Allozyme variation in the three extant populations of the narrowly endemic cycad Dioon angustifolium Miq. (Zamiaceae) from North-eastern Mexico. (1/9)
BACKGROUND AND AIMS: Dioon angustifolium was considered within D. edule. Recent morphometric and allozyme studies on D. edule have shown that D. angustifolium has originated from geographic isolation and is therefore considered to be a separate species. This cycad is endemic to north-eastern Mexico and is known only from three populations in the Sierra Madre Oriental mountain chain. Its populations are small when compared with its southern relative D. edule. In this study, genetic variation was determined within and between populations of D. angustifolium and the genetic consequences of habitat fragmentation and isolation of populations of this species were assessed. METHODS: Allozyme electrophoresis of 14 presumptive loci was used. The data were analysed with statistical approximations for estimating genetic diversity, structure, gene flow and recent genetic bottlenecks. KEY RESULTS: Means and standard deviations of genetic diversity estimators were: number of alleles per locus (A = 1.67 +/- 0.23), percentage of polymorphic loci (P = 52.4 +/- 23 %) and expected heterozygosity (H(E) = 0.218 +/- 0.093). The genetic variation attributable to differences among populations was 16.7 %. Mean gene flow between paired populations was Nm = 1.55 +/- 0.67, which is similar to that reported for endemic plant species of narrow geographical distribution and species with gravity-dispersed seed. A recent bottleneck is detected in the populations studied. CONCLUSIONS: Dioon angustifolium presents high levels of genetic diversity compared with other cycad species, in spite of small population sizes. The recent bottleneck effect did not effectively reduce the genetic variation to the extent of eliminating these populations. The distribution of D. angustifolium appears to be the result of historical biogeographical effects related to the Pleistocene glaciations. It is recommended that this species be catalogued in the IUCN Red List of Threatened Species and conservation efforts be made to preserve it. (+info)Odor-mediated push-pull pollination in cycads. (2/9)
The reproductive organs of some plants self-heat, release scent, and attract pollinators. The relations among these processes are not well understood, especially in the more ancient, nonflowering gymnosperm lineages. We describe the influence of plant volatiles in an obligate pollination mutualism between an Australian Macrozamia cycad (a gymnosperm with male and female individuals) and its specialist thrips pollinator, Cycadothrips chadwicki. Pollen-laden thrips leave male cycad cones en masse during the daily thermogenic phase, when cone temperatures and volatile emissions increase dramatically and thrips are repelled. As thermogenesis declines, total volatile emissions diminish and cones attract thrips, resulting in pollination of female cones. Behavioral and electrophysiological tests on thrips reveal that variations in b-myrcene and ocimene emissions by male and female cones are sufficient to explain the observed sequential thrips' repellence (push) and attraction (pull). These dynamic interactions represent complex adaptations that enhance the likelihood of pollination and may reflect an intermediate state in the evolution of biotic pollination. (+info)Differential patterns of evolution and distribution of the symbiotic behaviour in nostocacean cyanobacteria. (3/9)
(+info)Host selection of symbiotic cyanobacteria in 31 species of the Australian cycad genus: Macrozamia (Zamiaceae). (4/9)
(+info)Conservation and canalization of gene expression during angiosperm diversification accompany the origin and evolution of the flower. (5/9)
(+info)Nodularin, a cyanobacterial toxin, is synthesized in planta by symbiotic Nostoc sp. (6/9)
(+info)Anatomical basis of variation in mesophyll resistance in eastern Australian sclerophylls: news of a long and winding path. (7/9)
(+info)Zamia (Cycadales: Zamiaceae) on Puerto Rico: asymmetric genetic differentiation and the hypothesis of multiple introductions. (8/9)
(+info)Zamiaceae is a family of cycad plants, also known as coontie palms or sago palms, which are characterized by their thick, starchy trunks and fern-like leaves, and are native to tropical and subtropical regions around the world.
I apologize for any confusion, but "Zamiaceae" is not a medical term. It is a taxonomic category in botany, specifically a family of plants that includes cycads, which are seed plants with a long fossil history that date back to the Mesozoic Era. They are often mistaken for palms or ferns due to their tropical appearance. If you have any questions about medical terminology or concepts, I would be happy to help!
Zamiaceae - Wikipedia
The Cycad Pages: Zamiaceae Flora of North America New York Botanical Garden: Vascular Plant Type Catalog, some Zamiaceae genera ... The Zamiaceae are a family of cycads that are superficially palm or fern-like. They are divided into two subfamilies with eight ... The Zamiaceae, sometimes known as zamiads, are perennial, evergreen, and dioecious. They have subterranean to tall and erect, ... "Zamiaceae Horan". Atlas of Living Australia. (Articles with short description, Short description is different from Wikidata, ...
zamia family (Family Zamiaceae) · iNaturalist
Flora of Zimbabwe: Family page: Zamiaceae
Wikipedia: Zamiaceae. Plants of the World Online: Zamiaceae. Tropicos: Zamiaceae. Home. ,. List of families. ,. Zamiaceae. ... iNaturalist: Zamiaceae. IPNI (International Plant Names Index): Zamiaceae. JSTOR Plant Science: Zamiaceae. Mansfeld World ... Flora of Malawi: Zamiaceae. Flora of Mozambique: Zamiaceae. Flora of Mozambique: cultivated Zamiaceae. Flora of Zambia: ... Zamiaceae. Flora of Zimbabwe: cultivated Zamiaceae. External websites:. African Plants: A Photo Guide (Senckenberg): Zamiaceae ...
Encephalartos altensteinii {Zamiaceae} Eastern Cape Giant Cycad
Family: Zamiaceae Reichb.. *Country of Origin: E. Cape Prov. *Habitat: widespread species in eastern Cape and south-western ... Family: Zamiaceae *SubFamily: Encephalartoideae *Tribe: Encephalarteae *SubTribe: Encephalartinae Flowering Data:. This ... Current Accessions in the Zamiaceae. *Stangeria eriopus. Subfamily Ceratozamieae *Ceratozamia hildae. Subfamily ...
Zamiaceae
Zamia acuminata (Zamiaceae) image 31772 at
Zamia dressleri (Zamiaceae) image 31736 at
EUR-Lex - 32019R1587 - EN - EUR-Lex
Encephalartos humilis | CITES
Western Australian Organism List | Agriculture and Food
The Western Australian Organism List (WAOL) database allows you to search for organisms declared under the Biosecurity and Agriculture Management Act 2007 (BAM Act). It is not a complete list of all organisms in Western Australia or their attributes. Use the database to find the legal status of organisms, control requirements, declared pest species and more.. You can search scientific name, common name, phylum, class, order or family name. ...
BOTANICA SISTEMATICA
Family/Famiglia: Zamiaceae Genera/Generi: 1) Catakidozamia W. Hill 2) Ceratozamia Brongn. 3) Encephalartos Lehm. (1834) 4) ... Family/Famiglia: Zamiaceae Genus/Genere: Zamia L.. Species/Specie: 1) Zamia acuminata Oerst. ex Dyer [W. B. Hemsley, Biol. cent ... Zamiaceae. Kingdom/Regno: Plantae (Plants/Piante). Subkingdom/Sottoregno: Tracheobionta (Vascular plants/Piante vascolari). ...
Specimen Details - The William & Lynda Steere Herbarium
Jean-Pierre Sclavo - Wikispecies
Gymnosperms - Innvista
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Living Collections Research Bibliography - Montgomery Botanical Center
Intraspecific chromosone variation in Zamia (Zamiaceae, Cycadales). Caryologia 44: 1-10. Stevenson, D. 1991. The Zamiaceae in ... Zamiaceae), Plant Biosystems 140:221-228.. de la Torre, J., M. G. Egan, M. Katari, E. D. Brenner, D. W. Stevenson, G. M. ... A Review of Current Knowledge of Zamiaceae, With Emphasis on Zamia From South America. Tropical Conservation Science, 12, p. ... Zamiaceae. Flora of Venezuelean Guayana. Vol. 9: 575-576.. Zona, S. 2006. Cyanogenesis in hearts of palm (Arecaceae). Tropical ...
Microcycas
Carnarvon Gorge, in the spectacular and rugged ranges of Queensland's central highlands
Homeopathy Online Shop - Remedia
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Zamia lecointei - Useful Tropical Plants
Flora of The World - Statistics
Dioon | Sago Palm | Plant Delights Nursery
The genus Dioon contains around a dozen species of cycads in the Zamiaceae family that are native to Mexico and Central America ... The genus Dioon contains around a dozen species of cycads in the Zamiaceae family that are native to Mexico and Central America ... The genus Dioon contains around a dozen species of cycads in the Zamiaceae family that are native to Mexico and Central America ...