Biberde (Capsicum annuum L. cv. Oskar F1) Farklı Muhafaza Sürelerinin Verim ve Kalite Özelliklerine Etkisi

Biber, özellikle yüksek C vitamini içeriği ile beslenme açısından önemli bir yere sahip sebzelerdendir. Muhafaza süresince meyve ve sebzelerin kalite özellikleri düşmekte, özellikle yeni çeşitlerde bu kalite özelliklerinin ve bu özelliklerin muhafaza süresince nasıl değiştiğinin belirlenmesi önem arz etmektedir. Bu çalışma Çanakkale Onsekiz Mart Üniversitesi Dardanos Üretim Çiftliğinde 2018 yılı yaz döneminde yetiştirilen Oskar F1 biber çeşidinin kalite ve muhafaza özelliklerinin belirlenmesi amacı ile yapılmıştır. Hasat edilen biberlerde +10 ± 1 °C sıcaklık, %85-90 oransal nem koşullarında 10, 20, 30 gün sonundaki depolama sonrasında renk (L-Parlaklık, a-Kırmızı/yeşil, b-Sarı/mavi, Hue), suda çözünür kuru madde (S.Ç.K.M.), pH, titre edilebilir toplam asitlik (T.E.T.A.), toplam karotenoid miktarı (μg/ml), ağırlık kaybı (%), askorbik asit içeriği (mg/100g), toplam fenolik bileşik miktarı (GAE mg/100 g) parametreleri belirlenmiştir. Çalışma sonucunda muhafazanın ilk 20 gününde L (parlaklık) renk, b (sarı-mavi) renk, karotenoid ve titre edilebilir toplam asitlik değerlerinde istatistiksel anlamda önemli miktarda bir düşüş olmadığı görülmekle birlikte, 30 gün sonunda ürünün kalitesinde düşüş görülse de halen tüketilebilir olduğu belirlenmiştir.

Anahtar Kelimeler:

Biber, Muhafaza, Askorbik asit

New Threat to Lemon Cypress (Cupressus macrocarpa cv. Goldcrest) in Turkey: Seiridium cardinale

Lemon cypress (Cupressus macrocarpa cv. Goldcrest) is a coniferous Cuppressaceae tree and is popular in urban landscapes of Turkey. In July 2021, dark-brown elongated bark lesions and resin exuding cracks with die-back symptoms were observed on the main stem of young C. macrocarpa cv. Goldcrest trees in a private house garden in the central district of Çanakkale Province of Turkey. Fungal isolations made from the margin of cankers of trees consistently yielded flat colonies with dense floccose aerial mycelium that were first off-white and grayish olive-green in some parts or in older cultures. Based on the morphological characteristics of obtained isolates, molecular analyses of the ITS rDNA region of a representative isolate, and pathogenicity tests on 4-year-old C. macrocarpa cv. Goldcrest plants, the causal agent was identified as Seiridium cardinale (Wagener) Sutton & Gibson. This is, to the best of our knowledge, the first report of S. cardinale causing canker on C. macrocarpa in Turkey.

Keywords:

Cupressus macrocarpa, Seiridium cardinale cypress canker, monterey cypress, lemon cypress,

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