Horticulture Department, Faculty of Agriculture, Fayoum University, Fayoum, Egypt.
Soil and Water Department, Faculty of Agriculture, Fayoum University, Fayoum, Egypt.
Environ Sci Pollut Res Int. 2024 May;31(22):32464-32479. doi: 10.1007/s11356-024-33295-w. Epub 2024 Apr 23.
Raising soil contamination with cadmium (Cd) and salinization necessitates the development of green approaches using bio-elicitors to ensure sustainable crop production and mitigate the detrimental health impacts. Two field trials were carried out to study the individual and combined effects of foliage spraying of Moringa leaf extract (MLE) and soil application of effective microorganisms (EMs) on the physio-biochemical, osmolytes, antioxidants, and performance of sweet potato grown in Cd-contaminated salty soil (Cd = 17.42 mg kg soil and soil salinity ECe = 7.42 dS m). Application of MLE, EMs, or MLE plus EMs significantly reduced the accumulation of Cd in roots by 55.6%, 50.0%, or 68.1% and in leaves by 31.4%, 27.6%, or 38.0%, respectively, compared to the control. Co-application of MLE and EMs reduced Na concentration while substantially raising N, P, K, and Ca acquisition in the leaves. MLE and EMs-treated plants exhibited higher concentrations of total soluble sugar by 69.6%, free proline by 47.7%, total free amino acids by 29.0%, and protein by 125.7% compared to the control. The enzymatic (SOD, APX, GR, and CAT) and non-enzymatic (phenolic acids, GSH, and AsA) antioxidants increased in plants treated with MLE and/or EMs application. Applying MLE and/or EMs increased the leaf photosynthetic pigment contents, membrane stability, relative water content, water productivity, growth traits, and tuber yield of Cd and salt-stressed sweet potato. Consequently, the integrative application of MLE and EMs achieved the best results exceeding the single treatments recommended in future application to sweet potato in saline soil contaminated with Cd.
由于土壤镉（Cd）污染和盐渍化问题，需要开发绿色方法，利用生物激发子来确保可持续的作物生产，并减轻其对健康的不利影响。进行了两项田间试验，以研究叶喷辣木叶提取物（MLE）和土施有效微生物（EMs）对在 Cd 污染盐渍土壤（Cd = 17.42 mg kg 土壤和土壤电导率 ECe = 7.42 dS m）中生长的甘薯的生理生化、渗透物、抗氧化剂和性能的单独和联合影响。与对照相比，MLE、EMs 或 MLE 加 EMs 的应用分别使根系中 Cd 的积累减少了 55.6%、50.0%或 68.1%，叶片中 Cd 的积累减少了 31.4%、27.6%或 38.0%。MLE 和 EMs 的共同应用降低了 Na 浓度，同时大大提高了叶片中 N、P、K 和 Ca 的吸收。与对照相比，MLE 和 EMs 处理的植物的总可溶性糖浓度增加了 69.6%，游离脯氨酸增加了 47.7%，游离氨基酸总量增加了 29.0%，蛋白质增加了 125.7%。与对照相比，叶片中 SOD、APX、GR 和 CAT 等酶（SOD、APX、GR 和 CAT）和非酶（酚酸、GSH 和 AsA）抗氧化剂的浓度增加。MLE 和/或 EMs 的施用增加了 Cd 和盐胁迫甘薯叶片的光合色素含量、膜稳定性、相对含水量、水分生产率、生长特性和块茎产量。因此，MLE 和 EMs 的综合应用取得了最佳效果，超过了未来在 Cd 污染盐渍土壤中种植甘薯的单一处理推荐。
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