ผลของแสงต่อการดูดซึมสังกะสีด้วยจอก (Pistia stratiotes L.) / ชิดชนก จิ๋วพัฒนกุล = Effect of light on zinc absorption by water lettuce (Pistia stratiotes L.) / Chidchanok Jewpattanakul
The objective of this study was to compare the effect of LED (Light Emitting Diode) light of zinc absorption by water lettuce (Pistia stratiotes L.). Plants were treated by 4 types of LED light: red, blue, white and mixed between red and blue. The experiment was divided into 3 treatment, control group without zinc, control group added zinc at the concentration of 5 mg/L, and treatment group added zinc at the concentration of 5 mg/L. There was triplicate for each group and the experiment was done for 1 week. The results showed that the highest zinc accumulation in plants was found in plants treated with red light. The maximum concentration in roots and leaves were 4122.5 ± 314.66 and 986.96 ± 89.67 mg/kg DW, respectively. When the red light was applied, and duration was varied as 6, 8 and 10 hour for day. The results indicated that the highest zinc accumulation in plants was found in plants treated for 6 hour per day. The maximum concentration in roots and leaves were 4064.29 ± 393.29 and 638.60 ± 44.58 mg/kg DW, respectively. The concentration of zinc was varied as 5, 10 and 15 mg/L. The results revealed that the highest zinc accumulation in plants was found in plants grown in the solution at the concentration of 10 mg/L. The maximum concentration in roots and leaves were 5318.75 ± 521.49 and 483.36 ± 13 mg/kg DW, respectively. The density per pot was varied as 2, 4 and 6 plants. The results showed that the highest zinc accumulation in plants was found in plants grown in the density 4 plants per pot. The maximum concentration in roots and leaves were 2429.76 ± 230.29 and 133.01 ± 10.35 mg/kg DW per plant, respectively