Farklı Tohum Ekim Yöntemlerinin Orman Gülü (Rhododendron ssp.) Tohumlarının Çıkışları ve Fide Gelişimi Üzerine Etkileri

Pallas, R. simirnovii Trautv ve R. ungernii Trautv) tohumlarınına uygulanan farklı tohum ekim yöntemlerinin çıkış süresi, fide çıkış sıklıkları ve bitki büyümesine olan etkilerini belirlemek amacıyla yürütülmüştür. Ekim yöntemi olarak, elle sıraya ekme (kontrol), plant agar ile karıştırma, MS ile karıştırma ve dere kumu ile karıştırma olmak üzere dört farklı tohum ekim yöntemi denenmiştir. Araştırmamız sonucunda, en yüksek tohum çıkışı oranları R. ponticum türünde %76, R. luteum % 66.6, R. smirnovii %55.33, R. ungernii %24 ve R. caucasicum %15.33 olarak elle sıraya ekme (kontrol) uygulamasından elde edilmiştir. Benzer şekilde, homojen fide sıklığı bakımından da ideal tohum dağılımına en yakın değerler elle sıraya ekme yönteminden elde edilmiştir. Fide boylarında en iyi sonuç R. ponticum (2.11 cm), R. luteum (3.08 cm), R. smirnovii (4.07 cm), R. ungernii (1.39 cm) türlerinde MS ortamından alınmışken, R. caucasicum türünde tohum ekim yönteminin fide gelişimi üzerine etkisi olmamıştır. Sonuç olarak orman gülü türlerinin generatif yöntemle çoğaltılmasında fide çıkış sıklıklarının homejen olarak dağılması için elle kontrollü bir şekilde ekim yönteminin en iyi sonucu verdiği halde, MS ile karıştırarak yapılan tohum ekim yönteminin tüm Rhododendron türlerinde fide gelişimini dikkat çekici bir oranda arttırdığı belirlenmiştir.

Anahtar Kelimeler:

Agar, MS, Kum, Tohum, Ekim ortamı

Effects of seed sowing methods on emergence and seedling growth of some Rhododendron species

This study was conducted to determine the effects of different seed sowing methods on emergence rate, densities of seedling emergence and seedling growth of five Rhododendron species (Rhododednron ponticum L., R. luteum Sweet, R. caucasicum Pallas, R. simirnowii Trautv and R. ungernii Trautv). Four different sowing methods were tested, namely manual sowing in row (control), mixing with plant agar, mixing with Murashige and Skoog Basal medium (MS) and mixing with stream sand. The highest seed emergence rates were obtained by manual sowing in row (control) with R. ponticum species (76%) followed by R. luteum (66.6%), R. smirnowii (55.33%), R. ungernii (24%) and R. caucasicum (15.33%), respectively. Similarly, the values closest to ideal seed distribution for homogenous seedling density were obtained by hand-sowing in row method. The highest seedling height was obtained in MS medium with R. ponticum (2.11 cm), followed by R. luteum (3.08 cm), R. smirnowii (4.07 cm), and R. ungernii (1.39 cm), while the effect of seeding method on seedling growth of R. caucasicum species was not significant. To conclude, the best homogeneous distribution of seedling emergence densities of Rhododendron species was obtained by controlled manual seeding method. However, the seed sowing with MS mixing increased significantly seedling growth in all Rhododendron species.

Keywords:

Agar, MS, Sand, Seed, Sowing medium,

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