Research Institute of Agriculture and Life Sciences1
Department of Plant Science, Seoul National University2
Cucumber and paprika transplants were stored at 9, 12, 15, and 18°C under dark conditions for 15 days and then grown in a greenhouse for 14 days after transplanting. To determine the effects of low storage temperature and long-term continuous darkness on the quality and vigour of transplants, we investigated the quality of transplants during storage and the growth of stored transplants after transplanting. In cucumber transplants, decreasing storage temperature reduced stem elongation and decrease in SPAD value. The quality of cucumber transplants stored at 9°C was well preserved during storage, but they did not survive after transplanting due to chilling damage. Growth and development after transplanting were significantly greater when cucumber transplants were stored at 12°C. In paprika transplants, the quality of transplants did not significantly differ before and after storage. After transplanting, there was no significant difference in the survival rate and growth, but the number of flower buds was greater in the paprika transplants stored at lower temperatures (9 and 12°C). These results indicate that the responses of transplants to the conditions of low temperature and darkness differed between cucumber and paprika, and storage temperature in darkness must be controlled carefully considering species-specific responses to reduce quality deterioration during storage and improve the recovery of transplants after transplanting.
1. Ding, M., B. Bie, W. Jiang, Q. Duan, H. Du, and D. Huang. 2011. Physiological advantages of grafted watermelon (Citrullus lanatus) seedlings under low-temperature storage in darkness. HortScience 46:993-996.
2. Hӓllgren, J.E. and G. Ӧquist. 1990. Adaptation to low temperatures, p. 265-293. In: R.G. Alscher and J.R. Cumming (Eds.). Stress responses in plants: Adaptation and acclimation mechanisms. Wiley-Liss, New York, US.
3. Heins, R.D., M.P. Kaczperki, T.F. Wallace, N.E. Lange, W.H. Carlson, and J.A. Flore. 1995. Low-temperature storage of bedding plant plugs. Acta Hortic. 396:285-296.
4. Justus, I. and C. Kubota. 2010. Effects of low temperature storage on growth and transplant quality of non-grafted and grafted cantaloupe-type muskmelon seedlings. Sci. Hortic. 125:47-54.
5. Kaczperski, M.P. and A.M. Armitage. 1992. Short-term storage of plug-grown bedding plant seedlings. HortScience 27:798-800.
6. Kubota, C. and M. Kroggel. 2006. Air temperature and illumination during transportation affect quality of mature tomato seedlings. HortScience 41:1640-1644.
7. Kubota, C., N.C. Rajapakse, and R.E. Young. 1997. Carbohydrate status and transplant quality of micropropagated broccoli plantlets stored under different light environments. Postharvest Biol. Technol. 12:165-173.
8. Kubota, C., S. Seiyama, and T. Kozai. 2002. Manipulation of photoperiod and light intensity in low-temperature storage of eggplant plug seedlings. Sci. Hortic. 94:13-20.
9. Ning, W., X.G. Ge, and T.L. Li. 2006. Studies on basic indices of tomato seedling quality decline under simulated storage and shipment conditions. China Veg. 3:12-14.
10. Sato, F., H. Yoshioka, and T. Fujiwara. 1999. Effects of storage temperature on carbohydrate content and seedling quality of cabbage plug seedlings. Environ. Contr. Biol. 37:249-255.
11. Sato, F., H. Yoshioka, T. Fujiwara, H. Higashio, A. Uragami, and S. Tokuda. 2004. Physiological responses of cabbage plug seedlings to water stress during low-temperature storage in darkness. Sci. Hortic. 101:349-357.
12. Toivonen, P.M.A. and M. Sweeney. 1998. Differences in chlorophyll loss at 13°C for two broccoli (Brassica oleracea L.) cultivars associated with antioxidant enzyme activities. J. Agric. Food Chem. 46:20-24.