ÖZLEM ARAS AŞCI, Hikmet DEVECİ, Alican ERDEĞER, Kübra Nur ÖZDEMİR, Tunhan DEMİRCİ, NİLGÜN GÖKTÜRK BAYDAR

Brassinosteroid Uygulamalarının Munstead Lavander Çeşidinde Bitki Gelişimi ile Sekonder Metabolit Üretimi Üzerine Etkileri

Bu araştırma steroid yapıda bir büyümeyi düzenleyici olan 24-epibrassinolid (24-eBL)’in Lavandula angustifolia türüne ait “Munstead” lavander çeşidinde bitki gelişimi, uçucu yağ verimi ve bileşenleri ile toplam fenolik madde miktarları üzerine olan etkilerini belirlemek amacıyla gerçekleştirilmiştir. Bu amaçla bitkilere tomurcuklanma başlangıcında ve ilk uygulamadan 10 gün sonra olmak üzere iki kez 4 farklı konsantrasyonda (0, 0,75, 1,50 ve 2,25 mg/l) 24-eBL uygulanmıştır. Tam çiçeklenme döneminde hasat edilen bitkiler, taze ve kuru saplı çiçek verimi, kuru sapsız çiçek verimi, toplam fenolik madde miktarı ile uçucu yağ verimi ve bileşenleri bakımından değerlendirilmişlerdir. Araştırma sonucunda 0,75 ve 1,50 mg/l konsantrasyonlarında uygulanan 24-eBL’nin sapsız kuru çiçek verimi, toplam fenolik madde miktarı ile bitki başına uçucu yağ verimini önemli ölçüde artırdığı belirlenmiştir. 24-eBL uygulamalarının uçucu yağ kompozisyonunu da değiştirdiğinin belirlendiği araştırmada, lavanderde 24- eBL uygulamasının kuru çiçek verimi ile uçucu yağ ve fenolik madde miktarını artırmak için kullanılabilecek bir uygulama olduğu tespit edilmiştir.

The Effects of Brassinosteroid Applications on Growth and Secondary Metabolite Production in Lavandula Angustifolia ‘Munstead’

This study was aimed to determine the effects of 24-eBL, a steroid growth regulator, on the plant growth, total phenolic content, essential oil content and composition in “Munstead” lavender cultivar belonging to Lavandula angustifolia. For this aim, 24-eBL was applied to plants at four different concentrations (0, 0.75, 1.50 and 2.25 mg/l) twice, at the beginning of budding and 10 days after the first application. The plants harvested during the full bloom period were evaluated for fresh and dry stemmed flower yields, stemless dry flower yield, total phenolic content and essential oil yield and composition. As a result of the study, 24-eBL at concentrations of 0.75 and 1.50 mg/l significantly increased the stemless dry flower yield, total phenolic content and essential oil yield per plant. 24-eBL applications also changed essential oil composition. To conclude, 24-eBL applications can be used to increase the dry flower yield, phenolic and essential oil contents in lavender plants.

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