Title Genetic and epigenetic studies on populations of Deschampsia antarctica Desv. from contrasting environments on King George Island
Author Chwedorzewska, K.J.; Bednarek, P.T.
Author Affil Chwedorzewska, K.J., Polska Akademia Nauk, Zaklad Biologii Antarktyki, Warsaw, Poland. Other: Instytut Hodowli i Aklimatyzacji Roslin, Poland
Source Polish Polar Research, 32(1), p.15-26. Publisher: Panstwowe Wydawnictwo Naukowe, Warsaw, Poland. ISSN: 0138- 0338
Publication Date 2011
Notes In English. 43 refs. GeoRef Acc. No: 308809. CRREL Acc. No: 65006265
Index Terms ecology; plant ecology; statistical analysis; variations; Antarctica--King George Island; adaptation; Angiospermae; Antarctica; Deschampia antarctica; DNA; epigenetics; genes; genetics; Gramineae; King George Island; Monocotyledoneae; Plantae; populations; Scotia Sea Islands; South Shetland Islands; Spermatophyta
Abstract Populations of Antarctic hairgrass Deschampsia antarctica Desv. from King George Island exhibit variation in many traits. The reason for that is not evident and could be addressed to variable environmental conditions. Obviously, phenotypic variation could be due to stable or temporal changes in expression pattern as the result of adaptation. Stable changes could be due to mutations or site DNA methylation variation that modified expression pattern. Recently, MetAFLP approach was proposed to study such effects. A variant of methylation sensitive AFLP (Amplified Fragment Length Polymorphism), based on the isoschizomeric combinations Acc65I/MseI and KpnI/MseI was applied to analyze the sequence and site DNA methylation differences between two D. antarctica populations exhibiting morphological dissimilarities. Both DNA sequence mutations and site methylation pattern alternations were detected among and within analyzed populations. It is assumed that such changes might have originated as the response to environmental conditions that induced site methylation alternations leading to phenotypic variation of D. antarctica populations from South Shetland Islands.
URL http://hdl.handle.net/10.2478/v10183-011-0005-9
Publication Type journal article
Record ID 91267