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KMID : 1024520210300110957
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Journal of the Environmental Sciences
2021 Volume.30 No. 11 p.957 ~ p.965
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Effects of Salt Treatment on Seed Germination and Plant Growth of Korean Native Apocynum lancifolium Russanov
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Kim Jo-Hoon
Park Ye-Gun
Ann Seoung-Won
Baik Jung-Ae
Park Dong-Jin
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Abstract
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This research was carried out to investigate seed germination and growth of the perennial plant Apocynum lancifolium under different NaCl concentrations, with a view for future cultivation on reclaimed land. Initial characterization revealed that the average length and weight of A. lancifolium seed pods was 133.6 mm and 0.23 g, respectively, and the thousand-grain weight was 0.59 g. Upon examining the effects of light on seed germination, we found germination to be 1.7% higher under light conditions (90%) than under dark conditions (88.3%). In terms of the response to salt stress, we found that 90% of seeds germinated in the 0.00%, 0.25%, and 0.50% salt treatment groups. Although salt treatment up to a concentration of 0.5% was found to have little effect on seed germination, the rate of germination decreased at higher concentrations and was completely inhibited in the 2% treatment. We also established that germination rates were higher in seeds sown in horticultural topsoil than in the coarse sandy soil found in the plant’s natural habitats. Although the growth of A. lancifolium tends to decrease with an increase in salt concentration, we found that the stem thickness, fresh weight, and dry weight of A. lancifolium seedlings subjected to 0.25%?1.0% salt were comparable to those of the control seedling that were not exposed to salt. Furthermore, in contrast to those plants subjected to 2.0% salt, these plants continued to grow and remained viable.
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KEYWORD
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Apocynum lancifolium, Salt concentration, Seed pod, Thousand-seed weight, Halophyte
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