Drought Tolerance Assessment of Okra (Abelmoschus esculentus [L.] Moench) Accessions Based on Leaf Gas Exchange and Chlorophyll Fluorescence
Abstract
:1. Introduction
2. Materials and Methods
2.1. Plant Materials and Study Site
2.2. Experimental Design and Crop Establishment
2.3. Data Collection
2.4. Statistical Analysis
3. Results
3.1. Leaf Gas Exchange and Chlorophyll Fluorescence Parameters in Response to Drought
3.2. Correlation between Leaf Gas Exchange and Chlorophyll Fluorescence Parameters under Non-Stressed and Drought-Stressed Conditions
3.3. Principal Component Analysis (PCA) for Leaf Gas Exchange and Chlorophyll Fluorescence Traits
3.4. Heatmap Analysis for Leaf Gas Exchange and Chlorophyll Fluorescence Traits
4. Discussion
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
References
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Accession Code | Accession Number | Database Name | Geographical Origin | DTI | Stem Colour |
---|---|---|---|---|---|
LS01 | VI033775 | ARC/South Africa | Malaysia | 0.02 | Red |
LS02 | VI033797 | ARC/South Africa | Malaysia | 1.16 | Green |
LS03 | VI056457 | ARC/South Africa | Yugoslavia | 1.46 | Red |
LS04 | VI039651 | ARC/South Africa | Bangladesh | 0.67 | Green |
LS05 | VI046561 | ARC/South Africa | Thailand | 1.80 | Red |
LS06 | VI047672 | ARC/South Africa | Bangladesh | 1.00 | Green |
LS07 | VI050150 | ARC/South Africa | Taiwan | 0.13 | Green |
LS08 | VI050957 | ARC/South Africa | Zambia | 0.04 | Green |
LS09 | VI050960 | ARC/South Africa | Zambia | 0.31 | Green |
LS10 | VI055110 | ARC/South Africa | Malaysia | 0.15 | Red |
LS11 | VI055119 | ARC/South Africa | Myanmar | 0.73 | Red |
LS12 | VI055219 | ARC/South Africa | Malaysia | 0.99 | Red |
LS13 | VI055220 | ARC/South Africa | Malaysia | 4.67 | Green |
LS14 | VI055421 | ARC/South Africa | Viet Nam | 1.02 | Green |
LS15 | VI056069 | ARC/South Africa | Cambodia | 0.14 | Red |
LS16 | VI056079 | ARC/South Africa | Cambodia | 3.15 | Green |
LS17 | VI056081 | ARC/South Africa | Cambodia | 0.53 | Red |
LS18 | VI056449 | ARC/South Africa | United States of America | 0.43 | Red |
LS19 | VI060131 | ARC/South Africa | Mali | 0.00 | Green |
LS20 | VI060313 | ARC/South Africa | Tanzania | 6.49 | Green |
LS21 | VI060679 | ARC/South Africa | India | 0.61 | Green |
LS22 | VI060803 | ARC/South Africa | Turkey | 8.64 | Green |
LS23 | VI060817 | ARC/South Africa | Brazil | 0.45 | Green |
LS24 | VI060822 | ARC/South Africa | Nigeria | 0.31 | Green |
LS25 | VI060823 | ARC/South Africa | Nigeria | 0.00 | Green |
LS26 | Clemson Spineless | ARC/South Africa | South Africa | 0.23 | Green |
Source of Variation | d.f. | Leaf Gas Exchange Parameters | |||||||||
gs | T | A | Ci | A/Ci | Ci/Ca | WUEi | WUEins | ||||
Replications | 1 | 0.07 * | 3.19 ns | 34.76 ns | 806,541 * | 0.03 ns | 7.30 * | 324,534 * | 3675 ns | ||
Incomplete Blocks | 1 | 0.01 ns | 1.92 ns | 54.88 ns | 15,807 ns | 0.05 ns | 1.48 ns | 4185 ns | 685 ns | ||
Genotype (G) | 25 | 0.13 ** | 13.45 ** | 65.50 ns | 165,972 ns | 0.06 ns | 1.13 ns | 140,060 * | 652,347 ** | ||
Water Regime (WR) | 1 | 0.38 ** | 75.62 ** | 448.16 ** | 1,830,530 * | 0.04 ns | 20.94 ** | 3,444,897 ** | 20,180,480 ** | ||
G × WR | 25 | 0.01 ns | 14.46 ** | 30.41 * | 100,917 ns | 0.06 ns | 1.03 ns | 140,099 * | 644,150 ** | ||
Residual | 50 | 0.11 | 4.33 | 31.35 | 174,990 | 0.07 | 1 | 56,471 | 205,739 | ||
Source of Variation | d.f. | Chlorophyll Fluorescence Parameters | YPP | ||||||||
FO′ | Fm′ | Fv′/Fm′ | ɸPSII | qP | qN | ETR | ETR/A | AES | |||
Replications | 1 | 8892 ns | 32,989 ns | 0.22 * | 0.08 ns | 0.11 ns | 0.25 ns | 3.72 ns | 586,500 ns | 2518 ns | 1186.7 * |
Incomplete Blocks | 1 | 8535 ns | 468,996 * | 0.02 ns | 0.06 ns | 0.24 * | 1.69 * | 1.40 ns | 164,477 ns | 15,882 ns | 127.6 ns |
Genotype (G) | 25 | 28,927 ** | 292,297 * | 0.17 * | 0.17 ** | 0.25 ** | 1.94 ** | 2.86 * | 356,680 ns | 14,198 ns | 1023.2 * |
Water Regime (WR) | 1 | 844,279 ** | 20,220,415 ** | 0.66 ** | 1.35 ** | 1.20 ** | 8.68 ** | 4.16 ns | 101,913 ** | 424,290 ** | 6913.0 ** |
G × W | 25 | 19,264 * | 472,144 ** | 0.05 * | 0.16 ** | 0.20 ** | 1.69 ** | 1.86 ns | 301,433 * | 12,027 ns | 194.9 * |
Residual | 50 | 9080 | 115,681 | 0.08 | 0.03 | 0.14 | 0.38 | 1.2 | 156,859 | 11,175 | 183.9 |
Genotype | Leaf Gas Exchange Parameters | Chlorophyll Fluorescence Parameters | YPP | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gs | T | A | Ci | A/Ci | Ci/Ca | WUEi | WUEins | Fo′ | Fm′ | Fv′/Fm′ | ɸPSII | qP | qN | ETR | ETR/A | AES | ||
LS01 | 0.19 | 1.52 | 21.85 | 1.33 | 0.12 | 1.33 | 171.30 | 17.77 | 388.4 | 828.1 | 0.75 | 0.33 | 0.14 | 1.24 | 22,026 | 1129.9 | 56.59 | 7.02 |
LS02 | 0.3 | 1.06 | 27.91 | 0.74 | 0.15 | 0.74 | 162.40 | 26.39 | 302.9 | 787.7 | 0.41 | 0.19 | 0.19 | 2.23 | 30,068 | 1082.6 | 26.09 | 7.83 |
LS03 | 0.26 | 7.01 | 16.24 | 0.84 | 0.14 | 0.84 | 62.00 | 2.32 | 311.6 | 871.8 | 0.57 | 0.30 | 0.35 | 2.78 | 13,186 | 801.6 | 17.98 | 8.79 |
LS04 | 0.24 | 2.52 | 24.93 | 0.78 | 0.17 | 0.78 | 102.20 | 10.58 | 168.8 | 860 | 0.28 | 0.29 | 0.48 | 0.75 | 21,020 | 807.40 | 20.85 | 6.09 |
LS05 | 0.20 | 2.01 | 21.05 | 1.37 | 0.07 | 1.37 | 164.90 | 10.45 | 186.8 | 421.4 | 0.61 | 0.04 | 0.02 | 1.23 | 2815 | 137.10 | 33.70 | 7.33 |
LS06 | 0.23 | 6.56 | 26.95 | 0.68 | 0.15 | 0.68 | 195.90 | 4.18 | 179.7 | 252.3 | 0.37 | 0.37 | 0.25 | 0.74 | 8148 | 306.70 | 18.36 | 8.00 |
LS07 | 0.22 | 1.56 | 29.82 | 0.62 | 0.18 | 0.62 | 136.60 | 28.44 | 166.3 | 678 | 0.44 | 0.24 | 0.15 | 0.68 | 24,945 | 739.40 | 18.34 | 2.92 |
LS08 | 0.29 | 1.52 | 30.01 | 0.75 | 0.11 | 0.75 | 109.70 | 20.87 | 444.4 | 552.3 | 0.40 | 0.24 | 0.16 | 0.76 | 37,921 | 1226.80 | 26.13 | 2.63 |
LS09 | 0.39 | 4.02 | 21.02 | 1.65 | 0.14 | 1.65 | 55.10 | 11.61 | 227.4 | 822 | 0.64 | 0.40 | 0.14 | 1.24 | 23,498 | 1113.60 | 26.52 | 7.17 |
LS10 | 0.34 | 1.26 | 35.54 | 1.66 | 0.15 | 1.66 | 108 | 28.26 | 434 | 811.10 | 0.80 | 0.30 | 0.33 | 1.23 | 52,313 | 1464.40 | 18.63 | 6.88 |
LS11 | 0.27 | 1.01 | 28.85 | 0.78 | 0.11 | 0.78 | 107.40 | 28.44 | 207.10 | 139.6 | 0.53 | 0.37 | 0.14 | 2.31 | 23,806 | 776.30 | 14.05 | 9.23 |
LS12 | 0.29 | 5.52 | 23.9 | 0.59 | 0.16 | 0.59 | 80.40 | 5.90 | 263.6 | 769 | 0.35 | 0.29 | 0.83 | 1.22 | 24,860 | 1047.40 | 37.65 | 7.68 |
LS13 | 0.28 | 9.02 | 25.05 | 0.78 | 0.18 | 0.78 | 92.80 | 2.78 | 193.7 | 864.70 | 0.51 | 0.24 | 0.48 | 0.77 | 9184 | 378.90 | 15.30 | 6.13 |
LS14 | 0.19 | 2.02 | 29.08 | 1.90 | 0.17 | 1.90 | 173 | 14.42 | 391.3 | 845.40 | 0.44 | 0.28 | 0.13 | 2.76 | 26,106 | 852.30 | 15.70 | 8.56 |
LS15 | 0.50 | 7.56 | 29.91 | 0.66 | 0.13 | 0.66 | 61.30 | 4.39 | 370.7 | 472.90 | 0.93 | 0.37 | 0.26 | 1.76 | 37,168 | 1223.10 | 30.08 | 4.82 |
LS16 | 0.14 | 5.51 | 16.5 | 0.83 | 0.06 | 0.83 | 303.10 | 10.20 | 174.8 | 824 | 0.13 | 0.03 | 0.16 | 0.75 | 26,910 | 1553.60 | 24.12 | 0.01 |
LS17 | 0.53 | 2.51 | 22.08 | 0.71 | 0.12 | 0.71 | 41.40 | 12.74 | 289.8 | 794.50 | 0.74 | 0.31 | 0.36 | 1.24 | 21,657 | 961.70 | 33.09 | 6.00 |
LS18 | 0.22 | 6.41 | 27.08 | 0.69 | 0.18 | 0.69 | 142.80 | 4.43 | 355.9 | 903.20 | 0.45 | 0.43 | 0.15 | 1.77 | 18,416 | 690.20 | 22.91 | 6.10 |
LS19 | 0.32 | 8.02 | 28.84 | 0.61 | 0.18 | 0.61 | 88.70 | 3.60 | 260.5 | 692.70 | 0.36 | 0.40 | 0.12 | 1.69 | 26,298 | 918.80 | 18.44 | 11.55 |
LS20 | 0.14 | 1.22 | 21.77 | 1.00 | 0.12 | 1.00 | 163.30 | 57.12 | 79.6 | 909.80 | 0.59 | 0.00 | 0.10 | 2.80 | 6732 | 323.60 | 12.72 | 8.08 |
LS21 | 0.17 | 1.26 | 38.69 | 2.27 | 0.13 | 2.27 | 238.50 | 30.68 | 146.1 | 790.50 | 0.51 | 0.33 | 2.33 | 0.73 | 59,155 | 1528.80 | 61.12 | 9.58 |
LS22 | 0.24 | 1.11 | 22.39 | 0.98 | 0.10 | 0.98 | 98 | 55.81 | 321 | 229.10 | 0.48 | 0.17 | 0.33 | 1.78 | 17,721 | 763.20 | 12.77 | 11.44 |
LS23 | 0.16 | 7.51 | 21.38 | 1.73 | 0.18 | 1.73 | 168.70 | 3.25 | 124.2 | 155.40 | 0.49 | 0.27 | 0.2 | 0.82 | 20,206 | 939.50 | 32.53 | 8.00 |
LS24 | 0.27 | 9.26 | 27.77 | 1.34 | 0.10 | 1.34 | 102.60 | 3.07 | 229.5 | 500.20 | 0.50 | 0.25 | 0.10 | 0.80 | 35,469 | 1381.90 | 30.68 | 13.25 |
LS25 | 0.28 | 1.12 | 23.3 | 0.76 | 0.1 | 0.76 | 86.4 | 26.53 | 111.6 | 927.5 | 0.33 | 0.36 | 0.39 | 0.78 | 28,312 | 1215.7 | 59.69 | 7.04 |
LS26 | 0.33 | 3.57 | 23.68 | 0.69 | 0.11 | 0.69 | 73.1 | 7.91 | 200.6 | 495.2 | 0.57 | 0.09 | 0.13 | 1.25 | 28,203 | 1191.7 | 17.33 | 5.24 |
Mean | 0.27 | 3.91 | 25.6 | 1.03 | 0.14 | 1.03 | 126.52 | 16.62 | 251.17 | 661.48 | 0.51 | 0.26 | 0.32 | 1.39 | 24,852 | 944.47 | 26.98 | 7.2 |
p-value | * | * | * | ns | ns | * | * | * | ns | ** | * | ** | ** | ** | ns | ns | ns | ** |
SED | 0.09 | 2.23 | 5.5 | 201 | 0.44 | 0.51 | 52.13 | 19.36 | 122 | 191.1 | 0.16 | 0.08 | 0.23 | 0.43 | 13,977 | 459.9 | 15.5 | 4.35 |
LSD (5%) | 0.18 | 4.59 | 11.35 | 415 | 0.09 | 1.05 | 107.4 | 29.87 | 251.3 | 393.6 | 0.33 | 0.16 | 0.47 | 0.89 | 28,786 | 947 | 32.06 | 5.55 |
CV (%) | 32.2 | 55.97 | 25.52 | 51.74 | 32.79 | 39.54 | 41.2 | 48.47 | 48.58 | 28.89 | 31.66 | 30.25 | 71.11 | 31.04 | 56.24 | 48.69 | 47.7 | 33.78 |
Genotype | Leaf Gas Exchange Parameters | Chlorophyll Fluorescence Parameters | YPP | |||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gs | T | A | Ci | A/Ci | Ci/Ca | WUEi | WUEins | Fo’ | Fm′ | Fv′/Fm′ | ɸPSII | qP | qN | ETR | ETR/A | AES | ||
LS01 | 0.16 | 0.01 | 24.6 | 425.1 | 0.12 | 1.11 | 847.90 | 1881.90 | 442.20 | 1826 | 0.36 | 0.06 | 0.11 | 3.75 | 27,140 | 1111 | 263 | 3.92 |
LS02 | 0.31 | 1.01 | 29.03 | 316.1 | 0.23 | 0.80 | 193.30 | 1212.90 | 420.80 | 1733 | 0.40 | 0.05 | 0.11 | 3.72 | 19,975 | 682 | 116.60 | 2.58 |
LS03 | 0.16 | 0.01 | 11.11 | 216.9 | 0.14 | 3.55 | 72.60 | 1196.30 | 465.60 | 1775 | 0.33 | 0.05 | 0.13 | 0.72 | 19,196 | 1782 | 98.00 | 2.50 |
LS04 | 0.09 | 0.01 | 19.9 | 1064 | 0.07 | 1.97 | 225.80 | 2164.70 | 489.80 | 282 | 0.24 | 0.04 | 0.21 | 2.80 | 16,373 | 791 | 66.80 | 4.19 |
LS05 | 0.13 | 4.51 | 15.11 | 763.3 | 0.15 | 0.66 | 178.50 | 372.80 | 443.50 | 1890 | 0.41 | 0.00 | 0.05 | 1.78 | 10,688 | 683 | 562.80 | 6.17 |
LS06 | 0.12 | 2.51 | 15.27 | 920.7 | 0.05 | 2.86 | 312.20 | 696.50 | 54.80 | 1775 | 0.36 | 0.03 | 0.09 | 2.74 | 13,797 | 898 | 113.70 | 5.05 |
LS07 | 0.17 | 4.51 | 16.03 | 728.6 | 0.13 | 0.83 | 198.90 | 312.60 | 104.80 | 1746 | 0.49 | 0.04 | 0.06 | 0.71 | 18,534 | 1156 | 104.20 | 7.92 |
LS08 | 0.10 | 0.01 | 16.82 | 225.8 | 0.15 | 1.08 | 252.70 | 1354.60 | 509.10 | 1774 | 0.34 | 0.06 | 0.13 | 1.72 | 34,541 | 2044 | 86.00 | 6.58 |
LS09 | 0.29 | 0.01 | 24.22 | 881.6 | 0.05 | 2.79 | 98.60 | 1933.30 | 483.00 | 1598 | 0.38 | 0.10 | 0.11 | 0.66 | 39,986 | 1902 | 199.90 | 4.60 |
LS10 | 0.27 | 6.12 | 30.16 | 671.2 | 0.13 | 3.07 | 565.20 | 522.10 | 449.5 | 2867 | 0.37 | 0.04 | 0.03 | 3.7 | 16,452 | 551 | 263.50 | 14.00 |
LS11 | 0.03 | 0.01 | 20.65 | 1205.9 | 0.12 | 1.83 | 923.40 | 1986.30 | 506.8 | 1809 | 0.24 | 0.05 | 0.12 | 3.74 | 20,909 | 1007 | 70.40 | 6.76 |
LS12 | 0.21 | 0.01 | 22.17 | 221.40 | 0.14 | 0.57 | 155.90 | 1918.90 | 461.2 | 344 | 0.42 | 0.05 | 0.34 | 1.75 | 23,095 | 1057 | 111.50 | 2.85 |
LS13 | 0.02 | 2.01 | 25.32 | 1058 | 0.05 | 2.74 | 1438.8 | 734.60 | 505.7 | 640 | 0.32 | 0.05 | 0.10 | 2.67 | 23,537 | 871 | 112.80 | 2.00 |
LS14 | 0.17 | 0.51 | 24.54 | 290.40 | 0.10 | 1.25 | 311.4 | 761.80 | 519.20 | 963 | 0.34 | 0.06 | 0.16 | 0.69 | 24,880 | 1041 | 114.40 | 4.48 |
LS15 | 0.34 | 1.01 | 22.62 | 598.30 | 0.13 | 2.06 | 565.6 | 995.90 | 497.90 | 1805 | 0.35 | 0.06 | 0.16 | 1.74 | 29,353 | 1316 | 170.70 | 4.71 |
LS16 | 0.15 | 2.01 | 17.14 | 234.40 | 0.15 | 1.09 | 122.9 | 330.50 | 539 | 1533 | 0.37 | 0.02 | 0.09 | 1.32 | 8937 | 516 | 67.60 | 2.63 |
LS17 | 0.28 | 9.01 | 26.83 | 959.40 | 0.10 | 2.49 | 901.1 | 1048 | 429.90 | 806 | 0.38 | 0.09 | 0.19 | 2.71 | 41,445 | 1542 | 89.20 | 3.69 |
LS18 | 0.25 | 3.67 | 23.51 | 1167.80 | 0.09 | 1.71 | 696.1 | 601.70 | 478.40 | 1709 | 0.33 | 0.04 | 0.19 | 3.69 | 19,453 | 842 | 311.90 | 5.42 |
LS19 | 0.14 | 0.01 | 16.48 | 641.60 | 0.04 | 1.65 | 764.1 | 1392.50 | 373.80 | 1803 | 0.47 | 0.05 | 0.2 | 1.75 | 20,599 | 1228 | 91.50 | 0.50 |
LS20 | 0.02 | 3.51 | 24.42 | 909 | 0.05 | 2.36 | 1256.1 | 1039.60 | 449.40 | 1714 | 0.26 | 0.05 | 0.11 | 2.7 | 19,890 | 849 | 163.10 | 0.75 |
LS21 | 0.16 | 0.62 | 24.17 | 211.60 | 0.28 | 0.54 | 836.5 | 97.70 | 498.80 | 762 | 0.39 | 0.06 | 0.12 | 0.72 | 25,724 | 1072 | 82.20 | 4.17 |
LS22 | 0.10 | 0.01 | 21.33 | 718.40 | 0.08 | 1.85 | 476.4 | 2161 | 307 | 1826 | 0.33 | 0.03 | 0.05 | 0.8 | 8129 | 381 | 64.90 | 1.75 |
LS23 | 0.10 | 4.51 | 24.23 | 234.80 | 0.12 | 3.60 | 511.8 | 375.60 | 505.90 | 1651 | 0.23 | 0.05 | 0.09 | 0.67 | 10,832 | 485 | 154.50 | 5.88 |
LS24 | 0.26 | 3.66 | 24.96 | 863.40 | 0.10 | 3.23 | 297.5 | 257.80 | 518.20 | 1848 | 0.26 | 0.04 | 0.13 | 2.25 | 18,797 | 772 | 102.9 | 4.17 |
LS25 | 0.11 | 4.01 | 19.88 | 697.70 | 0.06 | 2.30 | 366.5 | 706.30 | 364.20 | 1774 | 0.30 | 0.05 | 0.00 | 0.78 | 21,796 | 1140 | 360.60 | 0.01 |
LS26 | 0.10 | 4.01 | 17.15 | 815.40 | 0.06 | 2.09 | 184.6 | 1379.50 | 397.10 | 1874 | 0.34 | 0.04 | 0.26 | 0.79 | 8071 | 466 | 80.00 | 4.00 |
Mean | 0.16 | 2.20 | 21.45 | 644 | 0.11 | 1.93 | 490.55 | 1055.21 | 431.37 | 1543.35 | 0.35 | 0.05 | 0.13 | 1.96 | 20,851.1 | 1007.12 | 154.72 | 4.31 |
p-value | * | ** | * | ns | ns | * | * | ** | ** | ** | ns | * | ns | ** | * | ** | ns | * |
SED | 0.07 | 1.91 | 4.5 | 503 | 0.08 | 1.21 | 317.1 | 641.5 | 57.65 | 442.6 | 0.1 | 0.02 | 0.09 | 0.61 | 6837 | 304.6 | 148.1 | 2.25 |
LSD (5%) | 0.14 | 3.92 | 9.3 | 1036 | 0.18 | 2.5 | 653.1 | 1321 | 118.7 | 911.6 | 0.21 | 0.04 | 0.19 | 1.23 | 14,081 | 627.3 | 305 | 4.21 |
CV (%) | 42.44 | 46.4 | 20.98 | 76.77 | 74.92 | 62.98 | 64.65 | 71.47 | 13.36 | 28.68 | 28.96 | 39.83 | 69.85 | 30.87 | 32.79 | 30.25 | 95.71 | 25.76 |
Traits | gs | T | A | Ci | A/Ci | Ci/Ca | WUEi | WUEins | FO′ | Fm′ | Fv′/Fm′ | ɸPSII | qP | qN | ETR | ETR/A | AES | YPP |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
gs | 1.00 | 0.17 ns | 0.57 * | −0.16 ns | 0.31 ns | −0.18 ns | −0.33 ns | −0.13 ns | 0.19 ns | 0.23 ns | 0.47 * | 0.54 ** | 0.14 ns | 0.11 ns | 0.45 * | 0.21 ns | 0.18 ns | 0.25 ns |
T | 0.13 ns | 1.00 | 0.23 ns | 0.30 ns | −0.12 ns | 0.30 ns | 0.14 ns | −0.55 ** | −0.22 ns | 0.28 ns | 0.27 ns | −0.07 ns | −0.21 ns | 0.11 ns | −0.16 ns | 0.24 ns | 0.45 * | 0.31 ns |
A | 0.14 ns | −0.19 ns | 1.00 | 0.12 ns | 0.15 ns | 0.09 ns | 0.48 * | −0.34 ns | 0.46 ns | −0.18 ns | 0.37 ns | 0.42 * | −0.03 ns | 0.43 * | 0.45 * | −0.26 ns | 0.02 ns | 0.18 ns |
Ci | −0.31 ns | −0.29 ns | 0.30 ns | 1.00 | −0.61 ** | 0.31 ns | 0.38 ns | 0.26 ns | −0.26 ns | 0.03 ns | 0.16 ns | −0.03 ns | −0.03 ns | 0.43 * | 0.04 ns | 0.14 ns | 0.14 ns | 0.66 ** |
A/Ci | 0.04 ns | 0.29 ns | 0.35 ns | −0.02 ns | 1.00 | −0.57 ** | −0.28 ns | −0.29 ns | 0.23 ns | −0.16 ns | 0.03 ns | −0.06 ns | −0.07 ns | 0.01 ns | 0.15 ns | 0.01 ns | 0.03 ns | 0.24 ns |
Ci/Ca | −0.31 ns | −0.29 ns | 0.38 ns | 1.00 ** | −0.02 ns | 1.00 | 0.13 ns | 0.07 ns | 0.22 ns | 0.36 ns | 0.28 ns | −0.19 ns | −0.19 ns | 0.01 ns | 0.03 ns | 0.03 ns | −0.19 ns | 0.67 ** |
WUEi | −0.75 ** | −0.14 ns | 0.16 ns | 0.45 ns | −0.20 ns | 0.35 ns | 1.00 | −0.17 ns | 0.24 ns | −0.12 ns | 0.33 ns | 0.22 ns | −0.07 ns | 0.43 * | 0.23 ns | 0.68 ** | −0.04 ns | 0.48 * |
WUEins | −0.24 ns | −0.74 ** | 0.16 ns | 0.13 ns | −0.35 ns | 0.13 ns | 0.14 ns | 1.00 | 0.15 ns | −0.29 ns | 0.03 ns | 0.30 ns | 0.39 * | 0.16 ns | 0.29 ns | 0.23 ns | 0.27 ns | −0.23 ns |
Fo′ | 0.36 ns | −0.06 ns | 0.39 ns | 0.01 ns | 0.12 ns | 0.01 ns | −0.35 ns | −0.21 ns | 1.00 | −0.22 ns | 0.14 ns | 0.24 ns | 0.24 ns | 0.18 ns | 0.24 ns | 0.18 ns | 0.03 ns | 0.83 ** |
Fm′ | 0.01 ns | −0.12 ns | −0.15 ns | 0.02 ns | 0.26 ns | 0.02 ns | −0.01 ns | −0.08 ns | 0.13 ns | 1.00 | 0.33 ns | −0.27 ns | 0.55 ** | 0.13 ns | −0.27 ns | −0.12 ns | 0.25 ns | 0.40 * |
Fv′/Fm′ | 0.21 ns | −0.17 ns | 0.193 ns | −0.12 ns | 0.23 ns | −0.12 ns | 0.03 ns | −0.18 ns | 00.21 ns | 0.27 ns | 1.00 | 0.46 * | 00.08 ns | 0.197 ns | 0.53 ** | 0.19 ns | 0.28 ns | 0.36 ns |
ɸPSII | 0.38 ns | 0.36 ns | 0.42 ns | 0.02 ns | 0.51 ** | 0.02 ns | −0.36 ns | −0.44 ns | 0.30 ns | 0.04 ns | 0.05 ns | 1.00 | 0.23 ns | 0.16 ns | 0.87 ** | 0.67 ** | 0.29 ns | −0.09 ns |
qP | −0.12 ns | −0.24 ns | 0.55 * | 0.48 * | 0.08 ns | 0.48 * | 0.23 ns | 0.13 ns | −0.19 ns | 0.29 ns | 0.13 ns | 0.29 ns | 1.00 | 0.15 ns | 0.28 ns | 0.13 ns | 0.48 * | −0.21 ns |
qN | −0.01 ns | −0.25 ns | −0.13 ns | −0.27 ns | 0.17 ns | −0.27 ns | −0.14 ns | 0.18 ns | 0.35 ns | 0.10 ns | −0.12 ns | −0.17 ns | −0.25 ns | 1.00 | 0.08 ns | −0.17 ns | 0.13 ns | 0.25 ns |
ETR | 0.22 ns | −0.19 ns | 0.71 * | 0.38 ns | −0.25 ns | 0.48 * | 0.06 ns | 0.11 ns | 0.31 ns | 0.12 ns | 0.15 ns | 0.37 ns | 0.52 ** | −0.24 ns | 1.00 | 0.82 ** | 0.07 ns | −0.03 ns |
ETR/A | 0.22 ns | −0.16 ns | 0.38 ns | 0.25 ns | −0.22 ns | 0.25 ns | 0.16 ns | −0.15 ns | 0.37 ns | 0.23 ns | 0.27 ns | 0.27 ns | 0.31 ns | −0.37 ns | 0.86 ** | 1.00 | 0.29 ns | −0.60 ** |
AES | −0.03 ns | −0.20 ns | 0.10 ns | 0.33 ns | −0.33 ns | 0.33 ns | 0.27 ns | −0.14 ns | −0.10 ns | 0.21 ns | 0.12 ns | 0.38 ns | 0.52 ** | −0.45 * | 0.37 ns | 0.49 * | 1.00 | 0.19 ns |
YPP | −0.29 ns | −0.26 ns | −0.69 ** | 0.45* | 00.32 ns | 0.45* | 0.37 ns | 0.35 ns | 0.35 ns | −0.35 ns | −0.04 ns | −0.29 ns | −0.23 ns | 0.22 ns | 0.16 ns | 0.11 ns | 0.16 ns | 1.00 |
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Mkhabela, S.S.; Shimelis, H.; Gerrano, A.S.; Mashilo, J. Drought Tolerance Assessment of Okra (Abelmoschus esculentus [L.] Moench) Accessions Based on Leaf Gas Exchange and Chlorophyll Fluorescence. Life 2023, 13, 682. https://doi.org/10.3390/life13030682
Mkhabela SS, Shimelis H, Gerrano AS, Mashilo J. Drought Tolerance Assessment of Okra (Abelmoschus esculentus [L.] Moench) Accessions Based on Leaf Gas Exchange and Chlorophyll Fluorescence. Life. 2023; 13(3):682. https://doi.org/10.3390/life13030682
Chicago/Turabian StyleMkhabela, Sonto Silindile, Hussein Shimelis, Abe Shegro Gerrano, and Jacob Mashilo. 2023. "Drought Tolerance Assessment of Okra (Abelmoschus esculentus [L.] Moench) Accessions Based on Leaf Gas Exchange and Chlorophyll Fluorescence" Life 13, no. 3: 682. https://doi.org/10.3390/life13030682