Mitigation of salinity stress in sunflower plants (Helianthus annuus L.) through topical application of salicylic acid and silver nanoparticles
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Tarih
2024
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Springer Science and Business Media LLC
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
Salinity stress poses a significant threat to sunflower (Helianthus annuus L.) by impairing water and nutrient uptake, disrupting cellular functions, and increasing oxidative damage. This study investigates the impact of Salicylic acid (SA) and silver nanoparticles (AgNPs) on growth, biochemical parameters, and oxidative stress markers in salt-stressed sunflower plants. Experiments were conducted in a controlled greenhouse environment at the Islamia University of Bahawalpur, Pakistan, using sunflower seeds (Orisun 701). AgNPs were synthesized using neem leaf extract and characterized through SEM, FTIR, zeta potential analysis, and XRD. Treatments included foliar application of SA (10 mM) and AgNPs (40 ppm) under 100 mM sodium chloride-induced salt stress. Growth metrics, antioxidant enzyme activities, chlorophyll content, and oxidative stress markers (H2O2 and MDA levels) were measured to evaluate treatment effects. The SA and AgNP treatments improved sunflower growth under salt stress, with AgNPs showing a greater impact. SA increased shoot fresh weight by 16.4%, root fresh weight by 6.9%, and chlorophyll content by 12.7%, while AgNPs enhanced shoot fresh weight by 30.5%, root fresh weight by 11.6%, and total chlorophyll by 80%. AgNPs also significantly reduced H2O2 by 42.7% and MDA by 34.6%, indicating reduced oxidative damage. Cluster analysis further demonstrated the distinct physiological responses elicited by AgNPs compared to SA. SA and AgNPs enhance sunflower resilience to salinity, with AgNPs showing a particularly strong effect on chlorophyll content and oxidative stress markers. These findings highlight the potential of SA and AgNPs as effective treatments for salt stress, suggesting further research across different crops and environments.
Açıklama
Anahtar Kelimeler
Antioxidant enzymes, Cluster analysis, Ionic imbalances, Photosynthetic pigments, Salinity effects
Kaynak
Physiology and Molecular Biology of Plants
WoS Q Değeri
Q1
Scopus Q Değeri
Q2
Cilt
Sayı
Künye
Shahbaz, M., Anwar, T., Fatima, S., Onursal, N., Qureshi, H., Qureshi, W. A., ... & Zaman, W. (2024). Mitigation of salinity stress in sunflower plants (Helianthus annuus L.) through topical application of salicylic acid and silver nanoparticles. Physiology and Molecular Biology of Plants, 1-14.
