Effects of Sodium Chloride Treatment on Seed Germination and Seedling Growth of Italian Ryegrass Cultivars

Abstract

This study was conducted to evaluate the performance of Italian ryegrass cultivars for salt tolerance under in vitro condition. Italian ryegrass cultivars such as Greenfarm, Florida80, Kowinearly, and Hwasan101 were tested for their tolerance to various sodium chloride levels (0, 50, 150, 250, and 350 mM). The seed germination, growth, and activities of antioxidant enzymes were investigated under salt treatment. Physiological traits such as seed germination percentage, germination period, shoot and root length, and dry weight were suppressed under entire salt stress conditions. The results indicated that the highest germination percentage and shoot and root length were recorded at normal conditions. Increased sodium chloride levels caused a significant reduction in the seed germination and growth rate. Among the four tested cultivars, Italian ryegrass 'Hwasan101' could be considered as salt tolerant owing to its higher germination percentage, better seedling growth and antioxidant activities under salinity stress, whereas Greenfarm cultivar was more sensitive. The selection of Italian ryegrass cultivars for greater tolerance to saline environment would allow greater productivity from large saline lands.

Growth Characteristics and Seed Productivity of Italian Ryegrass (Lolium multiflorum L.) Cultivars under Different Salinity in Saemangeum Reclaimed Tideland

“…0.3% 시 7% 정도 떨어지는 경향이 있었다 (Table4). 이는 파종기인 10월 중순에 강우 일수가 없어 출현이 지연되었 기 때문으로 보이며 더욱 토양 염농도가 더 높은 파종구에서는 토양의 높은 삼투압으로 인해 종자로의 수분 공급이 원 활하지 않아 발아가 되지 않거나 지연되는 것으로 보인다(Lee et al, 2014).…”