| Karyotype and seed protein profile determination of
Agropyron striatulum natural Greek populations M. MOUSTAKAS and H. COUCOLI Department of Botany, University of Thessaloniki, Greece Agropyran striatulum (Elymyus striatulus RUN.) is a diploid littoral species (2n=14), firstly found by RUNEMARK in the Aegean Greek area. It is considered to participate in a closely related group, within the series Junceae, which includes also A. rechingeri (2n=28), A. juneceum subsp. mediterraneum (2n=42) and A. diae (2n=56) (HENEEN & RUNEMARK 1962). According to SAKAMOTO'S classification (1973), A. striatulum should be assigned to group III of the Agropyron-Elymets-Sitanion complex. Some members of this group have been extensively studied by CAUDERON (1966) who defined A. striatulum as one of the four old world diploid species included in Elytrigia group. A cytological study performed by HENEEN and RUNEMARK (1972) on the material of their Aegean A. striatulum collection showed chromosomal polymorphism expressed as slight differences in the appearance of satellited chromosomes. The present authors, within a research program being currently in progress (COUCOLI & SYMEONIDIS 1980, TSEKOS et al. 1981) present here a separate cytological and seed protein isoelectrofocusing analysis of a particular indigenous A. striatulum material collected recently in several North-Greek littoral zones. By combining karyotypical data with protein profile patterns, a sensitive feature capable of differentiating even between types morphologically and cytologically indistinguishable, this study aims at further delimitating the chromosomal constitution of A. striatulum and checking the stability or polymorphism within and between populations. Totally a number of 23 plants representing 5 pophlations and found morphologically similar were examined, all collected from four littoral North Greek biotopes. |
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