Enhancing rice productivity in wastewater-irrigated saline Cd-contaminated soils using microbial-nanoparticle synergy
文献类型： 外文期刊
作者： Hafez, Emad M. 1 ; Gao, Yan 2 ; La, Honggui 4 ; Alharbi, Khadiga 5 ; Hamada, Maha M. 6 ; Omara, Alaa El-Dein 7 ; Alshaal, Tarek 8 ;
作者机构： 1.Kafrelsheikh Univ, Fac Agr, Dept Agron, Kafr Al Sheikh 33516, Egypt
2.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Nanjing 210014, Peoples R China
3.Minist Agr & Rural Affairs Peoples Republ China, Key Lab Agroenvironm Downstream Yangze Plain, Nanjing 210014, Peoples R China
4.Nanjing Agr Univ, Coll Life Sci, Nanjing 210095, Jiangsu, Peoples R China
5.Princess Nourah bint Abdulrahman Univ, Coll Sci, Dept Biol, POB 84428, Riyadh 11671, Saudi Arabia
6.Ain Shams Univ, Fac Agr, Agron Dept, Cairo 11566, Egypt
7.Agr Res Ctr, Soils Water Environm Res Inst, Dept Microbiol, Giza 12112, Egypt
8.Univ Debrecen, Fac Agr & Food Sci & Environm Management, Inst Appl Plant Biol, H-4032 Debrecen, Hungary
9.Kafrelsheikh Univ, Fac Agr, Soil & Water Sci Dept, Kafr Al Sheikh 33516, Egypt
关键词： Saline Cd-contaminated soil; Soil remediation; Rice productivity; Antioxidant enzymes; Sustainable agriculture; Food safety
期刊名称：ENVIRONMENTAL TECHNOLOGY & INNOVATION （ 影响因子：7.1； 五年影响因子：7.1 ）
ISSN： 2352-1864
年卷期： 2025 年 39 卷
页码：
收录情况： SCI
摘要： Soil salinity and cadmium (Cd) contamination pose significant threats to agricultural productivity and food security, particularly in rice-growing regions. This study investigates the synergistic effects of plant growth-promoting rhizobacteria (PGPRs) (Pseudomonas koreensis, Bacillus coagulans, and Pseudomonas stutzeri) and selenium nanoparticles (SeNPs) in remediating saline Cdcontaminated soils and enhancing rice (Oryza sativa L.) performance. Over two consecutive growing seasons (2022-2023), the combined application of PGPRs and SeNPs significantly improved soil health, reducing soil pH from 8.50 to 8.02 and electrical conductivity (ECe) from 5.97 to 4.01 dS m-1 , while increasing soil organic matter (SOM) by 6.5 % and cation exchange capacity (CEC) by 25.6 %. The treatment also reduced soil Cd content by 34.6 %, from 0.81 to 0.53 mg kg-1 , and decreased Cd accumulation in rice roots, shoots, and seeds by 56.7 %, 65.0 %, and 50.0 %, respectively, ensuring safer rice grain production. Furthermore, SeNPs significantly enhanced selenium (Se) content in rice shoots and seeds, with Se levels increasing from 0.55 to 1.47 mu g g-1 in shoots and from 0.01 to 0.51 mu g g-1 in seeds, highlighting their role in improving rice nutritional quality. Physiological analyses revealed enhanced photosynthetic pigment concentrations, with chlorophyll a increasing by 112.3 % and carotenoids by 213.6 %, alongside a 101.9 % increase in superoxide dismutase (SOD) activity under the combined treatment. These improvements translated into a 25.0 % increase in grain yield, from 5.76 to 7.24 ton ha-1 , and a 21.4 % increase in 1000-grain weight. The findings highlight the efficacy of PGPRs and SeNPs in mitigating oxidative stress, improving nutrient uptake, reducing Cd toxicity, and enhancing rice productivity under combined salinity and Cd stress. This study provides a novel, eco-friendly
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