Stem Cuttings Exhibits Minimal Response to Indole-3-Butyric Acid." HortScience 55, no. 9 (September 2020): 1463–67. http://dx.doi.org/10.21273/hortsci15212-20.

Full text

Abstract:

The influences of indole-3-butyric acid (IBA) concentrations of 0–30 mg·g−1 on the success and speed of adventitious root development of Zamia furfuracea L.f. and Zamia integrifolia L.f. stem cuttings were determined. Root formation success for both species was greater than 95%. The IBA concentrations did not influence the speed of root development for Z. furfuracea, but the Z. integrifolia cuttings that received IBA concentration of 3 mg·g−1 generated adventitious roots more slowly than the cuttings in the control group. The ending dry weights of the stems, leaves, and roots were not influenced by IBA concentration for either species. Our results indicated that adventitious root formation on stem cuttings of these two Zamia species is successful without horticultural application of IBA. Additional IBA studies are needed on the other 300+ cycad species, especially those that are in a threatened category.

APA, Harvard, Vancouver, ISO, and other styles

10

Vovides, Andrew P., Roger Guevara, Mario Coiro, Sonia Galicia, and Carlos Iglesias. "Pollen morphology of the Megamexican cycads reveals the potential of morphometrics to identify cycad genera." Botanical Sciences 99, no. 1 (November 1, 2020): 182–97. http://dx.doi.org/10.17129/botsci.2696.

Full text

Abstract:

Background: Although pollen morphology has always been an important tool in plant systematics, the possibility of distinguishing between related taxa is still debated. A difficult case is the cycads, where their morphology and small size is very similar. Pollen morphology has been important in plant systematics and determination at the species level is possible depending on the group. Controversial cases are the cycads, where their small pollen and smooth sculpture when observed under light microscopy present few useful characters for separation at the species level. Question: Will cycad pollen morphometry be useful to distinguish taxa? Study species: 15 species within the genera Ceratozamia, Dioon and Zamia were investigated with five species of each genus. Methods: Pollen was obtained from both live specimens from the Clavijero Botanic Garden of the Instituto de Ecología, A.C., as well as herbarium specimens. Acetolyzed pollen was used for descriptions and morphometry, and non-acetolyzed pollen for SEM images. Results: The thickness of the exine and pollen sculpture of Dioon differed from that of Ceratozamia and Zamia thus allowing its identification. The pollen morphology of Ceratozamia and Zamia is very similar and therefore difficult to distinguish between species. Conclusions: The thicker exine of Dioon allows its pollen to be distinguished from the other two genera. Morphometric methods must be applied to distinguish pollen between species of Ceratozamia and Zamia.

APA, Harvard, Vancouver, ISO, and other styles

11

SEGALLA, ROSANE, and MICHAEL CALONJE. "Zamia brasiliensis, a new species of Zamia (Zamiaceae, Cycadales) from Mato Grosso and Rondônia, Brazil." Phytotaxa 404, no. 1 (May 16, 2019): 1. http://dx.doi.org/10.11646/phytotaxa.404.1.1.

Full text

Abstract:

Zamia brasiliensis Calonje & Segalla, a new subterranean-stemmed species of Zamia (Zamiaceae) from Mato Grosso and Rondônia, Brazil, is described and illustrated. It is compared to two morphologically similar species with adjacent geographic distributions: Z. boliviana from the Cerrado biome, and the Amazonian species Z. ulei. The new species shares unarmed petioles with Z. boliviana but is readily distinguishable by its much broader leaflets. Z. brasiliensis has leaflets somewhat resembling those of juvenile individuals of Z. ulei, but the latter species is easily differentiated by the presence of prickles on its petiole.

APA, Harvard, Vancouver, ISO, and other styles

12

Montalvo-Fernández, Grecia, Lorenzo Felipe Sánchez-Teyer, Germán Carnevali, Andrew P. Vovides, Ricardo Gaytán-Legaria, Matilde Margarita Ortíz -García, Jaime Alejandro Muñoz-López, and Jaime Martínez Castillo. "Impact of Late Pleistocene-Holocene climatic fluctuations on the phylogeographic structure and historical demographics of Zamia prasina (Cycadales: Zamiaceae)." Botanical Sciences 97, no. 4 (December 19, 2019): 588–608. http://dx.doi.org/10.17129/botsci.2195.

Full text

Abstract:

Background: Glacial periods during the Pleistocene have been hypothesized to have greatly influenced geographical patterns of genetic structure and demography of many tropical species. The Glacial Refugium Hypothesis proposes that, during cold, dry glacial periods, populations of moisture-affinities tropical species were restricted to sheltered, humid areas and that, during warmer and more humid interglacial periods, these populations expanded. Some mountain regions in the tropics acted as refugia during the cold, dry periods of the Pleistocene for several temperate forest taxa, which recolonized the humid areas farther north during the interglacial periods.Questions: (1) Did Late Pleistocene-Holocene climate changes affect the historical demophraphy of Zamia prasina? (2) Does the historical distribution of Zamia prasina agree with the Glacial Refugium Hypothesis?Study species: Zamia prasina W.Bull. (Zamiaceae), the only cycad native to the Yucatan Peninsula Biotic Province (YPBP). Methods: Five individuals were collected in 23 populations and characterized using two DNA regions: plastid atpF-atpH, and nuclear ITS2. Genetic diversity, phylogeographic structure, historical demography, and potential distributions were assessed. Results: Our results showed moderately high genetic diversity and low, but significant, phylogeographic structure. Two genetic groups were identified, one in the eastern part of the Peninsula, the other in the western. The changes in historical demography suggest that Z. prasina experienced a population expansion following the warm conditions of the Holocene.Conclusions: The population dynamics of Zamia prasina are in accordance with the Glacial Refugium Hypothesis.

APA, Harvard, Vancouver, ISO, and other styles

13

Segalla, Rosane, Francismeire Jane Telles, Fábio Pinheiro, and Patrícia Morellato. "A Review of Current Knowledge of Zamiaceae, With Emphasis on Zamia From South America." Tropical Conservation Science 12 (January 2019): 194008291987747. http://dx.doi.org/10.1177/1940082919877479.

Full text

Abstract:

Zamiaceae, a family of the ancient order Cycadales, is distributed throughout the tropical and subtropical regions of both the Old and New Worlds. Here, we present a systematic review of Zamiaceae with emphasis on Zamia species from South America. We aim to (a) establish the current knowledge, (b) identify research gaps, and (c) indicate directions for future studies, discussing ecology and conservation of South America species. The search recovered 508 papers, further classified into 11 research topics: taxonomy and systematics, morphology, biochemistry, genetics, phylogeography, population ecology, reproductive biology, ecological interactions, plant propagation, conservation, and reviews. The number of publications doubled in the 21st century, mostly focusing on genetics ( n = 60), taxonomy and systematics ( n = 52), morphology ( n = 36), ecological interactions ( n = 30), and an increasing interest in population ecology ( n = 29) and conservation ( n = 32). Studies are concentrated in North and Central America (54% of all studies) with just 6% (29) addressing South America species of Zamia. Overall, studies point out the key role of pollinators in promoting gene flow through pollen dispersal among populations of Zamiaceae. Therefore, investigate natural history, ecology, reproductive biology, genetic, and phylogeography, especially for South America species, are needed. Moreover, the implementation of in situ and ex situ collections and germplasm banks linked to botanical gardens are essential for the conservation and reestablishment of local populations of critically endangered Zamia species in South America. Concomitantly, we suggest studies modeling the distribution of Zamia species in future climate change scenarios.

APA, Harvard, Vancouver, ISO, and other styles

14

CALONJE, MICHAEL, JONATAN CASTRO HERNÁNDEZ, LUIS FERNANDO COCA, DANIEL JARAMILLO, and ARTURO ARISTIZÁBAL. "Two new species of Zamia (Zamiaceae, Cycadales) from the Magdalena-Urabá moist forests ecoregion of northern Colombia." Phytotaxa 497, no. 1 (April 16, 2021): 1–19. http://dx.doi.org/10.11646/phytotaxa.497.1.1.

Full text

Abstract:

We describe and illustrate Zamia imbricata and Z. sinuensis, two new species (Zamiaceae, Cycadales) from the Magdalena-Urabá moist forests ecoregion of northern Colombia. The new species appear to belong to the manicata clade, an assemblage of species strongly supported by recent molecular phylogenetic analyses and which shares a set of morphological characters such as hypogeous to semi-hypogeous stems, distinctly toothed leaflets, long peduncles, megasporophylls with relatively flat shields, and diminutive pollen cones containing microsporophylls with a much-reduced fertile section of the lamina. Zamia imbricata, a species from the Middle Magdalena Valley Basin of Caldas, is distinguished from other members of the clade by its planar leaves comprised of diminutive, highly imbricate papyraceous leaflets. Zamia sinuensis, a species from the Sinú River Basin of Córdoba is similar to Z. manicata, from which it is distinguished by the absence of the petiolule and gland-like collar that characterize the latter, and by its strongly undulate leaflets. The two new species are discussed within the context of the manicata clade, and a vegetative key to the clade is provided.

APA, Harvard, Vancouver, ISO, and other styles

15

Pagán-Jiménez, Jaime R., and Julio C. Lazcano-Lara. "Toponymic Data Helps to Reveal the Occurrence of Previously Unknown Populations of Wild Zamia pumila L. on Volcanic Substrates in South Central Puerto Rico." Ethnobiology Letters 4 (March 8, 2013): 52–58. http://dx.doi.org/10.14237/ebl.4.2013.9.

Full text

Abstract:

This is the first report of the occurrence of wild Zamia pumila L. Zamiaceae populations on various volcanic substrates in the piedmont area of south central Puerto Rico. Data acquisition and its field confirmation were possible after the identification of toponymic names in old and current maps, and historic documents of the island in which one of the indigenous names for the genus (marunguey [marungüey] or marungueyes) has been used for naming some localities. These preliminary data have deep implications for paleo- and neoethnobotanical research, and for population ecology of the species in Puerto Rico, because they expand the traditionally accepted range for the species on the island. Zamia has been described as one of the main food plants among pre- and post-Columbian inhabitants in two islands of the Greater Antilles, Hispaniola and Puerto Rico, where the most sophisticated pre-Columbian society of the Antilles, the Taínos, emerged. Our findings suggest that Zamia might have been more available to humans, as a food source, than previously thought.

APA, Harvard, Vancouver, ISO, and other styles

16

Stevenson, Dennis Wm, Dairon Cárdenas López, and Nicolás Castaño Arboleda. "A new Zamia (Zamiaceae) from Colombia." Brittonia 70, no. 3 (June 19, 2018): 364–68. http://dx.doi.org/10.1007/s12228-018-9535-3.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Norstog, K. J. "The Blepharoplast of Zamia pumila L." Botanical Gazette 147, no. 1 (March 1986): 40–46. http://dx.doi.org/10.1086/337566.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Deloso, Benjamin E., Charles J. Paulino, and Thomas E. Marler. "Leaf Retention on Stem Cuttings of Two Zamia L. Species With or Without Anti-transpirants Does Not Improve Adventitious Root Formation." Tropical Conservation Science 13 (January 2020): 194008292096690. http://dx.doi.org/10.1177/1940082920966901.

Full text

Abstract:

Improved horticultural practices may help to reduce demand for wild cycads threatened by unsustainable collection. We determined the influences of leaf retention with or without anti-transpirants on the success and speed of adventitious root development of Zamia furfuracea L.f. and Zamia integrifolia L.f. stem cuttings. Root formation success for both species was greater than 95%. The experimental treatments did not influence the percentage success or the speed of root development for Z. furfuracea or Z. integrifolia. The ending dry weights of the stems, leaves, and roots were also not influenced by the experimental treatments. Our results indicated that adventitious root formation on stem cuttings of these two Zamia species was highly successful with or without retained leaves, and horticultural application of transpiration-reducing products on retained leaves did not improve success. Our findings add to the growing body of evidence that show how the horticulture nursery industry can meet horticultural demands in an effort to stop wild harvesting of threatened plants. Conservation of cycads as a group would benefit from more horticulture studies such as this, especially if the research includes threatened species.

APA, Harvard, Vancouver, ISO, and other styles

19

Calonje, Michael, Alan W. Meerow, Lindy Knowles, David Knowles, M. Patrick Griffith, Kyoko Nakamura, and Javier Francisco-Ortega. "Cycad biodiversity in the Bahamas Archipelago and conservation genetics of the threatened Zamia lucayana (Zamiaceae)." Oryx 47, no. 2 (April 2013): 190–98. http://dx.doi.org/10.1017/s0030605312000129.

Full text

Abstract:

AbstractA conservation assessment for the three cycad species native to the Bahamas Islands is presented. Results are based on field surveys on all islands where these species occur. Zamia angustifolia is native to Eleuthera, Zamia integrifolia is native to Abaco, Andros, Eleuthera, Grand Bahama and New Providence, and Zamia lucayana is endemic to Long Island. Z. angustifolia is of the highest conservation concern because of the small number of adult plants, its restricted distribution and the extensive development occurring within its habitat. Z. integrifolia also has a restricted distribution on Eleuthera and Grand Bahama and, although threatened by urban development in New Providence, it is relatively common on Abaco and Andros. Z. lucayana comprises three populations within a narrow strip of land of c. 1 km2; we propose a reassignment of its current conservation status from Endangered to Critically Endangered. We assessed the genetic structure of Z. lucayana based on 15 polymorphic microsatellite DNA loci; this indicated that the three known populations should be considered a single management unit. However, the high number of private alleles suggests that genetic drift, indicative of recent fragmentation, is progressing. We propose in situ conservation strategies, and we also collected germplasm from a total of 24 populations of these three cycad species, for ex situ conservation.

APA, Harvard, Vancouver, ISO, and other styles

20

Schutzman, Bart. "A New Species of Zamia from Honduras." Systematic Botany 14, no. 2 (April 1989): 214. http://dx.doi.org/10.2307/2418907.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

MEEROW, ALAN W., and KYOKO NAKAMURA. "Ten microsatellite loci from Zamia integrifolia (Zamiaceae)." Molecular Ecology Notes 7, no. 5 (September 2007): 824–26. http://dx.doi.org/10.1111/j.1471-8286.2007.01716.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

22

LINDBLAD, P., B. BERGMAN, A. V. HOFSTEN, L. HALLBOM, and J. E. NYLUND. "THE CYANOBACTERIUM-ZAMIA SYMBIOSIS: AN ULTRASTRUCTURAL STUDY." New Phytologist 101, no. 4 (December 1985): 707–16. http://dx.doi.org/10.1111/j.1469-8137.1985.tb02876.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Nicolalde-Morejón, Fernando, Andrew P. Vovides, and Dennis W. Stevenson. "Taxonomic revision of Zamia in Mega-Mexico." Brittonia 61, no. 4 (December 2009): 301–35. http://dx.doi.org/10.1007/s12228-009-9077-9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

24

Keever, G. J., and G. S. Cobb. "Container Production of Comptie, Zamia furfuracea Ait." Journal of Environmental Horticulture 4, no. 3 (September 1, 1986): 89–91. http://dx.doi.org/10.24266/0738-2898-4.3.89.

Full text

Abstract:

The effects of cultural factors on growth of comptie, Zamia furfuracea Ait., were evaluated. Plant growth was increased under 47% shade compared to 72% shade and when 1.2 kg m−3 (2 lb yd−3) dolomitic limestone was incorporated into the medium compared to 4.7 kg m−3 (8 lb yd−3). Nitrogen fertilization of 200 ppm and 300 ppm per week increased frond number compared to 100 ppm per week whereas container volume had no effect on plant growth.

APA, Harvard, Vancouver, ISO, and other styles

25

Cafasso, Donata, and Gianni Chinali. "An ancient satellite DNA has maintained repetitive units of the original structure in most species of the living fossil plant genusZamia." Genome 57, no. 3 (March 2014): 125–35. http://dx.doi.org/10.1139/gen-2013-0133.

Full text

Abstract:

ZpS1 satellite DNA is specific to the genus Zamia and presents repetitive units organized as long arrays and also as very short arrays dispersed in the genome. We have characterized the structure of the ZpS1 repeats in 12 species representative of the whole geographic distribution of the genus. In most species, the clone most common sequences (cMCS) were so similar that a general most common sequence (GMCS) of the ZpS1 repetitive unit in the genus could be obtained. The few partial variations from the GMCS found in cMCS of some species correspond to variable positions present in most other species, as indicated by the clone consensus sequences (cCS). Two species have an additional species-specific variety of ZpS1 satellite. The dispersed repeats were found to contain more mutations than repeats from long arrays. Our results indicate that all or most species of Zamia inherited the ZpS1 satellite from a common ancestor in Miocene and have maintained repetitive units of the original structure till present. The features of ZpS1 satellite in the genus Zamia are poorly compatible with the model of concerted evolution, but they are perfectly consistent with a new model of satellite evolution based on experimental evidences indicating that a specific amplification-substitution repair mechanism maintains the homogeneity and stability of the repeats structure in each satellite DNA originally present in a species as long as the species exists.

APA, Harvard, Vancouver, ISO, and other styles

26

López, María Cristina, and Álvaro Idárraga. "Estado de conservación de las especies de <i>Zamiaceae</i> del departamento de Antioquia (Colombia)." Actualidades Biológicas 23, no. 75 (November 22, 2017): 23–31. http://dx.doi.org/10.17533/udea.acbi.329596.

Full text

Abstract:

Colombia es uno de los países con mayor diversidad de Cycadas en el Neotrópico, pero la mayoría de las especies en nuestro país se encuentran en riesgo de extinción, principalmente por la destrucción de su hábitat. En este artículo se compila la información existente sobre las especies Zamiaceae del departamento de Antioquia y se hace un diagnóstico del estado de sus poblaciones, para establecer prioridades de investigación y posibles pautas de conservación. Se reportan seis especies de Zamia para el departamento, distribuidas en pocas localidades de Urabá, las cordilleras y los valles interandinos. Zamia maniacata y Z. Obliqua son especies del Chocó biogeográfico, de amplia distribución y con poblaciones grandes, por lo cual no parecen estar seriamente afectadas, aunque pueden ser vulnerables por la destrucción de hábitat. Por el contrario, Z. Melanorrhachis y Zamia sp.1 tienen poblaciones de tamaño mediano que se encuentran en pocas localidades en regiones de alta deforestación, por lo que están amenazadas. Los dos casos más críticos son los de Z. Montana y Z. Wallisii, conocidas de sólo dos enclaves en la cordillera Occidental con poblaciones bastante reducidas, lo que las cataloga en alto riesgo de extinción. Se plantea que Antioquia es un sitio con alta diversidad de Cycadas, y que la mayoría de ellas presentan algún grado de amenaza, por lo cual es necesario establecer programas de protección y de investigación para diseñar estrategias adecuadas de conservación.

APA, Harvard, Vancouver, ISO, and other styles

27

CALONJE, MICHAEL, JULIO BETANCUR, ANDERS LINDSTROM, CRISTINA LOPEZ-GALLEGO, JONATAN CASTRO, CRISTIAN CASTRO, SANTOS MIGUEL NIÑO, and DANIELA CANELON BARRAEZ. "Zamia orinoquiensis (Zamiaceae, Cycadales), a new species from the western Orinoquía region of Colombia." Phytotaxa 556, no. 2 (August 4, 2022): 119–35. http://dx.doi.org/10.11646/phytotaxa.556.2.2.

Full text

Abstract:

Zamia orinoquiensis Calonje, Betancur & A.Lindstr., a new species from the western Orinoquía region of Colombia is described and illustrated. The species is segregated from and compared to Z. muricata Willd., the latter which is morphologically recharacterized, illustrated, and recircumscribed to include populations from tropical dry forest and tropical moist forests in the Lara-Falcón Formation and the Cordillera de la Costa natural regions of Venezuela, as well as the Serranía de Macuira in La Guajira, Colombia. Zamia orinoquiensis is morphologically distinguished from Z. muricata by its leaves bearing fewer, coriaceous (vs. papyraceous) leaflets, eophylls with 2 (vs. 4) leaflets, pollen strobili that are brown to reddish brown (vs. cream to tan) with larger microsporophylls bearing more numerous microsporangia, and ovulate strobili that are dark brown to black (vs. dark olive green to olive brown) at maturity.

APA, Harvard, Vancouver, ISO, and other styles

28

Adams, R. S., B. Schutzman, and A. P. Vovides. "A new Zamia (Zamiaceae, Cycadales) from central Panamá." Phytologia. 85 (1998): 137–45. http://dx.doi.org/10.5962/bhl.part.7783.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Dodson, Calaway H. "A New Species of Zamia (Zamiaceae) from Ecuador." Novon 8, no. 1 (1998): 12. http://dx.doi.org/10.2307/3391883.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Tang, William. "INSECT POLLINATION IN THE CYCAD ZAMIA PUMILA (ZAMIACEAE)." American Journal of Botany 74, no. 1 (January 1987): 90–99. http://dx.doi.org/10.1002/j.1537-2197.1987.tb08582.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

31

Marler, Thomas E., and Leah E. Willis. "Leaf Gas-exchange Characteristics of Sixteen Cycad Species." Journal of the American Society for Horticultural Science 122, no. 1 (January 1997): 38–42. http://dx.doi.org/10.21273/jashs.122.1.38.

Full text

Abstract:

Leaf gas exchange characteristics for 16 species of cycad were determined under field conditions in Miami, Fla. Net CO2 assimilation (ACO2) ranged from 4.9 μmol·m-2·s-1 for Lepidozamia peroffskyana Regel to 10.1 μmol·m-2·s-1 for Zamia furfuracea L. fil. in Aiton. Stomatal conductance to H2O (gs) was more variable, ranging from 85 mmol·m-2·s-1 for Cycas seemannii A. Br. to 335 mmol·m-2·s-1 for Encephalartos hildebrandtii A. Br. & Bouche. Transpiration (E) ranged from 1.7 mmol·m-2·s-1 for Cycas chamberlainii W.H. Brown & Keinholz to 4.8 mmol·m-2·s-1 for Encephalartos hildebrandtii. Highly variable E was more controlling of water-use efficiency than the less-variable ACO2. The difference between air and pinnae temperature ranged from 0.3 to 1.6 °C and was inversely related to mean gs among the species. The values within geographic regions representative of the native habitats of the species were highly variable. For example, two of the African species exhibited the highest and lowest values of water-use efficiency in the survey. Leaf gas exchange for the four largest species with arborescent growth form was less than that for the three small species with subterranean or short bulbous growth form. The diurnal variation in leaf gas exchange for Zamia furfuracea exhibited a two-peaked pattern with a distinct midday depression in ACO2 and gs. The ratio of dark respiration to maximum ACO2 for Zamia furfuracea was 0.04. As a group, the values for ACO2 and gs for these cycads ranked at the lower end of the range for all plants species.

APA, Harvard, Vancouver, ISO, and other styles

32

Baldo-Romero, María Á., Lourdes G. Iglesias-Andreu, Mario Vázquez-Torres, Lázaro R. Sánchez-Velásquez, Mauricio Luna-Rodríguez, and Pablo Octavio-Aguilar. "MORPHOMETRIC MARKERS FOR GENDER IDENTIFICATION IN Zamia furfuracea L. f. (Zamiaceae)." Revista Chapingo Serie Ciencias Forestales y del Ambiente XIX, no. 3 (December 2013): 425–34. http://dx.doi.org/10.5154/r.rchscfa.2013.03.010.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Chiappini, Dave. "Propagation protocol for the native cycad coontie (Zamia pumilaL.)." Native Plants Journal 8, no. 2 (July 2007): 123–24. http://dx.doi.org/10.2979/npj.2007.8.2.123.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Schutzman, Bart, and Andrew P. Vovides. "A New Zamia (Zamiaceae, Cycadales) from Eastern Chiapas, Mexico." Novon 8, no. 4 (1998): 441. http://dx.doi.org/10.2307/3391871.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Tang, William. "Seed dispersal in the cycad Zamia pumila in Florida." Canadian Journal of Botany 67, no. 7 (July 1, 1989): 2066–70. http://dx.doi.org/10.1139/b89-261.

Full text

Abstract:

Seed dispersal of the herbaceous cycad Zamia pumila was studied in the rockland pine forests of southeast Florida. Dispersal activity was found to occur over 6 months and was concentrated in two periods: after seed ripening and prior to seed germination. Seed mass and pulp-to-seed ratios were positively correlated with dispersal success at one study site. Seed shadows were generally asymmetrical in direction, with seeds tending to be deposited under nearby shrubs. Seed germination and seedling establishment is higher in shade than in sun, suggesting that the lower light intensities under shrubs are safe sites for seeds and seedlings.

APA, Harvard, Vancouver, ISO, and other styles

36

Nicolalde-Morejón, Fernando, Andrew P. Vovides, Dennis W. Stevenson, and Victoria Sosa. "The identity of Zamia katzeriana and Z. verschaffeltii (Zamiaceae)." Brittonia 60, no. 1 (March 2008): 38–48. http://dx.doi.org/10.1007/s12228-008-9000-9.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

Taylor Blake, Alberto Sidney, and Gregory Holzman. "A New Zamia Species from the Panama Canal Area." Botanical Review 78, no. 4 (October 10, 2012): 335–44. http://dx.doi.org/10.1007/s12229-012-9105-4.

Full text

APA, Harvard, Vancouver, ISO, and other styles

38

Calonje, Claudia, Chad Husby, and Michael Calonje. "Germination and Early Seedling Growth of Rare Zamia spp. in Organic and Inorganic Substrates: Advancing Ex Situ Conservation Horticulture." HortScience 45, no. 4 (April 2010): 679–83. http://dx.doi.org/10.21273/hortsci.45.4.679.

Full text

Abstract:

Improved propagation methods greatly benefit conservation of rare cycads. Appropriate substrate conditions, especially excellent root aeration, are crucial to successful cultivation of most cycads. Typical cycad substrates include substantial portions of organic materials that will decompose over time, reducing drainage and increasing water retention. In this study, two inorganic substrates, arcillite (Turface® MVP®) and coarse silica sand, and one mixed cycad substrate (with organic and inorganic components) were evaluated for germination and growth of three rare Zamia species: Z. fairchildiana L.D. Gómez, Z. cunaria Dressler & D.W. Stev., and Z. aff. portoricensis Urb. over a period of 14 months from seed sowing. Substrate type affected leaves per seedling and leaf length. These factors also varied by species as did taproot length and germination rate. There were also significant interactions between substrate and species for caudex diameter and leaf variables, likely reflecting ecological differences among the species, two of which are from rainforest habitats and one from dry forest. All three substrates performed adequately for germination, survival, and growth of Zamia. Turface® and possibly the silica sand likely require additional watering to improve their performance as cycad substrates.

APA, Harvard, Vancouver, ISO, and other styles

39

Murphy, Vickie, Kimberly Moore, M. Patrick Griffith, and Chad Husby. "Improving Conservation through Cultivation: Nine Container Substrates Influence Growth of a Rare Cycad, Zamia pumila L." HortScience 48, no. 9 (September 2013): 1168–72. http://dx.doi.org/10.21273/hortsci.48.9.1168.

Full text

Abstract:

Cycads comprise the most threatened major group of plants on earth and many species require horticultural assistance to ensure their survival. Appropriate container substrate properties, especially relatively high air space content, are crucial to successful cultivation of most cycads from seed. Cycad substrates in common use include substantial portions of organic materials that will decompose over time, reducing aeration. At Montgomery Botanical Center, novel inorganic substrates have improved survival and growth of several very rare and challenging Zamia species, suggesting the need for a rigorous evaluation of different inorganic container substrates. Effects of 1) coarse silica sand (6/20 grade); 2) Fafard (a peat/perlite mix); 3) perlite (expanded volcanic glass); 4) pumice (volcanic rock); 5) Turface (calcined clay); 6) Profile (calcined clay); 7) a 50% sand (6/20): 50% Profile mix; 8) Permatil (calcined slate); or 9) Axis (calcined diatomaceous earth) on growth of Zamia pumila L. seedlings (grown from seed of Dominican Republic provenance) were evaluated. Growth parameters were measured after 18 months. Sand produced significantly higher total dry weight and leaf area than all other substrates. A combination of at least 18% air space combined with little coarse material (sand) or with some coarse material combined with enough smaller particles to fill part of the large pores created by coarse material (Fafard) likely contributed to better growth in these compared with the other seven substrates. The other substrates may have been either too coarse, leading to excessively large pores, which are known to inhibit growth in some plants if the pores are much larger than fine root diameters, or too fine (i.e., too low of an air space percentage). The fine roots of Zamia can be less than 1 mm in diameter, whereas higher proportions of coarse substrate particles over 4 mm in diameter inhibited growth, possibly by creating excessively large pores. In contrast, higher proportions of fine substrate particles of 0.25 to 0.5 mm were beneficial to growth.

APA, Harvard, Vancouver, ISO, and other styles

40

Schutzman, Bart, Andrew P. Vovides, and Russell S. Adam. "Validation of the name Zamia elegantissima Schutzaman, Vovides et Adams." Botanical Sciences, no. 74 (June 2, 2017): 97. http://dx.doi.org/10.17129/botsci.1688.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Stevenson, Dennis Wm, and Sergio Sabato. "TYPIFICATION OF NAMES IN ZAMIA L. AND AULACOPHYLLUM REGEL (ZAMIACEAE)." TAXON 35, no. 1 (February 1986): 134–44. http://dx.doi.org/10.2307/1221051.

Full text

APA, Harvard, Vancouver, ISO, and other styles

42

Mundry, M., and T. Stützel. "Morphogenesis of Male Sporangiophores of Zamia amblyphyllidia D. W. Stev." Plant Biology 5, no. 3 (May 2003): 297–310. http://dx.doi.org/10.1055/s-2003-40791.

Full text

APA, Harvard, Vancouver, ISO, and other styles

43

Calonje, Michael, Dennis Stevenson, Claudia Calonje, Yan Arley Ramos, and Anders Lindstrom. "A new species of Zamia from Chocó, Colombia (Cycadales, Zamiaceae)." Brittonia 62, no. 1 (March 2010): 80–85. http://dx.doi.org/10.1007/s12228-009-9094-8.

Full text

APA, Harvard, Vancouver, ISO, and other styles

44

Schutzman, Bart, Andrew P. Vovides, and Bijan Dehgan. "Two New Species of Zamia (Zamiaceae, Cycadales) from Southern Mexico." Botanical Gazette 149, no. 3 (September 1988): 347–60. http://dx.doi.org/10.1086/337725.

Full text

APA, Harvard, Vancouver, ISO, and other styles

45

Caputo, Paolo, Salvatore Cozzolino, Luciano Gaudio, Aldo Moretti, and Dennis W. Stevenson. "Karyology and phylogeny of some Mesoamerican species of Zamia (Zamiaceae)." American Journal of Botany 83, no. 11 (November 1996): 1513–20. http://dx.doi.org/10.1002/j.1537-2197.1996.tb13944.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

46

Newell, Sandra J. "VARIATION IN LEAFLET MORPHOLOGY AMONG POPULATIONS OF CARIBBEAN CYCADS (ZAMIA)." American Journal of Botany 76, no. 10 (October 1989): 1518–23. http://dx.doi.org/10.1002/j.1537-2197.1989.tb15133.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

47

Clugston, J. A. R., M. P. Griffith, G. J. Kenicer, C. E. Husby, M. A. Calonje, D. W. Stevenson, and D. P. Little. "ZAMIA (ZAMIACEAE) PHENOLOGY IN A PHYLOGENETIC CONTEXT: DOES IN SITU REPRODUCTIVE TIMING CORRELATE WITH ANCESTRY?" Edinburgh Journal of Botany 73, no. 3 (August 8, 2016): 345–70. http://dx.doi.org/10.1017/s096042861600007x.

Full text

Abstract:

The Cycadales are a group of significant global conservation concern and have the highest extinction risk of all seed plants. Understanding the synchronisation of reproductive phenology of Cycadales may be useful for conservation by enabling the targeting of pollen and seed collection from wild populations and identifying the window of fertilisation to aid in the cultivation of Cycadales. Phenological data for 11 species of Zamia were gathered from herbarium specimens. Four phenological characters were coded with monthly character states. DNA was isolated and sequenced for 26S, CAB, NEEDLY, matK and rbcL, and a simultaneous phylogenetic analysis of phenology and DNA sequence data was carried out. Three major clades were recovered: a Caribbean clade, a Central American clade and a South American clade. Eight species showed statistically significant synchronisation in microsporangiate and ovulate phenological phases, indicating the time of fertilisation. Close reproductive synchronisation was consistently observed throughout the Caribbean clade (statistically significant in four of five species) but was less consistent in the Central American clade (statistically significant in one of two species) and South American clade (statistically significant in three of four species). Ultimately, phenology is shown to be a potential driver of speciation in some clades of Zamia and in others to be a potential barrier to hybridisation.

APA, Harvard, Vancouver, ISO, and other styles

48

Berman, Mary Jane, and Deborah M. Pearsall. "Plants, People, and Culture in the Prehistoric Central Bahamas: A View from the Three Dog Site, an Early Lucayan Settlement on San Salvador Island, Bahamas." Latin American Antiquity 11, no. 3 (September 2000): 219–39. http://dx.doi.org/10.2307/972175.

Full text

Abstract:

AbstractPaleoethnobotanical remains from the Three Dog site (SS-21), an early Lucayan site located on San Salvador, Bahamas, are presented and compared to data from other prehistoric Caribbean sites. Flotation, in situ, and screen recovery (1/16", 1.58 mm) revealed six taxa of fuelwood and charred Sapotaceae seed fragments. Preliminary SEM analysis of six chert microliths revealed possible evidence of the Caribbean aroid, Xanthosoma sp. (cocoyam, malanga, yautía) or Zamia sp. The presence of Sapotaceae and possibly Xanthosoma sp. or Zamia sp. in the archaeobotanical record can be attributed to a number of alternative explanations. The site"s inhabitants may have transported these plants from their homelands and transplanted them to home gardens. An alternative view is that they exploited or managed wild representatives or created disturbed habitats that encouraged the spread of wild or cultivated forms. The pollen data from two Bahama cores, one from Andros, the other from San Salvador, reflect anthropogenic disturbance during the prehistoric occupational sequence. The increasing frequency of Sapotaceae pollen in the San Salvador sequence is consistent with the occurrence of Sapotaceae at the Three Dog site. Finally, preservation- and recovery-related issues are discussed. The study suggests that multiple means of data recovery must be employed to gain a more representative picture of prehistoric Caribbean plant use and floristic environment.

APA, Harvard, Vancouver, ISO, and other styles

49

Tomlinson, P. B., T. M. Magellan, and M. P. Griffith. "Root contraction in Cycas and Zamia (Cycadales) determined by gelatinous fibers." American Journal of Botany 101, no. 8 (July 30, 2014): 1275–85. http://dx.doi.org/10.3732/ajb.1400170.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

OLSON, KRYSTLE, and ROOT GORELICK. "Chromosomal fission accounts for small-scale radiations in Zamia (Zamiaceae; Cycadales)." Botanical Journal of the Linnean Society 165, no. 2 (January 10, 2011): 168–85. http://dx.doi.org/10.1111/j.1095-8339.2010.01102.x.

Full text

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!