Zobrazeno 1 - 10
of 39
pro vyhledávání: '"R. D. Seppelt"'
Publikováno v:
Oecologia. 113(3)
A lichen growing in a continental Antarctic region with low temperatures and strong irradiance in summer was investigated for evidence of photoinhibition. Field experiments with Umbilicaria aprina from a sheltered site with heavy snowpack showed no e
Autor:
G. Kantvilas, R. D. Seppelt
Publikováno v:
The Lichenologist. 38:109-113
The new species, Polysporina frigida Kantvilas & Seppelt is described and illustrated. It is the first record of this genus from the Antarctic continent.
Autor:
H. U. Ling, R. D. Seppelt
Publikováno v:
Polar Biology. 20:320-324
A new name, Chloromonas hohamii, is proposed to accommodate a common North American snow alga previously incorrectly referred to as Chloromonas polyptera. Chloromonas hohamii differs in having the motile vegetative cells with a cup-shaped chloroplast
Autor:
R. D. Seppelt, O. R. Azmi
Publikováno v:
Polar Biology. 18:128-134
Studies were conducted on microfungi isolated from soils in the Windmill Islands, continental Antarctica. Growth responses of Alternaria alternata, Chrysosporium pannorum, Nectria peziza, Thelebolus microsporus, Mycelia sterile and Phoma cf. herbarum
Autor:
R. D. Seppelt
Publikováno v:
Journal of Bryology. 19:267-277
An amended description of Ditrichum immersum, incorporating details of peristome and spore morphology, is given. Vegetative morphology, peristome features and spore morphology are compared to D. strictum, to which it appears closely related. The unus
Publikováno v:
Plant, Cell and Environment. 18:1395-1402
Freezing and thawing of the endemic moss species Grimmia antarctici Card, caused photoinhibition. When snow cover was removed from moss in the field, resulting in exposure to fluctuating temperatures and light conditions, photoinhibition, measured as
Autor:
A. E. Jackson, R. D. Seppelt
Publikováno v:
Physiologia Plantarum. 94:25-30
Samples of Prasiola crispa were collected in Antarctica throughout a 13-month period and analysed for free amino acids by HPLC. There was a marked increase in the levels of proline with the onset of winter, concurrent with a decrease in the other pre
Publikováno v:
Vegetatio. 111:71-87
The distribution and frequency of bryophyte and lichen vegetation on ice-free regions of the Windmill Islands are presented using data derived from aerial photography and ground surveying. The qualitative and quantitative plant cover of sites are lis
Publikováno v:
Physiologia Plantarum. 90:567-576
In order to ascertain whether the major species of continental antarctic macrolichens are photosynthetically active during summer conditions, the chlorophyll fluorescence of three lichen species [Umbilicarin decussata (Vill. Zahlbr., Pseudephebe minu
Publikováno v:
Physiologia Plantarum. 90:567-576