Narcissus cv. ‘Ice Follies’ Çiçeğinde Soğandan Uygulanan Giberellin İnhibitörleri ile Bitki Boy Kontrolü

Bu çalışmada Narcissus cv. ‘Ice Follies’ çiçeğinin saksıda yetiştiriciliğinde dikim öncesi soğanlara uygulanan giberellin inhibitörlerinin bitki boyu üzerine olan etkileri incelenmiştir. Narcissus cv. ‘Ice Follies’ soğanları dikim öncesi 0, 10, 20 ppm dozlarında flurprimidol ve 0, 100, 200 ppm dozlarında paclobutrazol çözeltileri ile muamele edilmiştir. Giberellin inhibitörlerinin çiçeklenme zamanı, çiçek ömrü, yaprakların klorofil içeriği, yaprak uzunluğu ve bitki boyu üzerine olan etkileri incelenmiştir. Ayrıca serada saksıda yetiştirilen nergisler satış aşamasına geldikleri dönemde, bitki boyunda meydana gelen değişimleri inceleyebilmek amacıyla, sıcaklığı 20 °C’ de sabit olan laboratuvara alınmıştır. En kısa bitki boyu dikim öncesi soğanlara uygulanan 20 ppm flurprimidol, 200 ppm paclobutrazol ve 10 ppm flurprimidol uygulamalarından elde edilmiştir. Bu uygulamalarda nergislerin bitki boyu 7.11, 7.31ve 7.75 cm ile kontrole kıyasla %52, %51 ve %48 daha kısa olmuştur. Giberellin inhibitörleri bitki boyu yanında yaprak boyunu da kısaltmıştır. Ayrıca flurprimidol ve paclobutrazol uygulamaları nergis yapraklarının birim alandaki klorofil içeriğini de arttırmıştır. En yüksek klorofil içeriği 60.6 CCI ile 20 ppm flurprimidol uygulamasının yapıldığı nergislerden elde edilirken, kontrol bitkilerinin klorofil içeriğinin 40.96 CCI olduğu saptanmıştır. Uygulamaların bitki boyu üzerine olan etkisinin laboratuvar koşullarında da (ev-ofis) devam ettiği belirlenmiş ve en kısa bitki boyu 10.12 cm ile 200 ppm paclobutrazol uygulamasından elde edilmiştir.

Plant Height Control of Narcissus cv. ‘Ice Follies’ by Gibberellin Inhibitors as Bulb Soak

In this study, effect of gibberellin inhibtors as preplant bulb soaks on plant height of Narcissus cv. ‘IceFollies’ grown in pots were investigated. Bulbs of Narcissus cv. ‘Ice Follies’ were soaked in flurprimidol at 0, 10,20 ppm and paclobutrazol at 0, 100, 200 ppm before planting. Effect of gibberellin inhibitors on the time of flowering,flower life, chlorophyll content of leaves, leaf length and plant height were determined. In addition, after narcissuswere grown in pots in the greenhouse arrived at the sales stage to determinate the changes that occur in the plantheight, plants were taken to the laboratory which was temperature held constant at 20 °C. The shortest plant heightwas obtained from the 20 ppm flurprimidol, 200 ppm paclobutrazol and 10 ppm flurprimidol treatment as given bulbsoaks. In this treatments, plant heihgt was 7.11, 7.31, 7.75 cm and were 52%, 51%, 48% shorter than untreatedcontrol. Gibberellin inhibitors also shortened leaf lenght. Flurprimidol and paclobutrazol treatments were resultedhigher chlorophyll content per unit area in the leaves than untreated controls. The highest chlorophyll content wasobtained from the plants were treated 20 ppm flurprimidol with 60.6 CCI, while the control was 40.96 CCI. Theeffects of treatments on plant height has been maintained in lab conditions (home-office). The shortest plant heightwas obtained from 200 paclobutrazol treatment with 10.12 cm during post production period.

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