Table 3.
Relative activity of ethylene and its analogs in pea straight growth bioassay test
| Gases | Formula | ppm (μl l−1) in gas phase for half-maximum activity |
|---|---|---|
| Ethylene | C2H4 | 0.1 |
| Propylene | C3H6 | 10 |
| Vinyl chloride | C2H3Cl | 140 |
| Carbon monoxide | CO | 270 |
| Acetylene | C2H2 | 280 |
| Vinyl fluoride | C2H3F | 430 |
| Methyl acetylene (Propyne) | C3H4 | 800 |
| Vinyl bromide | C2H3Br | 1,600 |
| Allene (Propadiene) | C3H4 | 2,900 |
| Vinyl methyl ether | C3H6O | 10,000 |
| Ethyl acetylene (1-butyne) | C4H6 | 11,000 |
| 1-Butene | C4H8 | 27,000 |
| Vinyl ethyl ether | C4H8O | 30,000 |
| Carbon dioxide | CO2 | 30,000 |
| 1, 3-Butadiene | C4H6 | 500,000 |