| ROS | reactive oxygen species |
| ROP | Rho of plants |
| MnTMPP | Mn-5,10,15,20-tetrakis(1-methyl-4-pyridyl)21H,23H-porphin |
| CMS | cytoplasmic male sterility |
| DPI | diphenyl iodonium chloride |
| NBT | nitro blue tetrazolium |
| SOD | superoxide dismutase |
| NOX | NADPH-oxidase |
| MP | membrane potential |
| PAO | polyamine oxidase |
| DPI | diphenyleneiodonium (NOX inhibitor) |