TitleThe influence of short-term cold stress on the metabolism of non-structural carbohydrates in polar grasses
Journal titlePolish Polar Research
KeywordsAntarctic ; Arctic ; carbohydrates ; cold stress ; enzymes ; Poaceae ; polar plants
Divisions of PASNauki o Ziemi
AbstractPlants adapt to extremely low temperatures in polar regions by maximizing their photosynthetic efficiency and accumulating cryoprotective and osmoprotective compounds. Flowering plants of the family Poaceae growing in the Arctic and in the Antarctic were investigated. Their responses to cold stress were analyzed under laboratory conditions. Samples were collected after 24 h and 48 h of cold treatment. Quantitative and qualitative changes of sugars are found among different species, but they can differ within a genus of the family Poaceae. The values of the investigated parameters in Poa annua differed considerably depending to the biogeographic origin of plants. At the beginning of the experiment, Antarctic plants were acclimatized in greenhouse characterized by significantly higher content of sugars, including storage reserves, sucrose and starch, but lower total protein content. After 24 h of exposure to cold stress, much smaller changes in the examined parameters were noted in Antarctic plants than in locally grown specimens. Total sugar content and sucrose, starch and glucose levels were nearly constant in P. annua, but they varied significantly. Those changes are responsible for the high adaptability of P. annua to survive and develop in highly unsupportive environments and colonize new regions.
PublisherPolish Academy of Sciences ; Committee on Polar Research
TypeArtykuły / Articles
IdentifierISSN 0138-0338 ; eISSN 2081-8262
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