This research measured the optical absorption (µa) and reduced scattering (μs') properties in peaches during quality deterioration, and determine the relationships of the optical parameters with select structural and biochemical parameters. Spatially resolved reflectance was measured for healthy and fungal infected peaches, followed by physical (the size and tissue color), structural [membrane permeability and SEM], and biochemical (Vc, soluble sugar, titratable acid, chlorophyll, total phenolic content) measurements. Both µa and µs' were correlated well with the cellulosic structural and biochemical parameters of peaches, and they had the best correlations with those quality parameters at 675 nm. The correlation of μs' with membrane permeability was the highest from -0.962-0.743, while μa had the best correlation with the chlorophyll content at 675 nm which is an indicator of plant maturation and senescence. These findings would be useful for further development of an effective optical technique for early disease detection of peach fruit.

中文翻译：

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使用空间分辨漫反射技术评估具有真菌感染的桃的光学特性，及其与组织结构和生化特性的关系。

这项研究测量了质量恶化期间桃中的光吸收（µa）和减少的散射（μs'）特性，并确定了光学参数与所选结构和生化参数之间的关系。测量了健康和真菌感染的桃子的空间分辨反射率，然后进行了物理（大小和组织颜色），结构[膜通透性和SEM]以及生化（Vc，可溶性糖，可滴定酸，叶绿素，总酚含量）的测量。µa和µs'与桃的纤维素结构和生化参数相关性很好，并且在675 nm下与这些质量参数具有最佳相关性。μs'与膜渗透率的相关性最高，为-0.962-0.743，而μa与675nm处的叶绿素含量具有最佳的相关性，这是植物成熟和衰老的指标。这些发现将有助于进一步开发一种有效的光学技术，以早期检测桃果实的疾病。