Effect of Red LEDs during Healing and Acclimatization Process on the Survival Rate and Quality of Grafted Tomato Seedlings

초록

survival rate and quality of grafted tomato seedlings. Red LEDs and no light (darkness) were used for treatingthree rootstock cultivars, which are ‘B-Blocking’, ‘Kanbarune’, ‘High-power’ in healing room. Results showed thatsurvival rates of grafted seedlings in red LEDs were higher than those in no light treatment. Significant variation onsurvival rates of rootstock cultivars was observed in no light treatment but there was not significant variation in redLEDs treatment. Light treatment also reduced the percentage of infected plants, except for the ‘Kanbarune’ cultivar. Seedling quality in red LEDs was better than that in no light treatment by improving growth parameters such as plantheight, leaf length, leaf width, leaf area, fresh and dry weight of shoot and root. Light treatments and rootstock cultivarsdid not affect number of leaves, leaf chlorophyll value and T/R ratio of seedlings, but seedlings in red LEDswere significantly more compact than those in no light treatment. Moreover, the root morphology of seedlings suchas total root surface area, total root length, and number of toot tips in red LEDs was also greater than that in no lighttreatment.

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