| BR | brassinosteroid |
| CC | companion cell |
| CHER1 | CHOLINE TRANSPORTER-LIKE 1 |
| DAPI | 4′,6-diamidino-2-phenylindole |
| PBS | phosphate-buffered saline |
| qPCR | quantitative polymerase chain reaction |
| SE | sieve element |
| SEL | size exclusion limit |
| SUC2 | SUCROSE-PROTON SYMPORTER 2 |
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