Salt tolerance and proline accumulation of potato (Solanum tuberosum L.) in vitro plants to NaCl treatment

In order to compare salt tolerance among potato cultivars (Solanum tuberosum L.), in vitro plants of each cultivar were cultured on the Murashige and Skoog¡¯s medium containing different levels of NaCl (0, 75, 150, and 225 mM). The suitable level of NaCl for a comparison of the shoot and root growth between potato cultivars was 75mM. Shoot length and weight were better in Dejima, Superior, Jayoung, and Haryeong than in other cultivars such as Goun and Atlantic. Normal root growth was observed in Seohong, Superior, and Haryeong, while Goun, Atlantic, Dejima, Jowon, and Chuback showed no root. Proline contents in all the cultivars increased as affected by NaCl levels, then the increase amount was fewer in the cultivars showed a better growth in both shoot and root than in others showed a poor growth. As a result of this study, Superior and Haryeong were determined as salt tolerant cultivars and therefore using these cultivars it would be possible to potato production at salt arable land such as reclaimed tidal.