In other fruit the zeaxanthin concentration reportedly increased or remained stable. For example in mandarin (C. unshiu) stored at 5°, 20°, or 30 °C for 21 days, zeaxanthin concentrations increased early at 30 °C, and later at 20 °C. No change was found at 5 °C (Matsumoto et al., 2009). Storage of kumquat (Fortunella japonica) fruit for 21 days at 17 °C had no effect on zeaxanthin (Schirra et al., 2008). Very little seems reported on lutein concentrations. During the experiment of Schirra et al. (2008) on kumquat storage the lutein concentration decreased.
Ethephon has been widely used as a replacement for ethylene treatment in agriculture (Abeles et al., 1992). Treatment with ethephon, thus with exogenous ethylene, did not affect the parameters studied with the exception of an increase in the amount of measured ethylene, and a very small hastening effect on firmness decrease.