Strigolactone decreases cadmium concentrations by regulating cadmium localization and glyoxalase defense system: Effects on nodules organic acids and soybean yield

To decrease environmental and human health risks associated with crop and soil contamination, alternative solutions are still needed. The information on strigolactones (SLs)-mediated elicitation of abiotic stress signaling and triggering physiological alterations is scarce in the plant. To unravel t...

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Veröffentlicht in:Chemosphere (Oxford) 2023-09, Vol.335, p.139028-139028, Article 139028
Hauptverfasser: Shah, Tariq, Asad, Muhammad, Khan, Zeeshan, Amjad, Khadija, Alsahli, Abdulaziz Abdullah, D'amato, Roberto
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Sprache:eng
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Zusammenfassung:To decrease environmental and human health risks associated with crop and soil contamination, alternative solutions are still needed. The information on strigolactones (SLs)-mediated elicitation of abiotic stress signaling and triggering physiological alterations is scarce in the plant. To unravel the same, soybean plants were subjected to cadmium (Cd) stress (20 mg kg−1), presence or absence of foliar applied SL (GR24) at the concentration of 10 μM. Excess Cd accumulation causes reduced growth (−52% shoot and +24% root), yield (−35%), physio-biochemical markers, organic acid production, and genes encoding heavy metal resilience in soybean. SL exogenous application decreased the growth and yield suppression (−12%), shielded chlorophyll (+3%), and prominently declined Cd-induced oxidative stress biomarkers accumulation in soybean. Moreover, SL effectively alleviates Cd-induced suppression in organic acids, superoxide dismutase (+73%), catalase activities (+117%), and increments ascorbate glutathione (ASA-GSH) cycle activities comprising ascorbate peroxidase, glutathione peroxidase, glutathione reductase, dehydroascorbate reductase, and monodehydroascorbate reductase. SL-mediated upregulation of genes encoding heavy metals tolerance and glyoxalase defense system in Cd stressed plants. The results of this work point out that SL could be a promising player in mitigating Cd-induced injuries effectively in soybean. It acts through the antioxidant system modulation for redox homeostasis, shielding chloroplasts, enhancing photosynthetic apparatus, and elevating organic acid production in soybean plants. [Display omitted] •Strigolactone (SL) mitigated cadmium (Cd)-induced toxicity in soybean.•SL maintained balance between oxidative stress biomarkers and antioxidant enzymes.•Application of SL enhanced organic acids production and reduced Cd accumulation.•Upregulation of genes encoding heavy metal ATPase observed in SL sprayed plants.
ISSN:0045-6535
1879-1298
DOI:10.1016/j.chemosphere.2023.139028