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http://dx.doi.org/10.12791/KSBEC.2015.24.2.051

Effect of Silicate Fertilizer on Growth, Physiology and Abiotic Stress Tolerance of Chinese Cabbage Seedlings  

Vu, Ngoc-Thang (Department of Horticulture, Kangwon National University)
Kim, Si-Hong (Department of Horticulture, Kangwon National University)
Kim, Seung-Yeon (Department of Horticulture, Kangwon National University)
Choi, Ki-Young (College of Agriculture and Life Science, Kangwon National University)
Kim, Il-Seop (Department of Horticulture, Kangwon National University)
Publication Information
Journal of Bio-Environment Control / v.24, no.2, 2015 , pp. 51-56 More about this Journal
Abstract
The objective of this study was to evaluate the effect of silicate fertilizer on growth, physiology and abiotic stress tolerance of Chinese cabbage seedlings. Five silicate concentrations (8, 16, 32, 64, and 128mM) and control (non-treatment) were applied to Chinese cabbage seedlings twice a week. Three weeks after application of silicate treatment, seedlings were used for treating abiotic stresses and were assessed for growth and physiological characteristics. Growth parameters significantly increased in 8, 16, and 32mM treatments except 64 and 128mM. Total root surface area, total root length, and number of root tips increased in 8, 16 and 32mM treatments, but they decreased in treated seedlings with 64 and 128mM of silicate. The highest growth parameters and root morphology were observed in 8mM treatment. As for the effect on the seedling physiology, transpiration rates decreased while stomatal diffusive resistance increased to increasing silicate concentration. The application of silicate reduced the electrical conductivity, heating and chilling injury index at high and low temperatures. Silicate enhanced drought tolerance of Chinese seedlings by delaying the starting time of wilting point. The starting time of wilting point in the control was 3 days after discontinuation of irrigation, while in the 8, 64 and 128mM of silicate treatments were 4 days, and the 16 and 32mM treatments were 5 days. All plants were wilted after 5 days in control without irrigation whereas it showed in 8mM treatment after 6 days, in 16, 32, 64, 128mM treatments after 7 days.
Keywords
growth characteristics; ion leakage; stomatal diffusive resistance; transpiration rate; root morphology;
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