Centaurea lydia Boiss’in (Asteraceae) Üreme Biyolojisi

Abstract

Asteraceae ailesine ait endemik bir tür olan Centaurea lydia, Türkiye’de dar bir yayılış alanına sahiptir ve IUCN'e göre LR/cd kategorisinde yer almaktadır. Bu çalışma, 2024 yılında İzmir Bornova’daki yangınların tür üzerindeki etkilerini ve üreme biyolojisini incelemiştir. Çiçek morfolojisi, polen canlılığı, stigma alıcılığı, tohum üretim başarısı ve çimlenme oranları gibi faktörler değerlendirilmiştir. Elde edilen sonuçlara göre, tür protandrik bir yapıya sahip olup etkin tozlaşma için böceklere bağımlıdır. Kendine uyumsuz bir tozlaşma sistemi sergileyen türde fertil tohum oranı %40.86 olarak belirlenmiştir. Fertil tohumların fide oluşturma oranının oldukça yüksek olması, türün üreme kapasitesini artıran önemli bir avantajdır. Ancak, yüksek fide başarısına rağmen, İzmir’deki yangınların türün habitatında ciddi kayıplara yol açması, Centaurea lydia popülasyonunun risk altında olduğunu göstermektedir. Bu nedenle, türün mevcut koruma statüsünün "Vulnerable" seviyesine yükseltilmesi gerektiği düşünülmektedir.

Keywords

• Centaurea
• ikincil polen sunumu
• koruma
• üreme

Supporting Institution

Tübitak, Ege Üniversitesi Bilimsel Araştırma Projeleri Koordinatörlüğü

Project Number

TUBITAK 1002-A Project No: 222Z235 and Ege University Scientific Research Projects Coordination Project No: 28463

Reproductive biology of Centaurea lydia Boiss. (Asteraceae)

Abstract

Centaurea lydia, an endemic species belonging to the Asteraceae family, has a limited distribution in Turkey and is currently listed in the LR/cd category by the IUCN. This study, conducted in 2024, examined the impacts of wildfires in Bornova, İzmir, on the species and its reproductive biology. Key factors such as flower morphology, pollen viability, stigma receptivity, seed production success, and germination rates were evaluated. The results showed that the species exhibits protandry and relies on insect pollinators for effective reproduction. It has a self-incompatible pollination system and a fertile seed ratio of 40.86%. The high seedling establishment rate of fertile seeds is a significant advantage that enhances the reproductive capacity of the species. However, despite the high seedling success, the wildfires in İzmir have caused severe habitat loss, placing the Centaurea lydia population at considerable risk. Therefore, it is suggested that the conservation status of the species should be elevated to "Vulnerable".

Keywords

• Centaurea
• secondary pollen presentation
• conservation
• reproduction

Supporting Institution

TUBITAK, Ege University Scientific Research Projects Coordination

Project Number

TUBITAK 1002-A Project No: 222Z235 and Ege University Scientific Research Projects Coordination Project No: 28463

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