Bibliographic Details
| Title: |
Manipulating Light Conditions for Enhanced Growth and Improved Phytochemical Composition in Peppermint: Uncovering the Nuances. |
| Authors: |
Mohsenpour, Mona, Azizi, Ali, Sarikhani, Hassan, Seyedi, Forouh Sadat, Pourhosseini, Seyyed Hossein |
| Source: |
International Journal of Horticultural Science & Technology; Jan2026, Vol. 13 Issue 1, p131-146, 16p |
| Subject Terms: |
BLUE light, PEPPERMINT, ULTRAVIOLET radiation, OXIDANT status, LIGHTING, ESSENTIAL oils, PHYTOCHEMICALS, GREENHOUSE gardening |
| Abstract (English): |
This study examined the effects of supplemental blue and UV-A light on the growth, phytochemical composition, and essential oil (EO) production of peppermint (Mentha × piperita L.) under greenhouse conditions. Plants were subjected to four lighting treatments using LEDs: natural light (control), UV-A, blue light, and a combination of UV-A and blue light. Blue light significantly increased leaf area (391.78 mm²) and shoot fresh weight (48.78 g), while the combined UV-A and blue light treatment enhanced total chlorophyll (2.03 mg g -1 FW) and carotenoid content (0.46 mg g-1 FW). UV-A light alone improved antioxidant capacity (38.34% inhibition) and flavonoid content (32.78 mg g-1 DW), but decreased both leaf area (253.42 mm2) and shoot fresh weight (33.35 g). Phytochemical analysis showed that blue light produced the highest EO yield (1.84% w/w), whereas the combined UV-A and blue light treatment resulted in the lowest (1.13% w/w). Gas chromatography-mass spectrometry (GC-MS) analysis revealed that blue light increased the concentrations of menthone (18.62-24.30%) and menthofuran (2.32-2.63%) but reduced menthol content. The highest menthol levels were found in the control (41.20%) and the combined UVA + blue light treatment (37.45%). Significant positive correlations (r² > 0.50) were observed among antioxidant activity, menthone, total carotenoids, and flavonoids, underscoring the interconnected roles of these compounds in stress response and secondary metabolism. Overall, the findings demonstrate that light spectrum manipulation can be an effective strategy for optimizing peppermint growth, phytochemical profile, and EO production. Blue light improves biomass and EO yield, while UV-A enhances antioxidant capacity and secondary metabolite accumulation. However, combining UV-A and blue light may compromise EO yield, suggesting the importance of fine-tuning light regimes to achieve desired trade-offs between yield and quality in peppermint cultivation. [ABSTRACT FROM AUTHOR] |
| Abstract (Arabic): |
المقال يركز على تأثيرات تعديل ظروف الإضاءة، وبشكل خاص الضوء الأزرق الإضافي والأشعة فوق البنفسجية من النوع A، على نمو وتركيب الفيتوكيميائيات في النعناع (Mentha × piperita L.) المزروع في البيوت الزجاجية. وجدت الدراسة أن الضوء الأزرق عزز بشكل كبير مساحة الأوراق ووزن الأجزاء الخضرية الطازجة، بينما حسنت مجموعة الأشعة فوق البنفسجية من النوع A والضوء الأزرق محتوى الكلوروفيل الكلي والكاروتينات. ومع ذلك، فإن الأشعة فوق البنفسجية من النوع A وحدها زادت من القدرة المضادة للأكسدة ومحتوى الفلافونويد لكنها قللت من مساحة الأوراق ووزن الأجزاء الخضرية. تشير النتائج إلى أن تحسين أطياف الضوء يمكن أن يعزز بشكل فعال نمو النعناع وإنتاج الزيت العطري، مما يبرز أهمية إدارة الإضاءة المخصصة في الزراعة في البيئات المسيطر عليها. [Extracted from the article] |
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| Database: |
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