Department of Postharvest Technology, School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, Bangkok, Thailand.
Department of Postharvest Technology, School of Bioresources and Technology, King Mongkut's University of Technology Thonburi, Bangkok, Thailand.
J Photochem Photobiol B. 2023 Nov;248:112788. doi: 10.1016/j.jphotobiol.2023.112788. Epub 2023 Sep 22.
This study determined the effects of supplemental light-emitting diode (LED) treatments on the nutrient quality and volatile compounds of sweet basil leaves during stimulated shelf-life. Basil plants were grown in a greenhouse under different supplemental LEDs (white, blue, red, or red + blue each at 100 μmol m s), while plants grown under sunlight served as the control. The findings revealed that plant height and canopy of basil showed a significant increase under red LED irradiation, while the leaf area was improved by the blue LED exposure. Moreover, blue LEDs enhanced the levels of phenolic compounds, total phenolic contents, total flavonoid contents, and PAL (phenylalanine ammonia-lyase) activity in harvested sweet basil leaves. Additionally, red + blue LEDs lighting stimulated the production of volatile compounds. During storage, the samples treated with blue LEDs maintained a higher quality compared to the control samples. In conclusion, the application of blue or red + blue LEDs prior to harvest can be beneficial for promoting and preserving the nutritional quality of sweet basil.
本研究旨在确定补充发光二极管（LED）处理对货架期内甜罗勒叶片营养品质和挥发性化合物的影响。罗勒植物在温室中生长在不同的补充 LED（白色、蓝色、红色或红色+蓝色，每种均为 100 μmol m s）下，而在阳光下生长的植物作为对照。研究结果表明，红 LED 辐射下罗勒的株高和冠层显著增加，而蓝 LED 暴露则改善了叶片面积。此外，蓝 LED 提高了收获的甜罗勒叶片中酚类化合物、总酚含量、总黄酮含量和 PAL（苯丙氨酸解氨酶）活性。此外，红+蓝 LED 照明刺激了挥发性化合物的产生。在贮藏过程中，用蓝 LED 处理的样品与对照样品相比保持更高的质量。总之，收获前应用蓝或红+蓝 LED 处理可以促进和保持甜罗勒的营养品质。
