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Germination Responses to GA3

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Germination Responses to GA

3

and Stratification of Threatened Festuca L. Species from Eastern Mediterranean

Serap C ¸ elikler

*

, Gürcan Güleryüz, and Rahmi Bilalog˘lu

Uludag˘ University, Science and Arts Faculty, Biology Department, Görükle 16059, Nilüfer, Bursa, Turkey. Fax: +90 22 44 42 81 36. E-mail: scelikler@uludag.edu.tr

* Author for correspondence and reprint requests

Z. Naturforsch.61 c, 372Ð376 (2006); received November 29/December 30, 2005

The seed germination characteristics of three threatenedFestucasp. [F. punctoriaSm.,F.

cyllenica Boiss. et Heldr. subsp. uluana Markgr.-Dannenb., F. paphlagonica (St.-Yves) Markgr.-Dannenb. subsp.paphlagonica] were investigated. These species are endemic and spread on alpine belt. The study was carried out with wet-cold and dry-cold stratification throughout 15 days, different doses of GA3(50, 100 and 150 ppm) and hormone-stratification combined treatments, and non-treatment series. We found that the germination rates of three fescue seeds for various treatment series were different. The mean germination percentage ofF. cyllenica was higher (80%) than that ofF. punctoriaand F. paphlagonicawhich were fairly low (50Ð60%). Germination rates increased by wet-stratification treatment inF. punc- toriaand also increased with 100 ppm GA3application to the seeds ofF. paphlagonica.When taken into consideration the germination percentages of all fescue species, the seeds ofF.

punctoriaandF. paphlagonicacan be dormant, but the seeds ofF. cyllenicaare non-dormant.

Key words: Festucasp., Germination, Threatened Species

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