The Physiological and Biochemical Effects of Drought Stress on Sheep Sorrel (Rumex acetosella L.)

Yıl 2025, Cilt: 21 Sayı: 2, 340 - 351, 30.12.2025

Seda Şahin , Hülya Torun

https://doi.org/10.58816/duzceod.1811852

https://izlik.org/JA48NJ69XH

Öz

Sheep sorrel (Rumex acetosella L.) is an herbaceous plant belonging to the Polygonaceae family, known for its sour taste. Its leaves are consumed as food and valued in the health sector for their medicinal properties, giving the plant significant ethnobotanical importance. This study aimed to investigate the effects of drought stress on water availability, membrane stability, biomass, and the antioxidant defense system in sheep sorrel plants. The relative growth rate, water content, osmotic potential, lipid peroxidation levels, hydrogen peroxide concentration, and activities of antioxidant defense enzymes—including superoxide dismutase (SOD), peroxidase (POX), catalase (CAT), ascorbate peroxidase (APX), and glutathione reductase (GR)—were measured. Drought stress caused decreases in relative growth rate, water content, and osmotic potential in sheep sorrel plants. Additionally, significant increases in lipid peroxidation and hydrogen peroxide levels were observed. Conversely, chlorophyll fluorescence levels were maintained under drought stress, and simultaneous increases in CAT, APX, POX, GR, and SOD enzyme activities indicate an effective antioxidant defense response in the plant.

Anahtar Kelimeler

Sheep sorrel , Rumex acetosella , drought stress , antioxidant defense

Kuzukulağı (Rumex acetosella L.) Bitkisinde Kuraklık Stresinin Fizyolojik ve Biyokimyasal Etkileri

https://izlik.org/JA48NJ69XH

Öz

Kuzukulağı (Rumex acetosella L.), Polygonaceae familyasına ait, ekşi tadı ile bilinen otsu bir bitkidir. Yaprakları gıda olarak tüketilir ve tıbbi özellikleri nedeniyle sağlık sektöründe değerlidir; bu da bitkiye önemli bir etnobotanik önem kazandırır. Bu çalışma, kuraklık stresinin kuzukulağı bitkilerinde su mevcudiyeti, membran stabilitesi, biyokütle ve antioksidan savunma sistemi üzerindeki etkilerini araştırmayı amaçlamıştır. Nisbi büyüme oranı, su içeriği, ozmotik potansiyel, lipid peroksidasyon seviyeleri, hidrojen peroksit konsantrasyonu ve süperoksit dismutaz (SOD), peroksidaz (POX), katalaz (CAT), askorbat peroksidaz (APX) ve glutatyon redüktaz (GR) dahil olmak üzere antioksidan savunma sistemi enzimlerinin aktiviteleri ölçülmüştür. Kuraklık stresi, kuzukulağı bitkilerinde nisbi büyüme oranı, su içeriği ve ozmotik potansiyelde azalmaya neden olmuştur. Ayrıca, lipid peroksidasyon ve hidrojen peroksit seviyelerinde önemli artışlar gözlenmiştir. Diğer taraftan, klorofil floresan seviyeleri kuraklık stresi altında korunurken, CAT, APX, POX, GR ve SOD enzim aktivitelerinde eşzamanlı artışlar, bitkide etkili bir antioksidan savunma tepkisi olduğunu göstermektedir.

Anahtar Kelimeler

Kuzukulağı , Rumex acetosella , kuraklık stresi , antioksidan savunma

Kaynakça

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