Impact of Seed Applications (Priming) of Fatty Acid Composition of Seed and Seed Quality and Its Relations

Yıl 2008, Cilt: 17 Sayı: 1-2, - , 01.06.2008

Gamze Kaya

Öz

The most important factors affecting seed quality are the nutritional status of main plant before harvest, harvest period and the pathogenic effects and mechanical damage during harvest, and post-harvest storage conditions (storage temperature, seed moisture, oxygen). In addition, the seed quality depends on seed purity, vitality, strength, moisture content and genetic characteristics. The seed quality is significantly changed by oil content and fatty acid distribution of seeds. Various pre-sowing seed treatments to minimize germination and emergence problems are referred with different names such as “Priming, seed treatments, pre-sowing treatments”. The viability of the seeds is significantly affected with the seed treatments, and the chemicals used in seed treatment, duration of treatment. In this study, the researches on variation of seed fatty acid composition with seed treatments and seed quality have been evaluated.

Anahtar Kelimeler

Priming; fatty acids; seed quality

Tohum Uygulamaları (Priming)’nın Tohum Yağ Asitleri Kompozisyonuna Etkisi ve Tohum Kalitesi ile İliskisi

Öz

Tohum kalitesini etkileyen en önemli faktörler arasında; hasat öncesi ana bitkinin beslenme durumu, hasat dönemi ve sonrası patojenik etkiler, hasat sırasındaki mekanik zararlanmalar, hasat sonrası ise depolama koşulları (depo sıcaklığı, tohum nemi, oksijen) gelmektedir. Ayrıca tohumun kalitesi saflık, canlılık, güç, nem içeriği ve genetik özelliklerine de bağlıdır. Tohumların yağ içerikleri ve yağ asitleri dağılımına bağlı olarak, tohum kalitesinde önemli değişiklikler olmaktadır. Çimlenme ve çıkış sorunlarını minimuma indirgemek için yapılan çeşitli ekim öncesi uygulamalar “Priming, tohum uygulamaları, ekim öncesi uygulamalar” gibi farklı adlarla anılmaktadır. Tohumların düşük ve yüksek sıcaklık, kuraklık gibi çeşitli stres koşullarına dayanımını artırmak amacıyla “Priming”, “Ön Uygulama” ya da “Tohum uygulamaları” adı verilen çeşitli uygulamalar yapılmaktadır. Ayrıca tohum uygulamaları ve bu uygulamalarda kullanılan kimyasal maddeler ile uygulama sürelerine göre tohumdaki canlılık da önemli derecede etkilenmektedir. Bu çalışmada, tohum uygulamalarıyla tohumun yağ asitleri dağılımındaki değişimler ile tohum kalitesi arasındaki ilişkileri ortaya koymak amacıyla yapılan araştırmalar değerlendirilmiştir.

Anahtar Kelimeler

Tohum uygulamaları; yağ asitleri; tohum kalitesi

Kaynakça

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