Deschampsia antarctica inhabits the maritime territory of antarctica and south patagonia. This vascular plant grows in favourable locations along the west coast of the antarctic peninsula john et al. Protective effect of the aqueous extract of deschampsia. Pdf waterlogging induced oxidative stress and the mortality. Antarctic moss carpets facilitate growth of deschampsia antarctica. Pdf deschampsia antarctica poaceae the only native grass.
Pdf an extract from the plant deschampsia antarctica. It is arguably the worlds last great wilderness, providing travelers with a unique opportunity to experience genuine pristine wildness. Background and aims the leaf anatomy and ultrastructure of deschampsia antarctica. Ijms free fulltext extract of deschampsia antarctica. A tricin derivative from deschampsia antarctica desv. And it is arguably threatened due to climate change, providing an urgent mission. Endophytic fungi associated with the antarctic grass deschampsia. We investigated whether positive interactions are pre dominant at the shetland islands and the west coast of the. All structured data from the file and property namespaces is available under the creative commons cc0 license. Research of natural substances that can delay skin aging has been the object of increasing interest in the last few years 4, 25, 26. Isoliquiritigenincomplexed chalcone isomerase s189a from the antarctic vascular plant deschampsia antarctica dachi1. Deschampsia antarctica da is an antarctic plant able to live under highsolar irradiation, highsalinity and highoxygen concentrations, low temperature, and extreme dryness. Type i chis use naringenin chalcone as a substrate and are found in most of plants besides legumes, whereas type ii chis in leguminous plants can also utilize. Colonization and demographic structure of deschampsia antarctica and colobanthus quitensis along an altitudinal gradient on.
An extract from the plant deschampsia antarctica protects. The survival of this species in low freezing temperatures and under high levels of uvb radiation may constitute some of the most remarkable adaptive plant responses and suggests that this plant possesses genes associated with cold and uv tolerance. A revision of deschampsia, avenella, and vahlodea poaceae, poeae, airinae in south america. Characterization of rhizospheric bacteria isolated. Deschampsia antarctica, the antarctic hair grass, is one of two flowering plants native to. Deschampsia antarctica is one of the two species of angiosperms that have colonized the maritime antarctic smith, 2003. Waterlogging induced oxidative stress and the mortality of the antarctic plant, deschampsia antarctica article pdf available in journal of ecology and environment 431 december 2019 with 44. Anatomical features and ultrastructure of deschampsia antarctica. Download fulltext pdf download fulltext pdf carbohydrates in colobanthus quitensis and deschampsia antarctica article pdf available september 2005 with 118 reads.
Expressed sequence tag analysis of antarctic hairgrass deschampsia antarctica from king george island, antarctica. Populations of antarctic hairgrass deschampsia antarctica show. Poaceae type ii galactinol synthase 2 from antarctic. Dec 29, 2010 comparative analysis of the sequence of the its12 rdna region of deschampsia antarctica showed that plants of this species with different genotypes may have migrated into antarctica after the glacial period. Formation, structure, and representation in moss polsters of pollen grains of colobanthus quitensis kunth bartl. Plants profile for deschampsia danthonioides annual hairgrass. Deschampsia antarctica edafence, eda, a natural aqueous extract, has shown keratinocyte and fibroblast cell protection effects against ultraviolet radiation and dioxin toxicity. Files are available under licenses specified on their description page. Pollen of the antarctic plants colobanthus quitensis and. In this work, we have characterized the endophytic fungi associated with the leaves of d.
We also determined the percentage of fruiting and dying hairgrass, where each root tuft was taken as an individual plant of d. Chis have been classified into two types based on their substrate specificity. Deschampsia antarctica antarctic hair grass is one of two flowering plants native to antarctica, the other being colobanthus quitensis antarctic pearlwort they mainly occur on the south orkney islands, the south shetland islands and along the western antarctic peninsula. In fact, most of what is known about antarctica has been discovered in the present century. Pdf the taxonomical position of deschampsia antarctica desv,the only. Leaf anatomy of deschampsia antarctica poaceae from the. The record derives from wcsp data supplied on 20120323 which reports it as an accepted name record 407539 with original publication details.
Deschampsia antarctica, the antarctic hair grass, is one of two flowering plants native to antarctica, the other being colobanthus quitensis antarctic pearlwort they mainly occur on the south orkney islands, the south shetland islands, and along the western antarctic peninsula. Deschampsia antarctica wikipedia, a enciclopedia livre. The board of trustees of the royal botanic gardens, kew. In this work, we investigated whether an aqueous extract of the plant eda retains some of its defensive properties and is able to protect our skin against common external oxidants. Deschampsia in world checklist of selected plant families. Antarctica is a place of extraordinary natural beauty that calls to many travelers. Us20110177178a1 extracts of deschampsia antarctica desv. Munro show all show tabs annual hairgrass general information. Pdf on oct 2, 2002, adam barcikowski and others published response. Crystal structure and enzymatic properties of chalcone. Plants and soil microbes respond to recent warming on the. The use of rapd markers allowed the identification of differences at the level of polymorphisms between populations of d. Populationgenetic analysis of deschampsia antarctica from.
Apr 23, 2008 read characterization of rhizospheric bacteria isolated from deschampsia antarctica desv. Poaceae rep resents one of the two vascular plants that have colonized the antarctic continent, which is usually. The antarctic plant deschampsia antarctica da is able to survive in extreme conditions thanks to its special mechanism of protection against environmental aggressions. Pdf the plastid genome of deschampsia cespitosa poaceae. Foi descrita por etienneemile desvaux e publicado em flora chilena 6. It is very likely that the survival of this species is due to the expression of genes that enable it to tolerate high levels of oxidative stress. Antarctica, argentina northwest, argentina south, chile central, chile south, crozet is. Only two flowering plants are found on the entire continent, which occur on the western antarctic peninsular the antarctic hair grass, deschampsia antarctica pictured and the antarctic pearlwort colobanthus quitensis. Deschampsia antarctica, one of only 2 flowering plants found. Antarctica history is rich in adventure and science, yet human activity in the region extends back in time only about 200 years.
In this regard, deschampsia antarctica da is an antarctic plant able to live under highsolar irradiation, highsalinity and highoxygen concentrations, low temperature, and extreme dryness. Wildscreens arkive project was launched in 2003 and grew to become the worlds biggest encyclopaedia of life on earth. It grows under very harsh environmental conditions. The plastid genome of deschampsia cespitosa poaceae. Inhibits colorectal carcinoma growth and liver metastasis through the induction of a specific immune response. Populations of the only two flowering plants native to the antarctic have recently increased in number and size possibly due to climate warming. Samples were collected from antarctica and maintained in vitro culture during 2 years.
The structure of the anther and pollen grain was investigated in an antarctic plant deschampsia antarctica desv. Deschampsia antarctica in world checklist of selected plant families. Pdf a tricin derivative from deschampsia antarctica desv. Cambridge core antarctic science volume 28 issue 6.
Less than 1% of antarctica is available for colonisation by plants. Annual temperatures on the antarctic peninsula, one of the most rapidly warming regions on earth, have risen by up to 0. With the help of over 7,000 of the worlds best wildlife filmmakers and photographers, conservationists and scientists, featured multimedia factfiles for more than 16,000 endangered species. Cloning and constitutive expression of deschampsia antarctica. This page was last edited on 12 october 2015, at 22. Mar 31, 2017 deschampsia antarctica antarctic hair grass is one of two flowering plants native to antarctica, the other being colobanthus quitensis antarctic pearlwort.
Oct 12, 2009 deschampsia antarctica shows tolerance to extreme environmental factors such as low temperature, high light intensity and an increasing uv radiation as result of the antarctic ozone layer thinning. Some of the da defensive properties have been reported in vivo in human cells, and an extract from the. Pdf response patterns of antarctic vascular plants deschampsia. Response patterns of antarctic vascular plants deschampsia antarctica and colobanthus quitensis in time and environmental gradient. Deschampsia antarctica is a polyextremophile gramineae capable of thriving under extreme environmental conditions. Colonization and demographic structure of deschampsia antarctica. Habitat and leaf cytogenetic characteristics of deschampsia. Results of monitoring annual pollen influx on the king george island, antarctica. Deschampsia antarctica is a poaceae grass that has adapted to and colonized antarctica.
Antioxidant responses induced by uvb radiation in deschampsia. Deschampsia antarctica is the only grass naturally occurring in antarctica, and it is also. Evidence for plant viruses in the region of argentina islands, antarctica. Endophytic fungi were recovered from 91 individual plants from different points of admiralty bay. The antarctic hair grass is one of the two native vascular plants growing in antarctica. Distribution and reproductive capacity of deschampsia antarctica. Pollen of the antarctic plants colobanthus quitensis and deschampsia antarctica and its representation in moss polsters. Molecular cytogenetic analysis of deschampsia antarctica desv. Poaceae represents one of the two vascular plants that have colonized the antarctic continent, which is usually exposed to extreme environmental conditions.
The pdf file you selected should load here if your web browser has a pdf reader plugin installed for example, a recent version of adobe acrobat reader if you would like more information about how to print, save, and work with pdfs, highwire press provides a helpful frequently asked questions about pdfs. Specific ultrastructure of the leaf mesophyll cells of. Terrestrial and marine organisms have shown changes in populations and distributions over this time 2, 3, suggesting that the ecology of the antarctic peninsula is changing rapidly. Chalcone isomerase chi is an important enzyme for flavonoid biosynthesis that catalyzes the intramolecular cyclization of chalcones into sflavanones. In this regard, we studied the protective capacity of eda against the deleterious effects of artificial blue light irradiation in human dermal fibroblasts hdf. Reporting the distribution of deschampsia antarctica and colobanthus quitensis on byers peninsula livingston island, south shetland islands, our results. Its aqueous extract eda exhibits anti photoaging in human skin cells, such as inhibition of mmps, directly associated with extrinsic aging. This page was last edited on 3 september 2017, at 07.463 417 530 1391 103 1356 563 1183 1000 1512 1183 271 486 1492 1580 834 1180 306 303 441 1410 1141 758 1278 1116 50 2 1260 426 478 641 1177 795 904 1344 149 831 986 73 620 311 664 106 1320 1388