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EFFECT OF LIGHT QUALITY ON MORPHOLOGY AND ANTI-OXIDANT CONTENT OF RED LEAF LETTUCE

机译:光质对红叶生菜形态和抗氧化含量的影响

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Lactuca sativa cv. Outredgeous was grown under either fluorescent lamps or light emitting diodes (LEDs) to test the hypothesis that anti-oxidant potential could be regulated by light quality. Red leaf lettuce was grown at 300 umol m~(-2) s~(-1) of photosynthetically active radiation (PAR), 1200 mu mol mol~(-1) CO_2,23 deg C, and an 18h light /6 hr dark photoperiod in controlled environment chambers. The LED treatments were selected to provide different amounts of red (640 nm), blue (440 nm), green (530 nm) and far red (730 nm) light in the spectra. Total anthocyanin content and the oxygen radical absorbance capacity (ORAC) of the tissue were measured at harvest. The source of light had a dramatic effect on both plant growth and production of radioprotective compounds. LED's resulted in 50% greater bioprotectant content per plant at the same light level over triphosphor fluorescent lamps. Blue LED's (440 nm) appeared to regulate the pathways leading to increased concentration of bioprotective compounds in leaf tissue. LED lighting induced a number of effects on morphology that increased both accumulation of bioprotective compounds and total yield.
机译:Lactuca sativa cv。在荧光灯或发光二极管(LED)下的葡萄抛光以测试抗氧化剂潜力可以通过轻质质量来调节假设。红叶莴苣在300 uolm〜(-2)s〜(-1)的光合作用辐射(par),1200 mol mol〜(-1)co_2,23℃,18h光/ 6小时受控环境室中的暗光周期。选择LED处理以在光谱中提供不同量的红色(640nm),蓝色(440nm),蓝色(440nm),绿色(530nm)光(730nm)光。在收获时测量组织的总青少年素含量和氧自由基吸光度(ORAC)。光源对植物生长和辐射保护化合物的产生具有显着影响。 LED在三龙膦荧光灯相同的光线水平下,每株植物的50%更高的生物保护剂含量。蓝色LED的(440nm)似乎调节途径,导致叶组织中的生物保护化合物的浓度增加。 LED照明诱导了多种对形态的影响,增加了生物保护化合物的累积和总收率。

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