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Combating Salinity Through Natural Plant Extracts Based Biostimulants: A Review
Ali Ahmad1, Begoña Blasco1, Vanessa Martos1,2
1Department of Plant Physiology, University of Granada, Granada, Spain.
Frontiers in Plant Science
|June 7, 2022
Summary
Plant extracts (PEs) offer an eco-friendly solution to mitigate salt stress in crops, enhancing growth and yield by modulating plant signaling and redox systems. Further research using omics approaches is needed to fully elucidate their mechanisms.
Area of Science:
- Agricultural Science
- Plant Physiology
- Environmental Science
Background:
- Abiotic stresses, particularly salt stress, significantly limit crop production, contributing to a substantial yield gap.
- Salinity induces ionic, osmotic, and oxidative stress, leading to metabolic disruptions and reduced crop growth and yield.
- Chemical fertilizers contribute to environmental pollution, necessitating sustainable alternatives in agriculture.
Purpose of the Study:
- To review the role of natural plant extracts (PEs) in mitigating salt stress in crops.
- To explore the sources, preparation methods, and modes of action of PEs.
- To highlight the physiological changes induced by PEs in plants under salinity.
Main Methods:
- Literature review on the application and effects of plant extracts in mitigating salt stress.
- Analysis of bioactive compounds in PEs and their impact on plant physiology.
- Discussion of potential future research directions using transcriptomics, proteomics, metabolomics, and bioinformatics.
Main Results:
- Plant extracts (PEs) are rich in bioactive compounds that regulate redox metabolism, promoting plant growth and yield under salt stress.
- PEs enhance salt tolerance by modulating signaling pathways (e.g., Ca2+ sensors) and redox machinery (e.g., antioxidant enzymes).
- Factors such as plant growth stage, dosage, and application method influence the efficacy of PEs.
Conclusions:
- Plant extracts (PEs) represent an ecological and economical strategy to improve crop salt tolerance and yield.
- PEs offer a sustainable alternative to chemical fertilizers, reducing environmental pollution.
- Further research is needed to fully elucidate the explicit mode of action of PEs for optimizing their application.
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