Effects of moist chilling, gibberellic acid, and scarification on seed dormancy in the rare endemic Pedicularis olympica (Scrophulariaceae)

KIRMIZI S., GÜLERYÜZ G., Arslan H., Sakar F. S.

TURKISH JOURNAL OF BOTANY, cilt.34, sa.3, ss.225-232, 2010 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 34 Sayı: 3
  • Basım Tarihi: 2010
  • Doi Numarası: 10.3906/bot-0912-287
  • Dergi Adı: TURKISH JOURNAL OF BOTANY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, TR DİZİN (ULAKBİM)
  • Sayfa Sayıları: ss.225-232
  • Anahtar Kelimeler: Seed dormancy, Pedicularis olympica, endemic, stratification, gibberellic acid, scarification, GERMINATION CHARACTERISTICS, TEMPERATURE, ECOLOGY, CONSERVATION, STRATEGIES, RELEASE, WETLAND, YUNNAN, PLANTS, CHINA
  • Bursa Uludağ Üniversitesi Adresli: Evet

Özet

We investigated the germination requirements of a rare endemic plant species, Pedicularis olympica Boiss. (Scrophulariaceae), which grows in wet habitats on Uludag Mountain, Turkey. We studied the effects of scarification, moist chilling (+4 degrees C) for 15 days, different doses of gibberellic acid (GA(3); 100, 150, and 250 ppm) and combined hormone and moist chilling treatments under dark (20 degrees C) and photoperiod (20/10 degrees C; 12/12 h, respectively) conditions. GA(3) was able to break dormancy. The highest germination rate was found in the seeds treated with 250 ppm GA(3); 64% of these seeds germinated when treated with moist chilling and incubated in the dark, while 75% germinated under photoperiod conditions. Moreover, mean germination times were significantly lower in the seeds treated with 250 ppm GA(3). Significant differences in final germination percentages and mean germination times were found only for treatments under photoperiod conditions. Scarification also permitted germination; the highest germination rate (78%) was found with 15 min of scarification. Dormancy was not broken by moist chilling for up to 90 days. The germination requirements of dormant P. olympica seeds are found to be consistent with characteristics of its habitat. This can be considered an ecological advantage for the species establishment and persistence.