Melatonin priming enhances maize seedling drought tolerance by regulating the antioxidant defense system. (Record no. 54176)

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control field MX-MdCICY
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control field 20250625162442.0
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Transcribing agency CICY
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Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) B-20071
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Title Melatonin priming enhances maize seedling drought tolerance by regulating the antioxidant defense system.
490 0# - SERIES STATEMENT
Volume/sequential designation Plant physiology, p.kiad027, 2023
520 3# - SUMMARY, ETC.
Summary, etc. Drought stress (DS)challenges sustainable agriculture production by limiting crop growth and development. The objective of the study was to evaluate the effect of melatonin-priming on enzymatic and non-enzymatic antioxidant defense mechanisms and its relation with leaf ultrastructure and stomatal traits in maize (Zea mays L)seedlings under DS (PEG-6000). DS drastically decreased seed germination, plant growth, and leaf chlorophyll content due to excessive reactive oxygen species (ROS)production. Melatonin-priming significantly (P < 0.05)increased seed germination, root length, shoot length, fresh seedling weight, proline content, total soluble protein content, sugar content, chlorophyll content, and stomatal aperture size by 101 percent, 30 percent, 133 percent, 51 percent, 22 percent, 59 percent, 54 percent, 20 percent, and 424 percent, compared to no priming (NP)under DS, respectively. Similarly, priming improved leaf ultrastructure and reduced the amount of chlorophyll loss and oxidative damage in maize seedlings. Melatonin seed priming with 500 µM melatonin (M2)greatly increased superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), glutathione, and ascorbate (AsA)activity, by 65 percent, 63 percent, 94 percent, 41 percent, and 55 percent compared to NP under DS and by 0.26 percent, 8 percent, 33 percent, 42 percent, and 15 percent under no-stress (NS), respectively. Melatonin-priming also reduced malondialdehyde content, electrolyte leakage, hydrogen peroxide (H2O2)content, and superoxide anion (?O?2?)content by 26 percent, 31 percent, 31 percent, and 33 percent compared to NP under DS and by 8 percent, 18 percent, 10 percent, and 11 percent under NS, respectively. In response to DS, melatonin-priming also stabilized the chloroplast structure, sustained cell expansion, protected cell walls, and greatly improved stomatal traits, including stomatal number, length, and width. Our results suggest that melatonin-priming improves drought tolerance in maize seedlings by alleviating the negative effect of ROS.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Muhammad, I.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Yang, L.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Ahmad, S.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Farooq, S.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Khan, A.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Muhammad, N.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Zhou, X. B.
856 40 - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier <a href="https://drive.google.com/file/d/1yX5FNbhiGKpH7zYmyugRfi-FxG1vZvs9/view?usp=drivesdk">https://drive.google.com/file/d/1yX5FNbhiGKpH7zYmyugRfi-FxG1vZvs9/view?usp=drivesdk</a>
Public note Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx
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  Clasificación local     Ref1 CICY CICY Documento préstamo interbibliotecario 25.06.2025   B-20071 25.06.2025 25.06.2025 Documentos solicitados