Edit links this page was last edited on 27 may 2019, at 18. We hypothesized that cycads are significant dietary items with no. Browse pictures and read growth cultivation information about dioon species, cycad dioon sonorense supplied by member gardeners in the plantfiles database at daves garden. Tadashi kajita, the phylogeography of the cycad genus dioon zamiaceae clarifies its cenozoic expansion and diversification in the mexican transition. However, its epidermal morphology is still poorly known. Ontogenetic resourceuse strategies in a rare longlived. This sam pling represented 14 of the 15 accepted dioon species calonje et al. Queretaro blue dioon holmgrenii dioon mejiae dioon merolae the golden. Dioon sonorense is a species of cycad native to northern mexico. Dioon species are also very popular with international collectors. The ceremonial use of the threatened espadana cycad dioon merolae, zamiaceae by a community of the central depression of chiapas.
A medium to large cycad, to 5m tall, and 40 cm in diameter. The cycad dioon sonorense zamiaceae has a relatively wide distribution range along a vegetation gradient in northwest mexico. Pdf species definition of dioon sonorense zamiaceae. The plant list includes a further 17 scientific plant names of. Il nome del genere dal greco doppio uovo, che fa riferimento alla coppia di ovuli di cui sono dotate le squame ovulifere, fu coniato dal botanico inglese john lindley. Conservation genetics of an endangered cycad, dioon sonorense.
Dioon is a genus of cycads in the family zamiaceae. Dioon rzedowskii dioon sonorense stangeria eriopus 8. Apr 01, 2011 a dna barcoding study was conducted to determine the optimal combination of loci needed for successful species. Ontogenetic shifts in plantplant interactions in a rare. The impetus was acute need for a better understanding of previously undocumented uses of cycads in this region, and the need to improve cycad conservation strategies using ethnobotanical data. The micromorphology of leaf epidermises is valuable for the study of leaf development and function, as well as the classification of plant species. Cronicon open access ec clinical and experimental anatomy. Their habitats include tropical forests, pineoak forest, and dry hillsides, canyons and coastal dunes. Dec 27, 2017 jose said gutierrezortega, maria magdalena salinasrodriguez, jose f martinez, francisco molinafreaner, miguel angel perezfarrera, andrew p vovides, yu matsuki, yoshihisa suyama, takeshi a ohsawa, yasuyuki watano, tadashi kajita, the phylogeography of the cycad genus dioon zamiaceae clarifies its cenozoic expansion and diversification in the mexican transition zone, annals of. Text is available under the creative commons attributionsharealike license. Genetic diversity through life history of dioon edule. Geographical distribution of dioon sonorense dioon tomasellii. Relative to the overall usage of users who have this installed on their pcs, most are running windows 7 sp1 and windows 10.
Evolutionary and conservation implications jorge gonza. The daz object the one main object, of which each dson file consists, is called daz object and has a fixed structure. Lindley in the 19 th century, but most species were discovered during the late 1970s through the. The endemic species dioon sonorense comprises the northernmost. Dioon sonorense is an extremely rare cycad from mexico, which grows to moderate size and is highly sought after by collectors. Hill to quantify leaf nutrient concentrations of trees with stems up to 5. Species definition of dioon sonorense zamiaceae, cycadales, and.
Frontiers comparison of sample preparation techniques. Junodi editor is a software program developed by roland. On feb 15, 2004, palmbob from acton, ca zone 8b wrote. We studied ontogenetic changes in competitive and facilitative interactions between a rare gymnosperm dioon sonorense, our target species and different plant and abiotic neighbours conspecificcycads. Conservation genetics of an endangered cycad, dioon sonorense zamiaceae. Genetic diversity through life history of dioon edule lindley. Cycads are among the oldest seed plants and even predate the dinosaurs. Plant size influences the leaf nutrient relations of many species, but no cycad species has been studied in this regard.
The plant list includes 20 scientific plant names of species rank for the genus dioon. Does plant size influence leaf elements in an arborescent. The genetic diversity estimated for psbki was relatively lower than the its2 diversity. In sonora dioon sonorense along with dasylirion sp is used for the fabrication of alcohol that has led to the decimation of whole. Does plant size influence leaf elements in an arborescent cycad. Browse dioon sonorense pictures, photos, images, gifs, and videos on photobucket. Ethnobotany of mexican and northern central american cycads. Explained here are the key steps and some tips for applying to the graduate program in the department of environmental and forest biology. The cycad genus dioon zamiaceae was described by j. Download scientific diagram geographical distribution of dioon sonorense 0 dioon tomasellii 0. Itis taxonomy is based on the latest scientific consensus available, and is provided as a general reference source for interested parties. According to a report from the 1992 washington convention on biological diversity, trade with d. Son arbustos dioicos, con tallo cilindrico, usualmente con muchas hojas, y sus peciolos son persistentes o caedizos. The cycad is dioecious, entomophilous and arborescent, reaching up to 5 m high, with an extremely long lifespan, exceeding 2500 years vovides 1990.
The genus dioon occupies an important phylogenetic position as sister to the other zamiaceae. Due to the leaflike character of the sporophylls, it has been suggested that dioon is among the most primitive of cycad genera, warranting placement in a distinct family dehgan and dehgan 1988. There have been few studies comparing different preparation and imaging methods for visualizing the leaf epidermis. However, it is not a legal authority for statutory or. Dioon edule new and old cone, close up of female cone, and leaf detail. It comprised 77 sequences of dioon sonorense, six new sequences of other dioon species, and 31 sequences borrowed from genbank previously analyzed by gonzalez et al. Dioon sonorense is a dioecious understory species, with stems usually.
The sugars fructose, glucose, maltose, and sucrose were quantified in seven tissues of zamia muricata willd. Phylogeography and demographic history of zamia paucijuga. A dioon with twisted leaves and thin, slighly falcate leafltes simple but ending in a sharp spine. Mar 21, 2014 gymnosperms and angiosperms can cooccur within the same habitats but key plant traits are thought to give angiosperms an evolutionary competitive advantage in many ecological settings. We have investigated the phylogeographic structure and demographic history of zamia paucijuga, based on 120 its2 and 117 psbki sequences from populations distributed along the.
Frontiers comparison of sample preparation techniques for. Jul 22, 2014 we have investigated the phylogeographic structure and demographic history of zamia paucijuga, based on 120 its2 and 117 psbki sequences from populations distributed along the entire distribution range of the species. Jose said gutierrezortega, maria magdalena salinasrodriguez, jose f martinez, francisco molinafreaner, miguel angel perezfarrera, andrew p vovides, yu matsuki, yoshihisa suyama, takeshi a ohsawa, yasuyuki watano, tadashi kajita, the phylogeography of the cycad genus dioon zamiaceae clarifies its cenozoic expansion and diversification in the mexican transition zone, annals of. Ethnobotany of mexican and northern central american. All species are arborescent with varying trunk lengths and the stems are protected with persistent petiole bases thus protecting the plants from brush fires. Dioon sonorense produces a crown of numerous silvery bluegreen leaves. Unlocking a high bacterial diversity in the coralloid root. Here, four specimen preparation methods were used to investigate the leaf epidermis morphology of arabidopsis, radish, cucumber. Gymnosperms and angiosperms can cooccur within the same habitats but key plant traits are thought to give angiosperms an evolutionary competitive advantage in many ecological. Dioon edule is the most widely cultivated species in this genus. Rosales y ninos heroes sn, hermosillo, sonora 83000, mexico. Request pdf species definition of dioon sonorense zamiaceae, cycadales, and description of d. We describe the bacterial diversity of the coralloid roots from seven dioon species and their. We have detected 15 its2 and four psbki haplotypes, for a total of 19.
The leaflets of dioon edule taper to a sharp point. We describe the bacterial diversity of the coralloid roots from seven dioon species and their surrounding rhizosphere and soil. Thirtytwo populations among all the 14 species of the genus dioon were covered. This is a hard cycad to find, especially this size. The phylogeography of the cycad genus dioon oxford academic. Cycads are among the few plants that have developed specialized roots to host nitrogenfixing bacteria.
It is recommended to plant it away from footpaths and walkways. Green leaves were sampled in a karst, alkaline habitat in rota and a schist, acid habitat. Based on conclusions of a previous multigene study in representative species of all genera in the cycadales, we tested the dna barcoding performance of seven. Its possible to update the information on pdfedit or report it as discontinued, duplicated or spam. This is a relatively mod sized dioon growing up to 3 high. Discontinued pdf editor pdf formcreation pdf workflow. Pdfedit was added by gyorgyjano in apr 2009 and the latest update was made in nov 2019. A new species in the genus dioon zamiaceae from north. The length of the alignment, excluding the mononucleotide repeat region, was 976 bp. Dioon is an exclusively neotropical continental cycad genus with currently known species and 12 are endemic to mexico with one species known from honduras and possibly nicaragua. Armstrong i n his authors note at the beginning of sounder, william armstrong describes sitting around his familys kitchen table when he was a child and listening to a grayhaired black man. Diversity and genetic structure of the endangered cycad dioon sonorense zamiaceae from sonora, mexico.
1009 1276 483 1306 661 723 761 1376 82 123 1347 5 332 1062 266 537 1635 1084 1299 552 79 1163 282 1558 1463 770 1457 676 933 1027 721 1395 1462 370 1472 23 142 1067 995 198 1062 1018 854 1220