Diaspores of the Introduced Species Poa <i>annua</i> L. in Soil Samples from King George Island (South Shetlands, Antarctica)

Wódkiewicz, Maciej; Galera, Halina; Chwedorzewska, Katarzyna J.; Giełwanowska, Irena; Olech, Maria

doi:10.1657/1938-4246-45.3.415

Cited by 28 publications

(40 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…P. annua has shown a remarkable flowering capacity even under extreme environmental conditions, therefore any attempted eradications of fast-growing plants (r-strategists) must address the likelihood of an extensive seed bank that may persist long after any physical removal of plants (Pertierra et al 2013;Wódkiewicz et al 2013). Under these circumstances pesticide use may be effective, combined with on-going monitoring for plant re-growth at the site.…”

Section: Biology Of the Target Speciesmentioning

confidence: 99%

Biological invasions in terrestrial Antarctica: what is the current status and can we respond?

et al. 2015

View full text Add to dashboard Cite

Section: Biology Of the Target Speciesmentioning

confidence: 99%

Biological invasions in terrestrial Antarctica: what is the current status and can we respond?

et al. 2015

View full text Add to dashboard Cite

“…P. annua was introduced accidentally to the vicinity of Polish Antarctic Station Arctowski over 28 years ago (Olech and Chwedorzewska 2011;Chwedorzewska and Bednarek 2012). The local Antarctic population of this species forms tussocks (Wódkiewicz et al 2013), while in the temperate zone the species is only loosely tufted (Grime et al 1986). P. annua forms a soil seed bank in temperate regions (Lush 1988), as well as in the Antarctic (Wódkiewicz et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Spatial structure of the soil seed bank of Poa annua L.—alien species in the Antarctica

et al. 2014

Self Cite

View full text Add to dashboard Cite

Poa annua L. (annual bluegrass) is the only non-native flowering plant species that has successfully established a breeding population in the maritime Antarctic and has been shown to maintain a soil seed bank. The characteristic of the spatial structure of the Antarctic population of this species is the formation of distinct dense clumps-tussocks. In the temperate zone the species is only loosely tufted. We focused on the characteristics of seed deposition associated with the tussocks and some aspects of the spatial heterogeneity of the soil seed bank of P. annua in the Antarctic. We wanted to assess the microspatial structure of the soil seed bank of annual bluegrass at Arctowski Station. Therefore we compared the number of seeds deposited underneath and in the vicinity of P. annua clumps. Our results indicate that P. annua in the Antarctic maintains a soil seed bank comparable to species typical for the polar tundra. The microspatial structure of P. annua soil seed bank in the Antarctic is highly associated with the presence of tussocks. Seeds are deposited underneath the tussock rather than in the vicinity of the clump. Our results also indicate that seeds are able to survive the Antarctic winter and readily germinate under optimal conditions.

show abstract

“…Two species of flowering plants native to Antarctica and one introduced spe− cies are well represented in the Antarctic soil seed bank (Wódkiewicz et al 2013;Chwedorzewska et al 2014), and they provide additional evidence that longevity and the ability to sustain a permanent soil seed bank are characteristic features of fine seeds. The above hypothesis was also confirmed in the Arctic region where more than 50% of local flora species produce permanent soil seed banks (Cooper et al 2004).…”

Section: Discussionmentioning

confidence: 95%

“…Higher temperatures prolong the growing season, and plants have a more supportive environment for developing germ line cells and for sexual reproduction. Plants produce more viable seeds, some of which enrich soil seed banks (Wódkiewicz et al 2013;Chwedorzewska et al 2014). The number of seedlings and seedling survival rates increase, which gives rise to new localities and contributes to the spread of angiosperms across Antarctica (Lewis−Smith 1994;Day et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Generative reproduction of Antarctic grasses, the native species Deschampsia antarctica Desv. and the alien species Poa annua L.

Giełwanowska¹,

Kellmann−Sopyła²

2015

Polish Polar Research

Self Cite

View full text Add to dashboard Cite

Abstract:The embryology of two species, Deschampsia antarctica, a native species, and Poa annua, an alien species in the Antarctic we studied. Flowering buds of plants growing in their natural habitats on King George Island and generative tissues of both plant species grown in a greenhouse were analyzed. Adaptations to autogamy and anemogamy were ob− served in the flower anatomy of both species. The microsporangia of the evaluated grasses produce a small number of three−celled pollen grains. Numerous pollen grains do not leave the microsporangium and germinate in the thecae. Deschampsia antarctica and P. annua plants harvested in Antarctica developed a particularly small number of microspores in pol− len chambers. In D. antarctica, male gametophytes were produced at a faster rate: genera− tive cells in pollen did not become detached from the wall of the pollen grain, they were not embedded in the cytoplasm of vegetative cells, and they divided into two sperm cells situ− ated close to the wall. The monosporous Polygonum type of embryo sac development was observed in the studied species. The egg apparatus had typical polarization, and the filiform apparatus did not develop in synergids. Large antipodals with polyploidal nuclei were formed in the embryo sacs of D. antarctica and P. annua. Poa annua was characterized by numerous antipodal cells which formed antipodal tissue in the chalazal region of the em− bryo sac. Three distinct antipodals with atypical, lateral position in the vicinity of the egg apparatus were observed in D. antarctica. The diaspores of the investigated grass species were characterized by small size, low weight and species−specific primary and secondary sculpture of the testa and caryopsis coat.

show abstract

Diaspores of the Introduced Species Poa annua L. in Soil Samples from King George Island (South Shetlands, Antarctica)

Abstract: Abstractbank, but also directly in the previous year's inflorescences.

Cited by 28 publications

References 38 publications

Biological invasions in terrestrial Antarctica: what is the current status and can we respond?

Biological invasions in terrestrial Antarctica: what is the current status and can we respond?

Spatial structure of the soil seed bank of Poa annua L.—alien species in the Antarctica

Generative reproduction of Antarctic grasses, the native species Deschampsia antarctica Desv. and the alien species Poa annua L.

Contact Info

Product

Resources

About