Brassinosteroid Uygulamalarının ‘Chandler’ Ceviz Çeşidinin Çiçek Cinsiyet Dağılımına Etkisi

Öz

Öz: Araştırmada brassinosteroid (BR) grubu bileşiklerinden 24-epibrassinolid (EBr) ve 22(S), 23(S)-homobrassinolid (HBr)’in çiçek çinsiyet dağılımına etkileri çalışılmıştır. Çalışma Çanakkale Onsekiz Mart Üniversitesi Ziraat Fakültesi Bahçe Bitkileri Bölümü’nde 2016-2018 yılları arasında ‘Chandler’ ceviz (Juglans regia L.) çeşidi üzerinde yürütülmüştür. Çöğür anaç üzerine ‘Chandler’ ceviz çeşidi aşılanarak toprak: torf: perlit (2:1:1) yetiştirme ortamı ile doldurulmuş 70 litrelik saksılarda yetiştirilmiştir. HBr ve EBr 1 mg L-1 konsantrasyonunda birbirini takip eden iki yıl boyunca kış dinlenme ve tomurcukların uyandığı dönemde iki kez el pülverizatörü kullanarak uygulanmıştır. Elde edilen sonuçlar, BR uygulamalarının cevizlerdeki çiçek cinsiyet dağılımını değiştirebileceğini göstermektedir. EBr ve HBr uygulamaları fidan başına dişi, kedicik (erkek) ve toplam çiçek sayısını önemli ölçüde artırmıştır. En fazla dişi çiçek (5.2) HBr uygulanan fidanlarda saptanmıştır. Fidanların yıllık gelişmesi ile dişi çiçek, kedicik ve toplam çiçek sayılarındaki artışın istaistiksel olarak pozitif ilişkili olduğu belirlenmiştir. Kedicik ve dişi çiçekler arasındaki oransal ilişkinin BR uygulamaları ve fidanların gelişiminden bağımsız olduğu görülmektedir.

Anahtar Kelimeler

• Chandler
• çiçek
• Juglans regia
• püskül
• brassinosteroid
• Chandler, çiçek, Juglans regia, püskül, brassinosteroid

Effect of Brassinosteroid Applications on Flower Sex Distribution of 'Chandler' Walnut Cultivar

Abstract

In this study, the effects of brassinosteroid (BR) group compounds, 24-epibrassinolide (EBr) and 22(S), 23(S)-homobrassinolide (HBr), on flower sex distribution were studied. The study was carried out on the 'Chandler' walnut (Juglans regia L.) cultivar between 2016-2018 at the Department of Horticulture Faculty of Agriculture, Çanakkale Onsekiz Mart University. 'Chandler' grafted on a seedling rootstock were planted into 70-liter pots containing soil: peat: perlite (2:1:1) medium. HBr and EBr were applied twice at a concentration of 1 mg L-1 for two consecutive years in the dormant season and at bud burst, using a hand sprayer. The results show that BR applications could alter the flower sex distribution in walnuts. EBr and HBr applications significantly increased the number of females, catkin (male), and total flowers per plant. The highest number of female flowers (5.2) was observed in the plant treated with HBr. It was determined that the annual growth of the plant and the increase in the numbers of the female flower, catkin, and total flowers were statistically positively related. It is seen that the proportional relationship between male and female flowers is independent of BR applications and the growth of the plant.

Keywords

• Chandler
• flower
• Juglans regia
• catkin
• brassinosteroid
• Chandler, flower, Juglans regia, catkin, brassinosteroid

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