A division of GYMNOSPERMS which look like palm trees (ARECACEAE) but are more closely related to PINUS. They have large cones and large pinnate leaves and are sometimes called cycads, a term which may also refer more narrowly to cycadales or CYCAS.

High levels of genetic variability and inbreeding in two Neotropical dioecious palms with contrasting life histories. (1/7)

We characterized the population genetics of two Neotropical dioecious palm species of Chamaedorea with contrasting life strategies from the region that is both the northernmost extent and most species rich of the genus. Chamaedorea tepejilote is a common, wind-pollinated arboreal understory palm. Although most adult plants reproduce each year, only a few individuals produce the majority of flowers and seeds. Chamaedorea elatior, conversely, is an uncommon climbing subcanopy palm with entomophilous flowers (insect-pollinated characteristics). Most of the mature palms do not reproduce in consecutive years and fruiting is episodic. Isozymes with a total of 107 alleles for 27 loci of 17 enzymes from six populations were assessed. For both species, co-occurrence of high levels of genetic variation and homozygosity was observed (C. tepejilote: He: 0.385-0.442, f: 0.431-0.486; C. elatior: He: 0.278-0.342, f: 0.466-0.535). Genetic differentiation of C. elatior was much lower (theta=0.0315) than that for C. tepejilote (theta=0.152). The contrast in differentiation may be influenced by differences in the spatial scale of the genetic neighborhoods of the two species. The simultaneous maintenance of inbreeding and of a large number of alleles within the populations is attributable to the low and variable number of mating pairs. Demographic studies indicate that this pattern could be explained by low reproductive frequency among individuals and over years in C. elatior and by reproductive dominance in C. tepejilote.  (+info)

DNA barcoding in the cycadales: testing the potential of proposed barcoding markers for species identification of cycads. (2/7)

Barcodes are short segments of DNA that can be used to uniquely identify an unknown specimen to species, particularly when diagnostic morphological features are absent. These sequences could offer a new forensic tool in plant and animal conservation-especially for endangered species such as members of the Cycadales. Ideally, barcodes could be used to positively identify illegally obtained material even in cases where diagnostic features have been purposefully removed or to release confiscated organisms into the proper breeding population. In order to be useful, a DNA barcode sequence must not only easily PCR amplify with universal or near-universal reaction conditions and primers, but also contain enough variation to generate unique identifiers at either the species or population levels. Chloroplast regions suggested by the Plant Working Group of the Consortium for the Barcode of Life (CBoL), and two alternatives, the chloroplast psbA-trnH intergenic spacer and the nuclear ribosomal internal transcribed spacer (nrITS), were tested for their utility in generating unique identifiers for members of the Cycadales. Ease of amplification and sequence generation with universal primers and reaction conditions was determined for each of the seven proposed markers. While none of the proposed markers provided unique identifiers for all species tested, nrITS showed the most promise in terms of variability, although sequencing difficulties remain a drawback. We suggest a workflow for DNA barcoding, including database generation and management, which will ultimately be necessary if we are to succeed in establishing a universal DNA barcode for plants.  (+info)

Differential patterns of evolution and distribution of the symbiotic behaviour in nostocacean cyanobacteria. (3/7)

 (+info)

The cycad genotoxin MAM modulates brain cellular pathways involved in neurodegenerative disease and cancer in a DNA damage-linked manner. (4/7)

 (+info)

Recent synchronous radiation of a living fossil. (5/7)

 (+info)

Thrips pollination of Mesozoic gymnosperms. (6/7)

 (+info)

Chloroplast phylogenomics indicates that Ginkgo biloba is sister to cycads. (7/7)

 (+info)

Cycadophyta, also known as cycads, is a division of plants that includes several species of mostly tropical and subtropical gymnosperms. These plants are characterized by a large crown of compound leaves, a stout trunk often undergrown by other plants, and a cone-like reproductive structure. Cycads are considered to be living fossils because they have remained relatively unchanged for millions of years and are thought to resemble some of the earliest seed plants. They are found in scattered locations around the world, particularly in the Americas, Africa, Asia, and the Pacific Islands. Some cycad species are endangered due to habitat loss and overcollection for ornamental purposes.

Part 7. Cycadophyta. Proc. Linn. Soc. NSW. 129, 113-149. 2008 - (with Anderson, H.M. and Fitness, L.A.) Stems with attached ...
Pteridospermophyta und Cycadophyta. I. Cycadales. Palaeontographica Abt. B, 248: 1-85. Popa, M.E., 2000. Aspects of Romanian ...
"Gymnosperm - Pinophyta and Cycadophyta , Britannica". www.britannica.com. Retrieved 2023-03-20. Johnstone, Adam (2001). Biology ...
Classification of the Cycadophyta to the rank of family. Class Cycadopsida Brongniart 1843 Order Cycadales Persoon ex von ... Wikimedia Commons has media related to Cycadophyta. "Palm Trees, Small Palms, Cycads, Bromeliads and tropical plants". Archived ...
They probably fed on plants like Cordaitales or Cycadophyta. With their soft bodies, aphids do not fossilize well, and the ...
Zijlstra, G.; van Konijnenburg-van Cittert, J. H. (2019). "Proposal to conserve the name Otozamites (fossil Cycadophyta: ...
... fossil Cycadophyta: Bennettitales) against Otopteris. Taxon, 68(4), 874-875. (Articles with short description, Short ...
In gymnosperms like Ginkgo biloba and cycadophyta, a haustorial pollen tube forms. The tube simply soaks up nutrients from the ...
Praturlon, A. (1968). "Cycadophyta and Coniferophyta from the Lias of M. Palombo (Marsica, Central Apennines)". Geol. Romana. 7 ...
Ginkgophyta and Cycadophyta have a very ancient divergence dating to the early Carboniferous. The earliest representative of ...
Cycadophyta have 3 celled pollen grains while Ginkgophyta have 4 celled pollen grains. Gnetophyta may have 2 or 3 celled pollen ... In Cycadophyta, Ginkgophyta, Coniferophyta, and some Gnetophyta, the single celled female gametophyte undergoes many cycles of ... in Cycadophyta and Ginkgophyta, the germ cell is mobile due to flagella being present and a direct tube cell path from the ...
Pteropsida Allantodiopsis erosa Cyathea pinnata Onoclea hebridica Osmunda hollicki Saccoloma gardneri Cycadophyta Nageiopsis sp ...
Forests on higher ground north of the floodplain consisted of Pinophyta, Ginkgophyta, Pteridophyta, Cycadophyta. Forest fires ...
... fossil Cycadophyta: Bennettitales) with a conserved type". Taxon. 69 (5): 1122-1123. doi:10.1002/tax.12343. Paleobotany: The ...
Cycadophyta are typically dioecious (seed strobili and pollen strobili are produced on separate plants). The lateral organs of ...
This listing contains taxa of plants in the division Cycadophyta, recorded from South Africa. Cycads /ˈsaɪkædz/ are seed plants ... Cycadophyta (cycads (42)), Lycopodiophyta (Lycophytes(45)), Marchantiophyta (liverworts (376)), Pinophyta (conifers (33)), and ...
It originates from a division of Cycadophyta which encompasses the complete species of cycads. M. concinna is primarily ... Cycadophyta of Australia, Least concern flora of Australia, Taxonomy articles created by Polbot). ...
... belongs to the plant family Cycadaceae, which is part of the division Cycadophyta. The species name "orientis" ...
... is a family within the Bennettitales, an extinct group of seed plants within the Cycadophyta subdivision. ...
True gymnosperms like ginkgos (Ginkgophyta) and cycads (Cycadophyta) would appear slightly after the Devonian in the ...
Cycadophyta, Gnetophyta, and Ginkgophyta: characteristics of early seed plants". Canadian Journal of Botany. 80 (9): 954-961. ...
Cycadophyta, Gnetophyta, and Ginkgophyta: characteristics of early seed plants". Canadian Journal of Botany. 80 (9): 954-961. ... Seed producing vascular plants of the division Cycadophyta recorded from South Africa Lists of flowering plants of South Africa ... Cycadophyta (cycads (42)), Lycopodiophyta (Lycophytes(45)), Marchantiophyta (liverworts (376)), Pinophyta (conifers (32)), and ...
Cycadophyta, Gnetophyta, and Ginkgophyta: characteristics of early seed plants". Canadian Journal of Botany. 80 (9): 954-961. ...
Alternative names and the approximate number of genera and species in each are; Cycadidae (Cycadophyta, cycads 10, 300) ... division Cycadophyta class Cycadae Benson,(1957) who introduced the term Pinales, divided gymnosperms into four classes; ...
The sperm of seed plants are non-motile, except for two older groups of plants, the Cycadophyta and the Ginkgophyta, which have ...
Sperm cells of Pinophyta and Gnetophyta are without flagella, and are carried by the pollen tube, while those of Cycadophyta ...
These continued to dominate throughout the period, but during late Carboniferous, several other groups, Cycadophyta (cycads), ...
Lycopodophyta: One Species Pteridophyta: Sixty-Nine Species Ginkgophyta: Nine Species Cycadophyta: Nine Species Pinophyta: Nine ...
Large tree-like plants with lignified trunks in the Pteridophyta, Arecales, Cycadophyta and Poales such as the tree ferns, ...
The gymnosperms are subdivided into five Divisions, four of which, the Cycadophyta, Ginkgophyta, Gnetophyta, and Pinophyta ( ...
Part 7. Cycadophyta. Proc. Linn. Soc. NSW. 129, 113-149. 2008 - (with Anderson, H.M. and Fitness, L.A.) Stems with attached ...
Division/Divisione: Cycadophyta. Class/Classe: Cycadopsida. Order/Ordine: Cycadales. Family/Famiglia: Zamiaceae Genera/Generi: ... Division/Divisione: Cycadophyta. Class/Classe: Cycadopsida. Order/Ordine: Cycadales. Family/Famiglia: Zamiaceae Genus/Genere: ...
This specimen represents an endangered or threatened species. The specific locality has been removed from the online record to protect this species from over-collection. These data may be supplied to researchers on request.. ...
Cycadophyta and Coniferophyta. Term. Cycadophyte. Definition. phylum for gymnosperms: known as cycads: compound leaves with ...
Division: Cycadophyta *Class: Cycadopsida *SubClass: Cycadidae *Order: Cycadales *SubOrder: *Family: Zamiaceae *SubFamily: ...
Ang mga Halaman (Latin: Plantae, Aleman: Pflanze, Ingles, Olandes: plant, Kastila, Portuges, Italyano: planta) ay isang malaking grupo ng mga nilikhang bagay na may buhay. Binubuo ito ng ibat ibang miyembro tulad ng mga puno, baging, damo at lumot. Ang mga luntiang halaman, na tinatawag rin bilang mga metaphyte, ay kumukuha ng enerhiya mula sa liwanag ng sa pamamagitan ng proseso ng photosynthesis. Ang photosynthesis ay bumubuo ng asukal, ang pangunahing pagkain ng mga halaman, mula sa tubig at carbon dioxide. ...
സസ്യസാമ്രാജ്യത്തിൽ (കിങ്ഡം : പ്ലാന്റേ) ഉൾപ്പെടുന്ന ബഹുകോശ യൂക്കാരിയോട്ടുകളാണ് സസ്യങ്ങൾ(അല്ലെങ്കിൽ ചെടികൾ), ഹരിതസസ്യങ്ങൾ എന്നും അറിയപ്പെടുന്നു. വൃക്ഷങ്ങൾ, ഓഷധികൾ, കുറ്റിച്ചെടികൾ, തൃണങ്ങൾ, വള്ളികൾ, പന്നലുകൾ, പായലുകൾ, ഹരിതനിറമുള്ള ആൽഗകൾ തുടങ്ങിയവ സസ്യസാമ്രാജ്യത്തിൽ ഉൾപ്പെടുന്നു. ബീജസസ്യങ്ങൾ, ബ്രയോഫൈറ്റുകൾ, പന്നൽച്ചെടികൾ, അനുഫേണുകൾ എന്നിങ്ങനെ നിർവചിക്കപ്പെട്ടിരിക്കുന്ന ...
Cycadophyta, Gnetophyta, and Ginkgophyta: characteristics of early seed plants. Canadian Journal of Botany, 80(9), 954-961. ...
Retrieved from University of California Museum of Paleontology website: http://www.ucmp.berkeley.edu/seedplants/cycadophyta/ ...
1. Coniferophyta 2. Cycadophyta. 3. Ginkgophyta 4. Gnetophyta. 56. According to 2014 IUCN Red List, which of the following ...
Cycadophyta Cycads unprocessed seeds Cytisus Broom leaves, twigs, flowers, seeds Return to index ...
Leaflets fromfern (Dryopteris sp., Pteridophyta), horsetail (Equisetum arvense, Equisetophyta), Cycasrevoluta (Cycadophyta), ...
The sperm of seed plants are non motile except for two older groups of plants the Cycadophyta and the Ginkgophyta which have ...
The families and genera of cycads: a molecular phylogenetic analysis of Cycadophyta based on nuclear and plastid DNA. Int. J. ... Iron-rich particles and globoids in embryos of seeds from phyla Coniferophyta, Cycadophyta, Gnetophyta, and Ginkgophyta: ...
Cycadophyta-cycads. *Ginkgophyta-ginkgo. *Gnetophyta-gnetophytes Ephedra. *with seeds and flowers *Anthophyta = angiospersms = ...
These continued to dominate throughout the period, but during late Carboniferous, several other groups, Cycadophyta (cycads), ...
Cycadophyta. Cycadophyta are also known more commonly as cycads. Unlike the Pinus plants, cycads are mostly found in tropical ...
Record 1 to 0 of 5 in the Cycadophyta taxon. Copyright (c) 2003-2023 VIRBOGA. All rights reserved. ...
Chloroplasts probably evolved following an endosymbiotic event between an ancestral, photosynthetic cyanobacterium and an early eukaryotic phagotroph.[16] This event (termed primary endosymbiosis) is at the origin of the red and green algae (including the land plants or Embryophytes which emerged within them)) and the glaucophytes, which together make up the oldest evolutionary lineages of photosynthetic eukaryotes, the Archaeplastida.[17] A secondary endosymbiosis event involving an ancestral red alga and a heterotrophic eukaryote resulted in the evolution and diversification of several other photosynthetic lineages such as Cryptophyta, Haptophyta, Stramenopiles (or Heterokontophyta), and Alveolata.[17] In addition to multicellular brown algae, it is estimated that more than half of all known species of microbial eukaryotes harbor red-alga-derived plastids.[18] Red algae are divided into the Cyanidiophyceae, a class of unicellular and thermoacidophilic extremophiles found in sulphuric hot ...
Cycadophyta. Cycadopsida. Insects. Insecta. Pinnipedia. Caniformia. Theales. Ericales. Tracheobionta. Tracheophyta. Vetiveria. ...
Cycadophyta. Cycadopsida. Insects. Insecta. Pinnipedia. Caniformia. Theales. Ericales. Tracheobionta. Tracheophyta. Vetiveria. ...
Cycadophyta. Cycadopsida. Insects. Insecta. Pinnipedia. Caniformia. Theales. Ericales. Tracheobionta. Tracheophyta. Vetiveria. ...
Cycadophyta. Cycadopsida. Insects. Insecta. Pinnipedia. Caniformia. Theales. Ericales. Tracheobionta. Tracheophyta. Vetiveria. ...
Divisio: Cycadophyta Classis: Cycadopsida Ordo: Cycadales Subordo: Cycadineae Familia: Cycadaceae Genus: Cycas. Species: Cycas ...
Saqovniklər (lat. Cycadopsida) - bitkilər aləminin cycadophyta şöbəsinə aid bitki sinfi. Saqovniklər (sinif). ...
Cycadophyta *Coniferophyta *Magnoliophyta *Ascomycota *Basidiomycota *Porifera *Cnidaria *Platyhelminthes *Nematoda *Annelida * ...
Cycadophyta Cycads 160 [22] Ginkgophyta Ginkgo 1 [23] Pinophyta Conifers 630 [21] ...
And see textA chordate krdet KOR-dayt is a deuterostomic animal belonging to the phylum Chordata krdet kor-DAY-t. All chordates possess at some point
Cycadophyta. This is the mapping for the Wikipedia template Bosca Sonraí Tacsanomaíochta. Find usages of this Wikipedia ...
Division: Cycadophyta * Högre klassificering: Cycas * Bevarandestatus: Minst oro (befolkningsstabil) Encyclopedia of Life ...
  • The sperm of seed plants are non motile except for two older groups of plants the Cycadophyta and the Ginkgophyta which have flagellated sperm. (bionity.com)
  • Cycadophyta and Ginkgophyta. (christianpott.eu)
  • The phyla include Pinophyta ( conifers ), Cycadophyta (cycads), Ginkgophyta (ginkgoes), Gnetophyta (gnetophytes), and Magnoliophyta (flowering plants or angiosperms). (newworldencyclopedia.org)
  • Iron-rich particles and globoids in embryos of seeds from phyla Coniferophyta, Cycadophyta, Gnetophyta, and Ginkgophyta: characteristics of early seed plants. (wikipedia.org)
  • Cycads (division Cycadophyta) are unique plants from remote and primitive ages. (canarius.com)
  • Cycads have to do with the species Cycadophyta and the lineage of Cycadaceae. (xtra.net)
  • Cycadopsida ) - bitkilər aləminin cycadophyta şöbəsinə aid bitki sinfi. (wikipedia.org)
  • Nåletræ-rækken ( Pinophyta ) er en af de 12 rækker i planteriget og en af 10 indenfor de nulevende stængelplanter . (wikipedia.org)
  • Pinophyta indeholder kun en enkelt klasse , Pinopsida, der kun rummer én nulevende orden, Gran-ordenen Pinales. (wikipedia.org)
  • As plantas destes períodos eram dominadas por plantas sem sementes, fetos e cavalinhas (Pteridophyta), e mais tarde por plantas com semente, como as cicas (Cycadophyta). (florestadosaber.pt)
  • När det inte finns några tillgängliga växter kan du beställa frön från en välrenommerad fröleverantör som Garden Paradise Seeds för att säkerställa att fröna kommer att gro. (gardenparadiseseeds.com)
  • cycads ( tribe Cycadophyta) resemble palm trees and grow in tropical climates. (mormonwoman.org)
  • Cycas ) er en slekt innenfor den nakenfrøede konglepalmefamilien ( Cycadacae ) - som inngår som egen klasse og divisjon (Cycadophyta) innenfor de nakenfrøede karplantene . (wikipedia.org)
  • The phyla (or divisions) of the plant kingdom that comprise the gymnosperms are the Cycadophyta (ex. (cropsreview.com)