The effect of salt (NaCl) stress on early seedling stage and germination of some silage sorghum (Sorghum bicolor) varieties

Yıl 2012, Cilt: 25 Sayı: 1, 47 - 52, 01.06.2012

K. Aydınşakir C. Erdurmuş D. Büyüktaş S. Çakmakcı

Öz

This research was carried out to determine the effects of different NaCl concentrations (0, 2, 4, 6, 8 and 10 dS m-1) on the early seedlings growth and germination of some silage sorghum (Sorghum bicolor L.) varieties (Early Sumac, Leoti, Nes and Rox). Seeds of silage sorghum varieties, 10 seeds per dishe were placed in petri dishes having a diameter of 9 cm and treated with different concentrations of NaCl solutions at 0 (control), 2, 4, 6, 8 ve 10 dS m-1. Germination rates, root and shoot lengths, root and shoot dry weights were measured and analyzed 15 days after placing of seeds in the petri dishes. The results showed that germination and early seedling growth characteristics responses of varieties to NaCl salinity significantly varied. In all varieties used in experiment, increasing NaCl concentration resulted in decreasing germination rates and values of early seedling growth characteristics. Early Sumac was found to be the most resistant variety to salt stress, while Nes was the most tolerant variety during germination and early seedling growth periods.

Anahtar Kelimeler

Sorghum, Salinity, Germination, Seedling growth

Tuz (NaCl) stresinin bazı silajlık sorgum (Sorghum bicolor) çeşitlerinin çimlenme ve erken fide gelişimi üzerine etkileri

Öz

Bu çalışma, farklı NaCl konsantrasyonlarının (0, 2, 4, 6, 8 ve 10 dS m-1) bazı silajlık sorgum
(Sorghum bicolor L.) çeşitlerinin (Early Sumac, Leoti, Nes ve Rox) çimlenme ve erken fide
gelişimi üzerine etkisini belirlemek amacıyla yürütülmüştür. Silajlık sorgum tohumları 9 cm
çapındaki petrilere her bir petride 10 adet tohum olacak şekilde ekilmişler ve tohumlara 0
(kontrol), 2, 4, 6, 8 ve 10 dS m-1 konsantrasyonlarında NaCl uygulanmıştır. Tohum
ekiminden 15 gün sonra çeşitlerin çimlenme oranı, kök ve sürgün uzunluğu ile kök ve sürgün
kuru ağırlığı ölçümleri yapılmıştır. Sonuçlar, çeşitlerin NaCl konsantrasyonlarına farklı
tepkiler verdiğini göstermiştir. Tüm çeşitlerde NaCl konsantrasyonları arttıkça çimlenme
oranı ve erken fide dönemi özellik değerlerinin azaldığı saptanmıştır. Çeşitler arasında
çimlenme ve fide gelişim döneminde tuz stresine toleransı en yüksek çeşit Early Sumac, tuz
stresine en hassas çeşit ise Nes olmuştur.

Anahtar Kelimeler

Sorgum, Tuzluluk, Çimlenme, Fide gelişimi

Kaynakça

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