Salicylic Acid Protects Sweet Potato Seedlings from Drought Stress by Mediating Abscisic Acid-Related Gene Expression and Enhancing the Antioxidant Defense System
Abstract
:1. Introduction
2. Results and Analysis
2.1. SA Protects Photosynthetic Pigments and Increases the Photosynthetic Rate
2.2. SA Reduces Oxidative Stress and Enhances Antioxidant Enzyme Activities
2.3. SA Mediates the Plant Osmotic Status
2.4. SA Effects on Abscisic Acid (ABA) Content and NCED3-Like Gene Express
2.5. SA Improves Growth Traits under Drought-Stress Conditions
3. Discussion
4. Materials and Methods
4.1. Plant Materials and Growing Conditions
4.2. SA Treatment and Drought Stress
4.3. Determination of the Agronomy Traits
4.4. Determination of Chlorophyll Content and Photosynthetic Parameters
4.5. Determination of H2O2 and Malondialdehyde (MDA) Content
4.6. Determination of Antioxidant Enzyme Activities
4.7. Determination of Relative Water Content (RWC) and Soluble Carbohydrate and Protein Contents
4.8. Determination of the ABA Content and Semi-Quantitative RT-PCR Analysis of NCED3-Like Genes
4.9. Statistical Analyses
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Total Chlorophyll Content (mg·g−1FW) | ||||||
---|---|---|---|---|---|---|
Cultivars | Treatment Duration (h) | C0 | C1 | C2 | C3 | C4 |
0.0 | 1.00 | 2.00 | 4.00 | 8.00 | ||
ZS77 | 24 | 3.41 ± 0.08 b | 3.68 ± 0.14 a | 3.54 ± 0.16 a | 3.43 ± 0.09 ab | 3.26 ± 0.11 b |
48 | 2.78 ± 0.11 d | 3.43 ± 0.11 ab | 3.31 ± 0.09 b | 3.11 ± 0.14 c | 2.79 ± 0.07 d | |
72 | 2.38 ± 0.07 e | 2.74 ± 0.14 d | 2.92 ± 0.13 c | 2.91 ± 0.09 c | 2.60 ± 0.07 d | |
ZS13 | 24 | 3.50 ± 0.08 b | 3.62 ± 0.13 a | 3.76 ± 0.09 a | 3.52 ± 0.11 b | 3.47 ± 0.15 b |
48 | 3.02 ± 0.10 c | 3.42 ± 0.09 b | 3.38 ± 0.13 b | 3.27 ± 0.17 c | 2.75 ± 0.12 d | |
72 | 2.62 ± 0.14 d | 2.62 ± 0.09 d | 2.89 ± 0.08 c | 3.07 ± 0.11 c | 2.31 ± 0.13 e |
Item | Treatments | Duration of Drought Stress (h) | |||||
---|---|---|---|---|---|---|---|
ZS77 | ZS13 | ||||||
24 h | 48 h | 72 h | 24 h | 48 h | 72 h | ||
Pn (CO2 μmol·m−2 s−1) | CK | 18.34 ± 0.57 | 19.05 ± 0.82 | 18.74 ± 0.77 | 16.58 ± 0.92 | 16.37 ± 1.11 | 17.05 ± 0.98 |
C0 | 15.74 ± 0.77 | 9.61 ± 0.82 | 7.37 ± 0.54 | 14.04 ± 0.62 | 10.24 ± 0.73 | 5.78 ± 0.59 | |
Tr (H2O mmol·m−2 s−1) | CK | 5.38 ± 0.10 | 5.62 ± 0.09 | 5.55 ± 0.07 | 3.77 ± 0.08 | 3.69 ± 0.11 | 3.73 ± 0.09 |
C0 | 2.71 ± 0.05 | 2.04 ± 0.11 | 1.58 ± 0.09 | 2.02 ± 0.06 | 1.14 ± 0.04 | 0.84 ± 0.07 | |
Gs (H2O mol·m−2 s−1) | CK | 0.214 ± 0.007 | 0.228 ± 0.005 | 0.237 ± 0.08 | 0.188 ± 0.04 | 0.170 ± 0.07 | 0.183 ± 0.10 |
C0 | 0.035 ± 0.002 | 0.026 ± 0.001 | 0.018 ± 0.004 | 0.025 ± 0.001 | 0.016 ± 0.001 | 0.009 ± 0.002 | |
Ci (CO2 μmol·mol−1) | CK | 250.4 ± 4.8 | 256.8 ± 8.5 | 255.6 ± 10.1 | 223.9 ± 7.3 | 240.3 ± 5.2 | 239.2 ± 6.7 |
C0 | 143.4 ± 4.6 | 190.6 ± 7.9 | 223.7 ± 8.1 | 155.6 ± 6.4 | 210.4 ± 8.0 | 244.3 ± 9.0 |
Item | Treatments | Duration of Drought Stress | |||||
---|---|---|---|---|---|---|---|
ZS77 | ZS13 | ||||||
24 h | 48 h | 72 h | 24 h | 48 h | 72 h | ||
H2O2 content (μmol·g−1 FW) | CK | 6.43 ± 0.38 | 6.71 ± 0.44 | 6.59 ± 0.51 | 7.55 ± 0.49 | 7.63 ± 0.33 | 7.59 ± 0.50 |
C0 | 8.52 ± 0.49 | 11.74 ± 0.35 | 12.91 ± 0.66 | 8.58 ± 0.32 | 12.45 ± 0.43 | 13.07 ± 0.47 | |
MDA content (μmol·g−1 FW) | CK | 7.77 ± 0.31 | 7.81 ± 0.47 | 7.69 ± 0.62 | 8.40 ± 0.69 | 8.77 ± 0.63 | 8.64 ± 0.29 |
C0 | 9.01 ± 0.41 | 11.20 ± 0.39 | 13.30 ± 0.70 | 11.38 ± 0.77 | 13.26 ± 0.48 | 15.16 ± 0.65 |
Vine Length (cm) | Dry Matter Weight (g) | Leaf Area (cm2) | ||||
---|---|---|---|---|---|---|
ZS77 | ZS13 | ZS77 | ZS13 | ZS77 | ZS13 | |
C0 | 14.81 ± 1.67 b | 15.46 ± 1.42 b | 15.35 ± 1.78 b | 16.43 ± 1.03 b | 19.58 ± 1.35 c | 20.71 ± 1.22 c |
C1 | 15.62 ± 0.64 b | 16.74 ± 0.67 ab | 16.94 ± 2.37 ab | 17.85 ± 2.78 ab | 20.66 ± 1.67 cb | 21.95 ± 1.54 bc |
C2 | 17.82 ± 0.55 a | 18.08 ± 0.85 a | 19.36 ± 1.08 a | 19.94 ± 1.47 a | 22.82 ± 0.89 ba | 24.44 ± 1.04 ab |
C3 | 17.64 ± 0.61 a | 18.18 ± 0.65 a | 18.93 ± 0.78 a | 19.81 ± 0.95 a | 23.91 ± 0.89 a | 25.35 ± 1.08 a |
C4 | 16.44 ± 0.59 ab | 16.76 ± 0.58 ab | 17.75 ± 1.57 ab | 17.6 ± 1.63 ab | 21.41 ± 2.41 abc | 22.45 ± 2.47 abc |
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Huang, C.; Liao, J.; Huang, W.; Qin, N. Salicylic Acid Protects Sweet Potato Seedlings from Drought Stress by Mediating Abscisic Acid-Related Gene Expression and Enhancing the Antioxidant Defense System. Int. J. Mol. Sci. 2022, 23, 14819. https://doi.org/10.3390/ijms232314819
Huang C, Liao J, Huang W, Qin N. Salicylic Acid Protects Sweet Potato Seedlings from Drought Stress by Mediating Abscisic Acid-Related Gene Expression and Enhancing the Antioxidant Defense System. International Journal of Molecular Sciences. 2022; 23(23):14819. https://doi.org/10.3390/ijms232314819
Chicago/Turabian StyleHuang, Chongping, Junlin Liao, Wenjie Huang, and Nannan Qin. 2022. "Salicylic Acid Protects Sweet Potato Seedlings from Drought Stress by Mediating Abscisic Acid-Related Gene Expression and Enhancing the Antioxidant Defense System" International Journal of Molecular Sciences 23, no. 23: 14819. https://doi.org/10.3390/ijms232314819