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Table 1 Effects of different concentrations of ethephon (2-chloroethyl phosphonic acid) applied at 30 d after sowing on the activity of 1-aminocyclopropane carboxylic acid synthase (ACS; (ng ACC kg-1 leaf (FM) s-1) and ethylene evolution (ng kg-1 leaf (FM) s-1) in two cultivars of mustard (Brassica juncea) at 15 d after the treatment. Values ± SE. Data followed by the same letter within a column are significantly not different.

From: An evaluation of the effects of exogenous ethephon, an ethylene releasing compound, on photosynthesis of mustard (Brassica juncea) cultivars that differ in photosynthetic capacity

Ethephon Treatments (mM) High photosynthetic capacity cultivar (Varuna) Low photosynthetic capacity cultivar (RH 30)
  ACS Ethylene ACS Ethylene
0 62.2 ± 5.4c 3.8 ± 0.2c 40.8 ± 3.6c 2.4 ± 0.2c
0.75 64.6 ± 5.8c 4.4 ± 0.3bc 44.4 ± 4.0c 3.2 ± 0.2bc
1.5 68.2 ± 5.8b 5.8 ± 0.3b 52.8 ± 4.6b 4.2 ± 0.3b
3.0 73.5 ± 6.0a 7.0 ± 0.5a 62.3 ± 5.6a 6.0 ± 0.4a