Roles of Hormones in Elevated pH-Mediated Mitigation of Copper Toxicity in Citrus sinensis Revealed by Targeted Metabolome
Abstract
:1. Introduction
2. Results
2.1. Profiles of HRMs in Leaves
2.2. Profiles of HRMs in Roots
2.3. Principal Component Analysis (PCA) Uploading Plots
3. Discussion
3.1. Cu toxicity and Low pH Displayed Synergistic Impacts on the Levels of HRMs in Leaves and Roots
3.2. Hormones Involved in High pH-Mediated Alleviation of Cu Toxicity and Cu Excess-Mediated Exacerbation of Low pH Toxicity in Leaves and Roots
3.2.1. AUXs in Leaves and Roots
3.2.2. CKs in Leaves and Roots
3.2.3. JAs in Leaves and Roots
3.2.4. ABAs in Leaves and Roots
3.2.5. SAs in Leaves and Roots
3.2.6. GAs in Leaves and Roots
3.2.7. ETH in Roots
3.2.8. SLs in Leaves and Roots
4. Materials and Methods
4.1. Plant Materials
4.2. Extraction and Assay of HRMs in Leaves and Roots
4.3. Data Analysis
5. Conclusions
Supplementary Materials
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Hormones and Related Metabolites | Treatments | |||
---|---|---|---|---|
P3L | P3CL | P5L | P5CL | |
Cytokinins (CKs) | ||||
Kinetin-9-glucoside (K9G) | 0.137 ± 0.137 a | 0.461 ± 0.461 a | ND | 0.159 ± 0.159 a |
N6-Benzyladenine-9-glucoside (BAP9G) | ND | 0.053 ± 0.053 a | ND | 0.034 ± 0.034 a |
ortho-Topolin riboside (oTR) | 1.189 ± 0.145 ab | 0.559 ± 0.281 b | 1.634 ± 0.255 a | 1.200 ± 0.246 ab |
Dihydrozeatin ribonucleoside (DHZR) | 1.249 ± 0.238 a | 0.661 ± 0.136 b | 1.221 ± 0.124 a | 1.227 ± 0.068 a |
N6-Isopentenyl-adenine-7-glucoside (iP7G) | 0.571 ± 0.035 b | 2.392 ± 0.184 a | 0.646 ± 0.034 b | 0.653 ± 0.056 b |
N6-isopentenyladenosine (IPR) | 1.340 ± 0.312 a | 0.399 ± 0.083 b | 0.545 ± 0.063 b | 1.225 ± 0.135 a |
trans-Zeatin-O-glucoside (tZOG) | 23.48 ± 1.47 b | 31.36 ± 0.52 a | 25.63 ± 1.66 b | 24.40 ± 0.41 b |
2-Methylthio-cis-zeatin riboside (2MeScZR) | 0.025 ± 0.025 b | 0.106 ± 0.008 a | 0.022 ± 0.022 b | 0.063 ± 0.010 ab |
N6-isopentenyladenine (IP) | 0.018 ± 0.009 a | 0.033 ± 0.033 a | ND | 0.011 ± 0.011 a |
Dihydrozeatin-7-glucoside (DHZ7G) | 0.179 ± 0.011 c | 2.106 ± 0.306 a | 0.328 ± 0.048 bc | 0.461 ± 0.066 b |
cis-Zeatin (cZ) | 0.096 ± 0.051 a | ND | 0.167 ± 0.027 a | 0.053 ± 0.053 a |
cis-Zeatin-9-glucoside (cZ9G) | 1.394 ± 0.179 b | 4.363 ± 0.490 a | 1.291 ± 0.290 b | 1.515 ± 0.140 b |
N6-Benzyladenine-7-glucoside (BAP7G) | 0.153 ± 0.031 b | 0.298 ± 0.072 a | 0.214 ± 0.007 ab | 0.180 ± 0.018 ab |
Total CKs | 32.33 ± 1.05 b | 45.24 ± 1.03 a | 34.21 ± 1.38 b | 34.02 ± 0.66 b |
Auxins (AUXs) | ||||
N-(3-Indolylacetyl)-L-leucine (IAA-Leu) | 1.348 ± 0.065 a | ND | 1.577 ± 0.087 a | 1.522 ± 0.167 a |
Tryptamine (TRA) | ND | 0.321 ± 0.076 | ND | ND |
Indole-3-acetyl glutamic acid (IAA-Glu) | 0.517 ± 0.265 b | 1.822 ± 0.433 a | 0.817 ± 0.423 ab | 0.508 ± 0.265 b |
1-O-indol-3-ylacetylglucose (IAGlc) | 25.51 ± 12.78 a | 41.09 ± 24.90 a | 46.13 ± 23.15 a | ND |
3-Indole acetamide (IAM) | ND | 0.892 ± 0.892 | ND | ND |
L-tryptophan (TRP) | 2089 ± 254 b | 17494 ± 1124 a | 2305 ± 193 b | 1854 ± 73 b |
Indole-3-acetyl-L-tryptophan (IAA-Trp) | 0.598 ± 0.051 c | 2.356 ± 0.328 a | 0.549 ± 0.069 c | 1.506 ± 0.114 b |
Indole-3-acetic acid (IAA) | 5.418 ± 0.098 b | 11.853 ± 1.333 a | 6.083 ± 0.792 b | 7.052 ± 0.959 b |
N-(3-Indolylacetyl)-L-valine (IAA-Val) | 2.366 ± 0.011 c | 3.531 ± 0.080 a | 3.258 ± 0.132 ab | 3.072 ± 0.085 b |
Methyl indole-3-acetate (MEIAA) | 0.262 ± 0.032 b | 0.586 ± 0.049 a | 0.325 ± 0.046 b | 0.329 ± 0.025 b |
Indole-3-carboxaldehyde (ICAld) | 33.75 ± 0.53 b | 65.51 ± 4.54 a | 36.26 ± 0.87 b | 42.06 ± 2.69 b |
Indole-3-lactic acid (ILA) | 16.13 ± 0.80 b | 30.55 ± 1.00 a | 19.31 ± 0.81 b | 17.70 ± 1.33 b |
3-Indoleacetonitrile (IAN) | 1.693 ± 0.141 b | 2.967 ± 0.595 a | 1.457 ± 0.323 b | 1.796 ± 0.268 ab |
Total AUXs | 2223 ± 262 b | 17701 ± 1153 a | 2474 ± 172 b | 1975 ± 78 b |
Jasmonates (JAs) | ||||
Jasmonoyl-L-isoleucine (JA-ILE) | 7.422 ± 0.764 b | 25.321 ± 5.471 a | 10.379 ± 4.166 b | 30.813 ± 4.151 a |
Dihydrojasmonic acid (H2JA) | 2.343 ± 0.069 a | 1.545 ± 0.142 c | 1.708 ± 0.100 bc | 2.168 ± 0.242 ab |
cis(+)-12-Oxophytodienoic acid (OPDA) | 166.33 ± 15.09 a | 71.94 ± 10.67 b | 99.61 ± 14.27 b | 107.17 ± 17.25 b |
N-[(−)-Jasmonoyl]-(L)-valine (JA-Val) | 0.601 ± 0.018 ab | 0.393 ± 0.105 b | 0.753 ± 0.337 ab | 1.143 ± 0.088 a |
Gibberellins (GAs) | ||||
Gibberellin A24 (GA24) | 5.694 ± 0.188 b | 7.597 ± 0.891 a | 5.692 ± 0.243 b | 6.091 ± 0.190 ab |
Abscisates (ABAs) | ||||
Abscisic acid (ABA) | 13.61 ± 1.14 b | 72.18 ± 2.95 a | 10.95 ± 0.45 b | 15.53 ± 0.59 b |
ABA-glucosyl ester (ABA-GE) | 185.2 ± 101.7 b | 521.1 ± 57.5 a | 315.9 ± 48.4 ab | 475.3 ± 60.6 a |
Total ABAs | 198.9 ± 101.0 c | 593.3 ± 59.1 a | 326.9 ± 48.2 bc | 490.8 ± 61.0 ab |
Salicylates (SAs) | ||||
Salicylic acid 2-O-β-glucoside (SAG) | 23.15 ± 2.61 b | 187.55 ± 40.93 a | 33.30 ± 5.57 b | 33.67 ± 2.13 b |
Salicylic acid (SA) | 75.23 ± 7.59 b | 111.18 ± 12.72 a | 82.49 ± 5.73 b | 86.71 ± 4.43 ab |
Total SAs | 98.38 ± 10.18 b | 298.73 ± 33.54 a | 115.80 ± 6.11 b | 120.38 ± 4.36 b |
Strigolactones (SLs) | ||||
(±)Strigol (ST) | 107.2 ± 4.2 b | 238.8 ± 18.0 a | 126.6 ± 4.9 b | 122.8 ± 18.6 b |
5-Deoxystrigol (5DS) | 12.58 ± 0.82 a | 8.57 ± 0.41 b | 10.83 ± 0.69 a | 12.69 ± 0.28 a |
Total SLs | 119.7 ± 3.9 b | 247.4 ± 17.8 a | 137.4 ± 5.3 b | 135.5 ± 18.9 b |
Hormones and Related Metabolites | Treatments | |||
---|---|---|---|---|
P3R | P3CR | P5R | P5CR | |
CKs | ||||
cis-Zeatin riboside (cZR) | 0.481 ± 0.055 ab | 0.373 ± 0.015 bc | 0.585 ± 0.044 a | 0.291 ± 0.013 c |
2-Methylthio-N6-isopentenyladenosine (2MeSiPR) | 4.760 ± 0.259 bc | 7.322 ± 0.768 a | 6.277 ± 0.544 ab | 4.320 ± 0.309 c |
6-Benzyladenosine (BAPR) | 0.049 ± 0.008 b | 0.024 ± 0.007 c | 0.072 ± 0.003 a | 0.008 ± 0.004 c |
N6-Isopentenyl-adenine-9-glucoside (iP9G) | 0.068 ± 0.034 b | 0.187 ± 0.017 a | 0.099 ± 0.008 b | 0.212 ± 0.037 a |
trans-Zeatin (tZ) | 0.190 ± 0.001 b | 0.295 ± 0.024 a | ND | 0.201 ± 0.006 b |
K9G | 0.166 ± 0.033 a | 0.077 ± 0.077 a | 0.057 ± 0.057 a | ND |
BAP9G | ND | 0.221 ± 0.015 a | ND | 0.022 ± 0.012 b |
6-Benzyladenine (BAP) | ND | 0.023 ± 0.023 b | 0.069 ± 0.007 a | 0.020 ± 0.010 b |
2-Methylthio-N6-isopentenyladenine (2MeSiP) | 0.005 ± 0.005 b | 0.099 ± 0.010 a | ND | 0.007 ± 0.007 b |
IPR | 1.015 ± 0.072 b | 0.222 ± 0.016 c | 3.097 ± 0.238 a | 0.350 ± 0.017 c |
cis-Zeatin-O-glucoside riboside (cZROG) | 0.880 ± 0.009 b | 1.013 ± 0.036 a | 0.870 ± 0.009 b | 0.926 ± 0.007 b |
trans-Zeatin riboside (tZR) | 1.292 ± 0.077 b | 0.524 ± 0.026 d | 1.867 ± 0.190 a | 0.931 ± 0.055 c |
ortho-Topolin (oT) | 0.043 ± 0.005 ab | 0.117 ± 0.046 a | 0.036 ± 0.004 b | 0.073 ± 0.014 ab |
tZOG | 3.044 ± 0.105 b | 4.647 ± 0.419 a | 4.515 ± 0.148 a | 2.896 ± 0.031 b |
IP | 0.038 ± 0.003 b | 0.697 ± 0.040 a | 0.033 ± 0.006 b | 0.086 ± 0.009 b |
para-Topolin (pT) | 0.034 ± 0.034 a | 0.087 ± 0.044 a | ND | ND |
cZ | ND | 0.519 ± 0.004 a | ND | 0.061 ± 0.006 b |
BAP7G | ND | ND | 0.001 ± 0.001 | ND |
Total CKs | 12.58 ± 0.36 b | 16.99 ± 0.82 a | 18.11 ± 0.54 a | 10.92 ± 0.31 b |
AUXs | ||||
2-oxindole-3-acetic acid (OxIAA) | 12.192 ± 1.479 b | 21.772 ± 2.530 a | 7.893 ± 0.910 b | 18.376 ± 1.023 a |
IAA-Leu | 0.176 ± 0.005 | ND | ND | ND |
Indole-3-acetyl-L-phenylalanne methyle ester (IAA-Phe-Me) | ND | 0.062 ± 0.037 | ND | ND |
TRA | 0.252 ± 0.027 b | 9.115 ± 1.473 a | 1.179 ± 0.185 b | 0.737 ± 0.237 b |
Indole-3-carboxylic acid (ICA) | 1.665 ± 0.120 b | 2.841 ± 0.293 a | 2.931 ± 0.244 a | 1.922 ± 0.147 b |
IAA-Glu | 2.856 ± 0.157 b | 5.892 ± 0.728 a | 2.432 ± 0.397 b | 6.015 ± 0.726 a |
Indole-3-acetyl glycine (IAA-Gly) | 2.577 ± 0.581 ab | 3.439 ± 0.141 a | 2.123 ± 0.200 b | 2.952 ± 0.091 ab |
IAM | ND | ND | 0.628 ± 0.099 | ND |
3-Indolepropionic acid (IPA) | ND | 0.926 ± 0.194 | ND | ND |
TRP | 4366 ± 120 c | 7191 ± 450 a | 5008 ± 312 bc | 5636 ± 251 b |
IAA | 5.785 ± 0.164 c | 11.558 ± 0.614 a | 5.559 ± 0.301 c | 8.672 ± 0.543 b |
Indole-3-acetyl-L-aspartic acid (IAA-Asp) | 20.13 ± 1.02 b | 32.19 ± 2.42 a | 16.17 ± 1.16 b | 33.73 ± 3.12 a |
IAA-Val | 2.004 ± 0.069 a | 1.390 ± 0.170 b | 1.587 ± 0.051 b | 1.354 ± 0.049 b |
MEIAA | 2.430 ± 0.146 b | 9.057 ± 0.509 a | 1.823 ± 0.046 b | 2.346 ± 0.188 b |
ICAld | 8.813 ± 1.238 bc | 22.580 ± 1.114 a | 11.883 ± 1.414 b | 7.546 ± 0.225 c |
IAN | 1.807 ± 0.150 b | 1.631 ± 0.091 b | 2.435 ± 0.230 a | 1.985 ± 0.254 ab |
Total AUXs | 4433 ± 119 c | 7319 ± 446 a | 5070 ± 31 bc | 5727 ± 256 b |
JAs | ||||
JA-ILE | 22.50 ± 1.83 b | 35.89 ± 1.33 a | 34.27 ± 3.70 a | 25.71 ± 1.59 b |
Jasmonic acid (JA) | 84.33 ± 2.53 b | 120.75 ± 5.70 b | 208.24 ± 42.52 a | 157.77 ± 14.98 ab |
3-oxo-2-(2-(Z)-Pentenyl) cyclopen-tane-1-hexanoic acid (OPC-6) | 18.26 ± 0.52 a | ND | 20.08 ± 1.93 a | ND |
3-oxo-2-(2-(Z)-Pentenyl) cyclopen-tane-1-butyric acid (OPC-4) | 16.44 ± 1.31 b | 32.45 ± 2.70 a | 27.20 ± 1.33 a | 29.56 ± 2.95 a |
OPDA | 27.84 ± 2.30 b | 48.15 ± 5.35 b | 97.40 ± 20.46 a | 40.13 ± 2.80 b |
JA-Val | 1.456 ± 0.123 b | 1.250 ± 0.116 b | 2.771 ± 0.386 a | 1.381 ± 0.118 b |
Total JAs | 177.1 ± 5.3 b | 245.8 ± 15.5 b | 399.1 ± 68.2 a | 261.0 ± 21.5 b |
GAs | ||||
Gibberellin A7 (GA7) | 0.009 ± 0.009 a | 0.005 ± 0.005 a | ND | ND |
Gibberellin A1 (GA1) | 28.006 ± 1.227 b | 25.570 ± 2.717 b | 39.848 ± 4.572 a | 6.771 ± 1.411 c |
GA24 | 0.351 ± 0.095 b | 2.105 ± 0.601 a | 0.690 ± 0.113 b | 0.299 ± 0.108 b |
Gibberellin A9 (GA9) | 0.818 ± 0.136 b | 1.849 ± 0.530 a | 0.164 ± 0.164 b | 0.667 ± 0.081 b |
Total GAs | 31.53 ± 1.47 b | 32.87 ± 3.67 ab | 42.76 ± 4.43 a | 10.85 ± 1.33 c |
ABAs | ||||
ABA | 1.769 ± 0.184 b | 3.686 ± 0.137 a | 3.267 ± 0.343 a | 1.787 ± 0.223 b |
Ethylene (ETH) | ||||
1-Aminocyclopropanecarboxylic acid (ACC) | 79.22 ± 1.69 ab | 65.84 ± 4.93 bc | 56.69 ± 1.56 c | 95.64 ± 10.30 a |
Salicylates (SAs) | ||||
SAG | 47.45 ± 1.55 b | 255.51 ± 54.03 a | 43.03 ± 0.64 b | 75.47 ± 4.26 b |
SA | 45.05 ± 2.58 b | 61.19 ± 7.92 a | 60.35 ± 2.52 a | 53.03 ± 0.75 ab |
Total SAs | 92.50 ± 3.40 b | 316.70 ± 55.36 a | 103.38 ± 1.98 b | 128.50 ± 3.62 b |
SLs | ||||
ST | 272.0 ± 11.7 b | 262.7 ± 15.8 b | 295.2 ± 18.6 b | 378.0 ± 32.0 a |
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Zhang, J.; Huang, W.-L.; Huang, W.-T.; Chen, X.-F.; Chen, H.-H.; Ye, X.; Yang, L.-T.; Chen, L.-S. Roles of Hormones in Elevated pH-Mediated Mitigation of Copper Toxicity in Citrus sinensis Revealed by Targeted Metabolome. Plants 2023, 12, 2144. https://doi.org/10.3390/plants12112144
Zhang J, Huang W-L, Huang W-T, Chen X-F, Chen H-H, Ye X, Yang L-T, Chen L-S. Roles of Hormones in Elevated pH-Mediated Mitigation of Copper Toxicity in Citrus sinensis Revealed by Targeted Metabolome. Plants. 2023; 12(11):2144. https://doi.org/10.3390/plants12112144
Chicago/Turabian StyleZhang, Jiang, Wei-Lin Huang, Wei-Tao Huang, Xu-Feng Chen, Huan-Huan Chen, Xin Ye, Lin-Tong Yang, and Li-Song Chen. 2023. "Roles of Hormones in Elevated pH-Mediated Mitigation of Copper Toxicity in Citrus sinensis Revealed by Targeted Metabolome" Plants 12, no. 11: 2144. https://doi.org/10.3390/plants12112144