在干旱胁迫条件下，二甲双胍作为一种新型有机叶面生物刺激剂可促进花生（Arachis hypogaea L.）生长并提高产量。

Metformin as a novel organic foliar bio-stimulant to enhance peanut (Arachis hypogaea L.) growth and yield under drought stress conditions.

作者信息

Qotb Marwa A, Abdelhamid Ismail A, Habashy Nader R, Al Tawaha Abdel Rahman Mohammad, Al-Tawaha Abdel Razzaq, Karnwal Arun, Malik Tabarak

机构信息

Soils, Water and Environment Research Institute, Agriculture Research Center, Giza, Egypt.

Department of Chemistry, Faculty of Science, Cairo University, Giza, 12613, Egypt.

出版信息

BMC Plant Biol. 2025 Jul 17;25(1):918. doi: 10.1186/s12870-025-06925-9.

DOI:10.1186/s12870-025-06925-9

PMID:40676513

Abstract

BACKGROUND

Drought stress significantly affects peanut (Arachis hypogaea L.) growth and yield, necessitating strategies to enhance crop resilience. This study evaluates the impact of foliar-applied Metformin, gibberellic acid (GA₃), and indole-3-acetic acid (IAA) at concentrations of 5.0, 7.5, and 10.0 mg L⁻ under different irrigation regimes (100%, 80%, and 60% of the recommended irrigation rate).

METHODS

A two-year field experiment was conducted under arid conditions to assess the effects of these treatments on plant growth, yield, photosynthetic pigments, nutrient uptake, and water use efficiency (WUE). Peanut plants were exposed to three irrigation levels (100%, 80%, and 60%), and foliar treatments were applied at specific growth stages. Photosynthetic parameters, including chlorophyll and carotenoid content, were measured alongside growth and yield attributes to determine treatment efficacy.

RESULTS

The application of Metformin at 7.5 mg L⁻ under 80% irrigation significantly improved plant height (76.9 cm), branch number (17.7 per plant), fresh weight (2928.5 kg acre⁻), dry biomass (329.1 kg acre⁻), and total seed yield (1593.9 kg acre⁻) compared to other treatments. Additionally, water use efficiency (WUE) increased by 50.8% in plants treated with Metformin at 7.5 mg L⁻ under 80% irrigation compared to untreated plants. The highest chlorophyll content (1.27 mg g⁻ FW) and carotenoid levels (2.87 mg g⁻ FW) were observed with Metformin at 7.5 mg L⁻ under 100% irrigation, indicating improved photosynthetic performance.

CONCLUSION

Foliar application of Metformin at 7.5 mg L⁻ under 80% irrigation effectively enhances peanut growth, yield, and WUE, providing a sustainable strategy to mitigate drought stress effects. This treatment balances crop productivity and water conservation, making it a viable approach for peanut cultivation in water-limited environments.

摘要

背景

干旱胁迫显著影响花生（Arachis hypogaea L.）的生长和产量，因此需要采取策略来增强作物的抗逆性。本研究评估了在不同灌溉制度（推荐灌溉量的100%、80%和60%）下，叶面喷施浓度为5.0、7.5和10.0 mg L⁻的二甲双胍、赤霉素（GA₃）和吲哚-3-乙酸（IAA）的影响。

方法

在干旱条件下进行了为期两年的田间试验，以评估这些处理对植物生长、产量、光合色素、养分吸收和水分利用效率（WUE）的影响。花生植株接受三种灌溉水平（100%、80%和60%），并在特定生长阶段进行叶面处理。测量光合参数，包括叶绿素和类胡萝卜素含量，以及生长和产量属性，以确定处理效果。

结果

与其他处理相比，在80%灌溉条件下喷施7.5 mg L⁻的二甲双胍显著提高了株高（76.9 cm）、分枝数（每株17.7个）、鲜重（2928.5 kg acre⁻）、干生物量（329.1 kg acre⁻）和总种子产量（1593.9 kg acre⁻）。此外，与未处理植株相比，在80%灌溉条件下喷施7.5 mg L⁻二甲双胍的植株水分利用效率（WUE）提高了50.8%。在100%灌溉条件下喷施7.5 mg L⁻二甲双胍时，叶绿素含量最高（1.27 mg g⁻ FW），类胡萝卜素水平最高（2.87 mg g⁻ FW），表明光合性能得到改善。