Chinese Bulletin of Botany ›› 2016, Vol. 51 ›› Issue (1): 58-67.DOI: 10.11983/CBB14211
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Jia Li, Jinxing Chen, Zhizheng Li*
Online:
2016-01-01
Published:
2016-02-01
Contact:
Li Zhizheng
About author:
These authors contributed equally to this paper
Jia Li, Jinxing Chen, Zhizheng Li. Chemical Changes Caused by LED Lamps in Nutrient Solution and Its Effect on Plant Growth[J]. Chinese Bulletin of Botany, 2016, 51(1): 58-67.
Figure 1 6 different LED devices for root system illumination experiments6 kinds of LED: LED-red, LED-green, LED-yellow, LED- purple, LED-blue, and LED-white
Figure 3 The Fe deficiency symptom and its recovery of rice plants in series experiments of LED illumination to root system in the solution (A) Fe deficiency symptom of rice plants in solution with 1 mg∙L-1 Fe; (B)-(G) The recovery of Fe deficiency symptom of rice plants in solution with 6 mg∙L-1 Fe; The experimental groups were LED-blue, LED-white, LED-purple, LED-green, LED-yellow and LED-red, respectively; Sets in each group, from left to right, was CK3 soil culture, CK2, independent hydroponics, and CK1/LED illuminated in connected hydroponics. (A)-(D) The LED board was in the right pot; (E)-(G) The LED board was in the left pot.
Reaction system (RS) | Ingredients | Compound and source |
---|---|---|
RS1 | 100 mg∙L-1 Fe+100 mg∙L-1 Si | FeEDTA (self-made), K2SiO3·xH2O (goods) |
RS2 | 100 mg∙L-1 Fe+100 mg∙L-1 Si | FeEDTA (Librel BMX), K2SiO3·xH2O (goods) |
Table 1 Composition of imitated solution reaction system
Reaction system (RS) | Ingredients | Compound and source |
---|---|---|
RS1 | 100 mg∙L-1 Fe+100 mg∙L-1 Si | FeEDTA (self-made), K2SiO3·xH2O (goods) |
RS2 | 100 mg∙L-1 Fe+100 mg∙L-1 Si | FeEDTA (Librel BMX), K2SiO3·xH2O (goods) |
Treatment time (d) | Sunlight RS1 in dark (CK) | Sunlight RS1 | |||
---|---|---|---|---|---|
OD400 | Water (°C) | OD400 | Water (°C) | ||
0 | 0.10 | - | 0.10 | - | |
1 | 0.10 | 38 | 0.12 | 35 | |
2 | 0.10 | 27 | 0.13 | 26 | |
3 | 0.10 | 26 | 0.14 | 25 | |
4 | 0.10 | 24 | 0.15 | 24 | |
5 | 0.10 | 24 | 0.16 | 24 | |
6 | 0.10 | 30 | 0.17 | 30 | |
7 | 0.10 | 27 | 0.18 | 27 | |
8 | 0.11 | 33 | 0.19 | 32 | |
9 | 0.11 | 33 | 0.20 | 32 | |
10 | 0.11 | 32 | 0.23 | 31 |
Table 2 Effects of sunlight and water temperature on the system RS1
Treatment time (d) | Sunlight RS1 in dark (CK) | Sunlight RS1 | |||
---|---|---|---|---|---|
OD400 | Water (°C) | OD400 | Water (°C) | ||
0 | 0.10 | - | 0.10 | - | |
1 | 0.10 | 38 | 0.12 | 35 | |
2 | 0.10 | 27 | 0.13 | 26 | |
3 | 0.10 | 26 | 0.14 | 25 | |
4 | 0.10 | 24 | 0.15 | 24 | |
5 | 0.10 | 24 | 0.16 | 24 | |
6 | 0.10 | 30 | 0.17 | 30 | |
7 | 0.10 | 27 | 0.18 | 27 | |
8 | 0.11 | 33 | 0.19 | 32 | |
9 | 0.11 | 33 | 0.20 | 32 | |
10 | 0.11 | 32 | 0.23 | 31 |
Figure 7 Analysis of contents of photo-chemical outcomes(A) Separate peak 1+2 and peak 6 from the RS1 system in the dark; (B) The complex composed from RS1 system under the sunlight; (C) The complex composed from RS1 system under the LED-blue
Figure 8 Morphological characteristics and chemical constituents of FeEDTA-SiO3 complex(A) The organic membrane with bubbles of the complex of FeEDTA-SiO3 under the electron microscope (Bar=50 nm); (B) The membrane overlap of FeEDTA-SiO3 complex (attention to a lot of pearls on the membrane) (Bar=100 nm); (C) The chemical elements involved in the organic membrane of FeEDTA-SiO3 complex under the electron microscope; (D) The microcrystal pearls on the membrane of FeEDTA-SiO3 complex
Figure 9 Effect of primary extracts of FeEDTA-SiO3 com- plex on the growth of Chlorella beijerinch(A) From left to right in proper order: 0.5 mg∙L-1 extract with 90% alcohol, 0.5 mg∙L-1 extract with pure alcohol, CK, 0.2 mg∙L-1 extract in the dialysis bag, and 0.4 mg∙L-1 extract out of the dialysis bag; (B) The samples were in the dark box of 40°C for 40 d (from left to right in proper order were same as in Figure 9A)
Source and dosage of extracts | Tiller number | Root/shoot | Dry weight (g) |
---|---|---|---|
(1) CK | 3.0 | 0.09±0.02 | 0.67±0.12 |
(2) Pure alcohol extracts, out of the dialysis bag, OD400=0.025 | 4.2 | 0.15±0.01 | 1.25±0.02 |
(3) Ditto, OD400=0.075 | 4.3 | 0.17±0.03 | 1.49±0.32 |
(4) Ditto, OD400=0.22 | 2.3 | 0.08±0.01 | 0.63±0.10 |
(5) 95% alcohol extracts, out of the dialysis bag, OD400=0.042 | 3.8 | 0.15±0.03 | 1.29±0.21 |
(6) Ditto, OD400=0.176 | 3.6 | 0.16±0.02 | 1.42±0.08 |
Table 3 Effect of the FeEDTA-SiO3 on rice growth
Source and dosage of extracts | Tiller number | Root/shoot | Dry weight (g) |
---|---|---|---|
(1) CK | 3.0 | 0.09±0.02 | 0.67±0.12 |
(2) Pure alcohol extracts, out of the dialysis bag, OD400=0.025 | 4.2 | 0.15±0.01 | 1.25±0.02 |
(3) Ditto, OD400=0.075 | 4.3 | 0.17±0.03 | 1.49±0.32 |
(4) Ditto, OD400=0.22 | 2.3 | 0.08±0.01 | 0.63±0.10 |
(5) 95% alcohol extracts, out of the dialysis bag, OD400=0.042 | 3.8 | 0.15±0.03 | 1.29±0.21 |
(6) Ditto, OD400=0.176 | 3.6 | 0.16±0.02 | 1.42±0.08 |
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