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Effects of melatonin on lettuce plant growth, antioxidant enzymes and photosynthetic pigments under salinity stress conditions Cover

Effects of melatonin on lettuce plant growth, antioxidant enzymes and photosynthetic pigments under salinity stress conditions

Folia Horticulturae
Volume 36 (2024): Issue 1 (June 2024)
By: Hemat A. EL-Bauome,  Samar M. Doklega,  Said A. Saleh,  Ahmed S. Mohamed,  Ahmad A. Suliman and  Mahmoud A.M. Abd El-Hady  
Open Access
|Feb 2024

Figures & Tables

Figure 1.

Effect of spraying MT on number of leaves ∙ plant-1 (A), fresh weight (B), leaf area (C) and dry matter (D) of lettuce plants under NaCl stress in the first season. Diverse letters refer to significant variation according to Duncan test. MT, melatonin.
Effect of spraying MT on number of leaves ∙ plant-1 (A), fresh weight (B), leaf area (C) and dry matter (D) of lettuce plants under NaCl stress in the first season. Diverse letters refer to significant variation according to Duncan test. MT, melatonin.

Figure 2.

Effect of spraying MT on number of leaves ∙ plant-1 (A), fresh weight (B), leaf area (C) and dry matter (D) of lettuce plants under NaCl stress in the second season. Diverse letters refer to significant variation according to Duncan test. MT, melatonin.
Effect of spraying MT on number of leaves ∙ plant-1 (A), fresh weight (B), leaf area (C) and dry matter (D) of lettuce plants under NaCl stress in the second season. Diverse letters refer to significant variation according to Duncan test. MT, melatonin.

Figure 3.

Effect of spraying MT on chlorophyll a (A), total chlorophyll (B), chlorophyll b (C) and carotenoids (D) on lettuce plants under NaCl stress in the first season. Diverse letters refer to significant variation according to Duncan test. MT, melatonin.
Effect of spraying MT on chlorophyll a (A), total chlorophyll (B), chlorophyll b (C) and carotenoids (D) on lettuce plants under NaCl stress in the first season. Diverse letters refer to significant variation according to Duncan test. MT, melatonin.

Figure 4.

Effect of spraying MT on chlorophyll a (A), total chlorophyll (B), chlorophyll b (C) and carotenoids (D) on lettuce plants under NaCl stress in the second season. Diverse letters refer to significant variation according to Duncan test. MT, melatonin.
Effect of spraying MT on chlorophyll a (A), total chlorophyll (B), chlorophyll b (C) and carotenoids (D) on lettuce plants under NaCl stress in the second season. Diverse letters refer to significant variation according to Duncan test. MT, melatonin.

Figure 5.

Effect of spraying MT on RWC (A), and EL (B) in the first season and RWC (C), and EL (D) in the second season of lettuce plants under NaCl stress. Diverse letters refer to significant variation according to Duncan test. EL, electrolyte leakage; MT, melatonin; RWC, relative water content.
Effect of spraying MT on RWC (A), and EL (B) in the first season and RWC (C), and EL (D) in the second season of lettuce plants under NaCl stress. Diverse letters refer to significant variation according to Duncan test. EL, electrolyte leakage; MT, melatonin; RWC, relative water content.

Figure 6.

Effect of spraying MT on MDA (A), H2O2 (B) and O2∙- (C) in the first season and MDA (D), H2O2 (E) and O2∙- (F) in the second season of lettuce plants under NaCl stress. Diverse letters refer to significant variation according to Duncan test. MDA, malondialdehyde; MT, melatonin.
Effect of spraying MT on MDA (A), H2O2 (B) and O2∙- (C) in the first season and MDA (D), H2O2 (E) and O2∙- (F) in the second season of lettuce plants under NaCl stress. Diverse letters refer to significant variation according to Duncan test. MDA, malondialdehyde; MT, melatonin.

Figure 7.

Effect of spraying MT on Na+ (A), and Cl- (B) in the first season Na+ (C), and Cl- (D) in the second season of lettuce plants under NaCl stress. Diverse letters refer to significant variation according to Duncan test. MT, melatonin.
Effect of spraying MT on Na+ (A), and Cl- (B) in the first season Na+ (C), and Cl- (D) in the second season of lettuce plants under NaCl stress. Diverse letters refer to significant variation according to Duncan test. MT, melatonin.

Figure 8.

Effect of spraying MT on POD (A), SOD (B) and GR (C) in the first season and POD (D), SOD (E) and GR (F) in the second season of lettuce plants under NaCl stress. Diverse letters refer to significant variation according to Duncan test. GR, glutathione reductase; MT, melatonin; POD, peroxidase; SOD, superoxide dismutase.
Effect of spraying MT on POD (A), SOD (B) and GR (C) in the first season and POD (D), SOD (E) and GR (F) in the second season of lettuce plants under NaCl stress. Diverse letters refer to significant variation according to Duncan test. GR, glutathione reductase; MT, melatonin; POD, peroxidase; SOD, superoxide dismutase.

Figure 9.

Simplified conclusion for the influence of exogenous MT on growth, RWC, EL and antioxidants enzymes of lettuce grown under NaCl treatments. EL, electrolyte leakage; GR, glutathione reductase; MDA, malondialdehyde; MT, melatonin; POD, peroxidase; RWC, relative water content; SOD, superoxide dismutase.
Simplified conclusion for the influence of exogenous MT on growth, RWC, EL and antioxidants enzymes of lettuce grown under NaCl treatments. EL, electrolyte leakage; GR, glutathione reductase; MDA, malondialdehyde; MT, melatonin; POD, peroxidase; RWC, relative water content; SOD, superoxide dismutase.
DOI: https://doi.org/10.2478/fhort-2024-0001 | Journal eISSN: 2083-5965 | Journal ISSN: 0867-1761
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Language: English
Page range: 1 - 17
Submitted on: Sep 30, 2023
Accepted on: Dec 22, 2023
Published on: Feb 5, 2024
Published by: Polish Society for Horticultural Sciences (PSHS)
In partnership with: Paradigm Publishing Services
Publication frequency: 2 issues per year
Keywords:
abiotic stress,
free radicals,
exogenous MT,
L.,
foliar application,
productivity,
vegetative growth
Related subjects:
Life sciences,
Plant science,
Zoology,
Ecology,
Life sciences, other

© 2024 Hemat A. EL-Bauome, Samar M. Doklega, Said A. Saleh, Ahmed S. Mohamed, Ahmad A. Suliman, Mahmoud A.M. Abd El-Hady, published by Polish Society for Horticultural Sciences (PSHS)
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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