Lysophospholipids (LPLs) represent a major class of polar lipids crucial for rice’s nutritional and functional properties. This study investigates the impact of varying storage temperatures (20, 30, and 40 °C) and humidity (50 and 95%) on the nonstarch and starch LPLs of paddy and milled rice. The findings revealed that the average nonstarch LPL content in paddy rice aged at 20 °C (82.6 μg/g) and 40 °C (83.6 μg/g) was significantly lower than that at 30 °C (95.0 μg/g). The nonstarch LPL content of milled rice aged at 20 °C (78.0 μg/g) was significantly higher than that at 30 and 40 °C. High storage temperature (40 °C) and humidity (95%) resulted in a significant reduction in rice total starch LPC and LPE content when compared to low humidity (50%). The ratio of rice starch/nonstarch LPL components such as LPC16:0 and LPC18:2 remarkably increased with increased storage temperature and humidity.

中文翻译：

---

人工老化对水稻溶血磷脂的影响


溶血磷脂 (LPL) 是一类主要的极性脂质，对于大米的营养和功能特性至关重要。本研究调查了不同的储存温度（20、30 和 40°C）和湿度（50% 和 95%）对水稻和精米的非淀粉和淀粉 LPL 的影响。结果表明，20℃熟成稻米的平均非淀粉LPL含量（82.6μg/g）和40℃熟成（83.6μg/g）显着低于30℃熟成的水稻（95.0μg/g）。 20℃陈化的精米中非淀粉LPL含量（78.0μg/g）显着高于30℃和40℃陈化的精米。与低湿度（50%）相比，高储存温度（40°C）和湿度（95%）导致大米总淀粉LPC和LPE含量显着降低。随着储存温度和湿度的增加，大米淀粉/非淀粉 LPL 组分（如 LPC16:0 和 LPC18:2）的比例显着增加。