| BS | brassinosteroid |
| ETR | electron transport rate |
| Fv/Fm | maximal quantum yields of PSII |
| HBL | 28-homobrassinolide |
| HCS | 28-homocastasterone |
| POD | peroxidase |
| qL | coefficients of photochemical quenching based on the “lake” model |
| qP | coefficients of photochemical quenching based on the “puddle” model |
| SOD | superoxide dismutase |
| TBARS | complex between thiobarbituric acid and thiobarbituric acid-reactive substances |
| TF | translocation factor |
| Y(NO) | quantum yields of nonregulated energy dissipation |
| Y(NPQ) | quantum yields of and regulated energy dissipation |
| Y(II) | effective quantum yields of PSII |