Silicon Compensates Phosphorus Deficit-Induced Growth Inhibition by Improving Photosynthetic Capacity, Antioxidant Potential, and Nutrient Homeostasis in Tomato
Abstract
:1. Introduction
2. Materials and Methods
2.1. Plant Materials, Growth Conditions, and Treatments
2.2. Determination of Biomass and Root Morphology
2.3. Determination of Photosynthetic Pigment Content and Leaf Gas Exchange Parameters
2.4. Determination of Membrane Lipid Peroxidation, Reactive Oxygen Species, and Antioxidant Enzyme Activity
2.5. Determination of Osmotic Potential and Osmotic Regulatory Substances
2.6. Determination of Element Content
2.7. Statistical Analysis
3. Results
3.1. Exogenous Silicon Improves Plant Growth Under Low Phosphorus Supply
3.2. Exogenous Silicon Increases Chlorophyll Content and Photosynthetic Capacity in Tomato Leaves Under Low Phosphorus Stress
3.3. Effects of Exogenous Silicon and Low Phosphorus on Lipid Peroxidation and ROS Accumulation
3.4. Exogenous Silicon Alleviated Low Phosphorus-Induced Oxidative Stress by Enhancing Antioxidant Enzyme Activity
3.5. Effects of Exogenous Silicon on Osmotic Adjustment under Deficit Phosphorus Supply
3.6. Effects of Exogenous Silicon and Low Phosphorus on Different Element Content in Tomato Leaves and Roots
4. Discussion
Supplementary Materials
Author Contributions
Funding
Conflicts of Interest
References
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Treatment | Shoot Fresh Weight (g) | Root Fresh Weight (g) | Shoot Dry Weight (g) | Root Dry Weight (g) | Total Root Length (cm) | Total Root Surface Area (cm2) | Total Root Volume (cm3) | Average Root Diameter (mm) |
---|---|---|---|---|---|---|---|---|
CT | 28.7 ± 1.55a | 9.97 ± 1.70a | 2.35 ± 0.12a | 0.63 ± 0.06a | 2158 ± 173a | 495 ± 23a | 9.72 ± 1.02a | 0.71 ± 0.04a |
LP | 14.2 ± 3.37b | 4.01 ± 1.44b | 1.05 ± 0.22b | 0.26 ± 0.09c | 1469 ± 305b | 255 ± 36c | 4.73 ± 0.12c | 0.60 ± 0.02b |
LP + Si | 26.0 ± 1.43a | 8.05 ± 0.36a | 2.04 ± 0.11a | 0.48 ± 0.02b | 2306 ± 65a | 408 ± 45b | 7.64 ± 0.47b | 0.66 ± 0.03a |
Treatment | Chl a | Chl b | Carotenoids | Chl (a + b) | Net Photosynthetic Rate (μmol CO2·m−2·S−1) | Stomatal Conductance (molH2O·m−2·s−1) | Intercellular CO2 Concentration (μmol CO2·mol−1 air) | Transpiration Rate (mmolH2O·m−2·s−1) | Water Use Efficiency (mmol CO2·mol−1·H2O) |
---|---|---|---|---|---|---|---|---|---|
CT | 1.94 ± 0.04a | 0.28 ± 0.01a | 0.51 ± 0.01a | 2.22 ± 0.04a | 24.1 ± 1.60a | 0.13 ± 0.04a | 246 ± 24.7c | 4.62 ± 0.32a | 2.97 ± 0.10a |
LP | 1.83 ± 0.01b | 0.25 ± 0.01b | 0.46 ± 0.01b | 2.08 ± 0.03b | 13.8 ± 0.89b | 0.11 ± 0.03c | 293 ± 14.3a | 2.55 ± 0.34c | 2.48 ± 0.05c |
LP + Si | 1.91 ± 0.03a | 0.30 ± 0.03a | 0.50 ± 0.02a | 2.21 ± 0.04a | 22.9 ± 1.72a | 0.12 ± 0.07b | 273 ± 14.9b | 3.21 ± 0.27b | 2.73 ± 0.06b |
Antioxidant Enzymes | Tissue | CT | LP | LP + Si |
---|---|---|---|---|
SOD activity (U·g−1·FW·h−1) | Leaf | 35.5 ± 2.37a | 28.6 ± 1.79b | 36.6 ± 2.20a |
Root | 14.8 ± 1.68a | 11.9 ± 1.09b | 15.25 ± 1.61a | |
POD activity (U·g−1 FW) | Leaf | 2617 ± 85.0a | 2338 ± 78.4b | 2489 ± 83.2b |
Root | 21,964 ± 311a | 14,452 ± 457c | 20,037 ± 731b | |
CAT activity (U·g−1 FW) | Leaf | 88.1 ± 7.42a | 65.7 ± 5.16b | 90.1 ± 8.51a |
Root | 98.4 ± 6.67a | 63.8 ± 7.74b | 100 ± 5.59a |
Element | Tissue | CT | LP | LP + Si |
---|---|---|---|---|
K content (g·kg−1 DW) | Root | 36.0 ± 0.9a | 29.8 ± 1.0c | 32.9 ± 0.1b |
Stem | 125 ± 6.4a | 113 ± 1.8b | 123 ± 3.4a | |
Leaf | 39.4 ± 0.5a | 32.3 ± 1.2b | 32.5 ± 1.8b | |
Na content (g·kg−1 DW) | Root | 17.1 ± 0.5a | 5.4 ± 0.3c | 7.1 ± 1.3b |
Stem | 11.6 ± 0.7a | 3.7 ± 0.4c | 7.6 ± 0.3b | |
Leaf | 2.1 ± 0.4a | 1.4 ± 0.1b | 2.2 ± 0.4a | |
Ca content (g·kg−1 DW) | Root | 12.2 ± 2.3a | 4.0 ± 0.1c | 5.0 ± 0.7b |
Stem | 11.1 ± 2.6a | 3.5 ± 0.6b | 14.0 ± 0.7a | |
Leaf | 15.8 ± 0.9a | 11.7 ± 0.8b | 12.8 ± 2.5ab | |
Mg content (g·kg−1 DW) | Root | 5.9 ± 0.6a | 4.4 ± 0.4c | 5.1 ± 0.1b |
Stem | 7.2 ± 1.3a | 5.6 ± 1.1b | 6.5 ± 0.1b | |
Leaf | 8.7 ± 0.9a | 6.4 ± 0.3c | 7.2 ± 0.3b | |
Fe content (mg·kg−1 DW) | Root | 4562 ± 3571a | 3171 ± 206b | 4292 ± 355a |
Stem | 632 ± 53.4a | 231 ± 60.4b | 584 ± 72.5a | |
Leaf | 459 ± 18.6a | 381 ± 19.0b | 434 ± 18.8a | |
Mn content (mg·kg−1 DW) | Root | 936 ± 17.2a | 615 ± 42.8b | 862 ± 13.3a |
Stem | 63.2 ± 2.7a | 55.0 ± 3.0c | 58.7 ± 2.1b | |
Leaf | 73.6 ± 2.5a | 58.3 ± 3.9b | 60.4 ± 1.6b | |
Zn content (mg·kg−1 DW) | Root | 87.2 ± 1.4a | 71.8 ± 6.4b | 76.5 ± 3.3b |
Stem | 34.5 ± 2.1a | 21.3 ± 0.8b | 32.8 ± 3.1a | |
Leaf | 21.9 ± 4.5a | 15.5 ± 0.5b | 13.3 ± 0.5c | |
Cu content (mg·kg−1 DW) | Root | 87.9 ± 2.4a | 79.9 ± 3.6a | 82.6 ± 6.2a |
Stem | 31.2 ± 7.5a | 16.7 ± 1.8b | 26.7 ± 7.4a | |
Leaf | 27.9 ± 3.0a | 25.3 ± 0.01a | 26.1 ± 2.9a |
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Zhang, Y.; Liang, Y.; Zhao, X.; Jin, X.; Hou, L.; Shi, Y.; Ahammed, G.J. Silicon Compensates Phosphorus Deficit-Induced Growth Inhibition by Improving Photosynthetic Capacity, Antioxidant Potential, and Nutrient Homeostasis in Tomato. Agronomy 2019, 9, 733. https://0-doi-org.brum.beds.ac.uk/10.3390/agronomy9110733
Zhang Y, Liang Y, Zhao X, Jin X, Hou L, Shi Y, Ahammed GJ. Silicon Compensates Phosphorus Deficit-Induced Growth Inhibition by Improving Photosynthetic Capacity, Antioxidant Potential, and Nutrient Homeostasis in Tomato. Agronomy. 2019; 9(11):733. https://0-doi-org.brum.beds.ac.uk/10.3390/agronomy9110733
Chicago/Turabian StyleZhang, Yi, Ying Liang, Xin Zhao, Xiu Jin, Leiping Hou, Yu Shi, and Golam Jalal Ahammed. 2019. "Silicon Compensates Phosphorus Deficit-Induced Growth Inhibition by Improving Photosynthetic Capacity, Antioxidant Potential, and Nutrient Homeostasis in Tomato" Agronomy 9, no. 11: 733. https://0-doi-org.brum.beds.ac.uk/10.3390/agronomy9110733