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Elicitation effect of hydrogen eroxide to enhance tolerance of Taxodium distichum (L.) Rich. seedlings irrigated with saline water

文献类型： 外文期刊

作者： El-Sayed, Samah M. 1 ; Mohamed, Amr S. 2 ; Mazhar, Azza A. M. 1 ; Chen, Yongdui 3 ;

作者机构： 1.Natl Res Ctr, Agr & Biol Res Inst, Ornamental Plants & Woody Trees Dept, Giza, Egypt

2.Agr Res Ctr, Bot Gardens Res Dept, Hort Res Inst, Giza, Egypt

3.Yunnan Acad Agr Sci, Biotechnol & Germplasm Resources Inst, Key Lab South Crop Gene Resources & Germplasm Inno, Yunnan Prov Key Lab Agr Biotechnol,Minist Agr & Ru, Kunming 650205, Yunnan, Peoples R China

关键词： abiotic stress; antioxidant enzyme; bioactive components; hydrogen peroxide; peroxidase; salinity; salt resistance index; molecule; systemic acquired resistance; Taxodium distichum

期刊名称：NOTULAE BOTANICAE HORTI AGROBOTANICI CLUJ-NAPOCA （ 影响因子：1.3； 五年影响因子：1.5 ）

ISSN： 0255-965X

年卷期： 2025 年 53 卷 1 期

页码：

收录情况： SCI

摘要： Because of the scarcity of fresh water and its limited availability for human use, some places have resorted to utilizing alternative water sources, such as saline water, which negatively impacts plant growth and development. Hydrogen peroxide (H2O2) signalling molecule, aids in plant defence as a signal in the production of systemic acquired resistance and modulating ROS detoxification and regulating multiple stressresponsive pathways and gene expression. Our study suggests that using H2O2 as a stimulating substance to boost the production of antioxidant compounds in plants resulting in enhanced growth. During the 2022 and 2023 seasons, we used H2O2 as a foliar application at concentrations (0, 20, 40, 60, and 80 mM) on Taxodium distichum seedlings receiving saline water at concentrations (0, 3000, 5000, and 7000 ppm). The results indicated that applying H2O2 at 20 mM enhanced most of growth attributes and lowered the production of proline, lipid peroxidation (MDA), and improved the accumulation of chlorophyll a and b which suggests that plants Irrigated with this concentration were able to handle all of the salt levels. Compared to other treatments, applying a H2O2 at 40 mM treatment resulted in the highest plant Salt Resistance Index (SRI%) and root growth parameters. Carotenoids, flavonoids, phenols, and sugars in the plant reached peak production when treated with a 60 mM of H2O2, regardless of salinity concentrations. The activity of peroxidase (POD) as an antioxidant isoenzyme increased as the salinity and H2O2 concentrations increased. The treatment with salinity at 7000 ppm+ H2O2 at 60 or 80 mM showed the maximum number of bands and the greatest intensity of

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