Quantifying Lily Scale Browning Index

The surface color change of scales was estimated using a colorimeter (Model CR-400, Minolta, Tokyo, Japan), which showed the L*, a* and b* values by CIE color. The colorimeter was calibrated using a standard white tile (L* = 97.40, a* = −0.91, b* = 1.53).
The browning index (BI), which represents the purity of brown color (Palou et al., 1999), was calculated according to the following equation. Fresh lily scale as reference scale was shown in Figure A1.

BI = \frac{100 (x - 0 . 31)}{0 . 172}, where x = \frac{a + 1.75 L}{5.645 L + a - 3.012 b}

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Zhang H., Wu X., Liu X., Yao Y., Liu Z., Wei L., Hou X., Gao R., Li Y., Wang C, & Liao W. (2023). Hydrogen Gas Improves the Postharvest Quality of Lanzhou Lily (Lilium davidii var. unicolor) Bulbs. Plants, 12(4), 946.

Publication 2023

Model CR-400

Lily

Corresponding Organization :

Other organizations : Gansu Agricultural University

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Variable analysis

independent variables

None explicitly mentioned

dependent variables

Surface color change of scales, represented by L*, a*, and b* values
Browning index (BI)

control variables

Standard white tile used for calibration of the colorimeter (L* = 97.40, a* = -0.91, b* = 1.53)
Fresh lily scale as the reference scale

controls

Positive control: Fresh lily scale as the reference scale
No negative control mentioned

Annotations

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