TY  - JOUR
AU  - Duplii, Nadezhda G.
AU  - Azarin, Kirill V.
AU  - Usatov, Alexander V.
AU  - Plotnikov, Andrey A.
AU  - Rani, Ritu
AU  - Rajput, Vishnu D.
PY  - 2025
DA  - 2025/07/22
TI  - Effects of Plastoquinone Derivative 10-(6'-Plastoquinonyl) Decyltriphenylphosphonium on Rice Seeds Grown under Complete Flooding Conditions
JO  - OBM Genetics
SP  - 305
VL  - 09
IS  - 03
AB  - The present work aimed to study the effects of 10-(6'-plastoquinonyl) decyltriphenylphosphonium (SkQ1) on rice (Oryza sativa) plants germinating under flooding conditions. The influence of different concentrations of SkQ1 (mitochondria-targeted antioxidant) on resistance to complete flooding was assessed on rice seedlings of the Kuboyar variety. The total level of reactive oxygen species (ROS), H2O2-induced chemiluminescence, and gene expression of antioxidant enzymes (OsSODA (superoxide dismutase A), OsSODB (superoxide dismutase B), OsCATA (catalase A), OsCATB (catalase B), OsCATC (catalase C), OsAPX1 (ascorbate peroxidase)), as well as indexes of germination, fresh and dry weight of roots and shoots, were determined. The plastoquinone derivative SkQ1 increased the submergence (hypoxia) tolerance of rice seedlings at nanomolar concentrations. The results indicated that SkQ1 protects rice seedlings by maintaining redox homeostasis. ROS content in seedlings revealed that the introduction of SkQ1 in nanomolar (10-9 M and 10-8 M for the shoot and 10-9 M for the root) concentrations led to a decrease in the total level of oxygen radicals compared to the control. On the other hand, a further increase in SkQ1 concentration induced a dose-dependent increase in the amount of ROS in plant tissues, which indicates its pro-oxidant activity. The 10-5 M SkQ1 increased the ROS content in the root by 2.8 times compared to the control, and by 5.1 times compared to normoxia. At a concentration of 10-5 M, SkQ1 exhibits pro-oxidant activity, expressed in the suppression of shoot growth and almost blocked root development. Thus, SkQ-type compounds are promising for use in agriculture as universal protectors and growth stimulants for sustainable development.
SN  - 2577-5790
UR  - https://doi.org/10.21926/obm.genet.2503305
DO  - 10.21926/obm.genet.2503305
ID  - Duplii2025
ER  -