Effects of UV-B radiation on tetraspores of Chondrus ocellatus Holm(Rhodophyta),and effects of red and blue light on repair of UV-B-induced damage

We evaluated the effects of red and blue light on the repair of UV-B radiation-induced damage in tetraspores of Chondrus ocellatus Holm. Tetraspores of C. ocellatus were treated with different UV-B radiation levels(0,36,72,108,144 and 180 J/m2),and thereafter subjected to PAR,darkness,or red or blue light during a 2-h repair stage,each day for 48 days. The diameters and cellular contents of cyclobutane pyrimidine dimmers(CPDs),chlorophyll a(Chl a),phycoerythrin,and UV-B-absorbing mycosporinelike amino acids(MAAs) contents of the tetraspores were determined. Our results show that low doses of UV-B radiation(36 and 72 J/m 2) promoted the growth of C. ocellatus; however,increased UV-B radiation gradually reduced the C. ocellatus growth(greater than 72 J/m2). The MAAs(palythine and asterina-330) in C. ocellatus were detected and analyzed by LC/MS. Our results suggest that moderate red light could induce the growth of this alga in aquaculture. In addition,photorepair was inhibited by red light,so there may be some other DNA repair mechanism activated by red light. Blue light promoted the activity of DNA photolyase,greatly improving remediation efficiency. Red and blue lights were found to reduce the capacity of C. ocellatus to form MAAs. Therefore,PAR,red light,and blue light play different roles during the repair processes for damage induced by UV-B radiation.

Supplemental blue and red light promote lycopene synthesis in tomato fruits

Lycopene, one of the strongest natural antioxidants known and the main carotene in ripe tomato, is very important for human health. Light is well known to be one of the most important environmental stimuli influencing lycopene biosynthesis; specifically, red light induces higher lycopene content in tomato. However, whether blue light promotes lycopene synthesis remains elusive and exactly how light stimulation promotes lycopene synthesis remains unclear. We applied supplemental blue and red lighting on tomato plants at anthesis to monitor the effect of supplemental blue and red lighting on lycopene synthesis. Our results showed that supplemental blue/red lighting induced higher lycopene content in tomato fruits; furthermore, we found that the expression of key genes in the lycopene synthesis pathway was induced by supplemented blue/red light. The expression of light signaling components, such as red-light receptor phytochromes(PHYs), blue-light receptor cryptochromes(CRYs) and light interaction factors, phytochrome-interacting factors(PIFs) and ELONGATED HYPOCOTYL 5(HY5) were up-or down-regulated by blue/red lighting. Thus, blue and red light increased lycopene content in tomatoes by inducing light receptors that modulate HY5 and PIFs activation to mediate phytoene synthase 1(PSY1) gene expression. These results provide a sound theoretical basis for further elucidation of the light regulating mechanism of lycopene synthesis in tomatoes, and for instituting a new generation of technological innovations for the enhancement of lycopene accumulation in crop production.

Effects of Different Combinations of Red and Blue Light on Morphology and Photosynthetic Characteristic of Tomato Seedlings

Blue and red light are spectral wavelengths more effective for plants. The effects of different ratios of red and blue light （R/B=2, R/B=4, R/B=8, R/B=12） provided by LEDs on morphology and photosynthetic characteristics of tomato seedlings were studied. The results showed that plant height, stem diameter, fresh weight, dry weight, seedling index and G value increased with the increase of R/B ratio until 8. On the contrary, SPDA value decreased with the increase of R/B ratio. Photosynthetic characteristics were measured by CO 2 assimilation （ Pn ）, stomatal conductance （ gs ） and intracellular CO 2 concentration （ Ci） . Pn and gs decreased with the increase of R/B ratio. Furthermore, similar trend was investigated in photochemical quenching （qP） and electron transport rate （ETR）. Results of this study suggest that compared with white LED, appropriate combination of red and blue light can enhance plant growth and photosynthetic characteristics, and the optimal blue/red ratio for tomato growth was R/B=8.

Transcriptome analysis reveals effects of red and blue lightemitting diodes(LEDs)on the growth,chlorophyll fluorescence and endogenous plant hormones of potato(Solanum tuberosum L.)plantlets cultured in vitro

Red and blue light illumination has been reported to significantly affect plantlet growth.Potato is an important food and feed crop in the world and potato plantlet cultured in vitro plays an important role in potato production.However,few studies have documented the effects of red and blue light on the growth of potato plantlets revealed at the transcriptome level.The objective of this study was to determine the growth and physiological responses of potato plantlets cultured in vitro under monochromatic red(RR),monochromatic blue(BB)as well as combined red and blue(RB)LEDs using the RNA-Seq technique.In total,3150 and 814 differentially expressed genes(DEGs)were detected in potato plantlets under RR and BB,respectively,compared to RB(used as control).Compared to the control,the DEGs enriched in"photosynthesis"and"photosynthesis-antenna proteins"metabolic pathways were up-regulated and down-regulated by BB and RR,respectively,which might be responsible for the increases and decreases of maximum quantum yield(F_(v)/F_(m)),photochemical quantum yield(φ_(PSII)),photochemical quenching(q_(P))and electron transfer rate(ETR)in BB and RR,respectively.Potato plantlets exhibited dwarfed stems and extended leaves under BB,whereas elongated stems and small leaves were induced under RR.These dramatically altered plantlet phenotypes were associated with variable levels of endogenous plant hormones gibberellin(GAs),indoleacetic acid(IAA)and cytokinins(CKs),as assessed in stems and leaves of potato plantlets.In addition,monochromatic red and blue LEDs trigged the opposite expression profiles of DEGs identified in the"plant hormone signal transduction"metabolic pathway,which were closely related to the endogenous plant hormone levels in potato plantlets.Our results provide insights into the responses of potato plantlets cultured in vitro to red and blue LEDs at the transcriptomic level and may contribute to improvements in the micro-propagation of potato plantlets cultured in vitro from the light spectrum aspect.

Transcriptome analysis of carotenoid biosynthesis in Dunaliella salina under red and blue light

The quality of light is an important abiotic factor that affects the growth and development of photosynthetic organisms.In this study,we exposed the unicellular green alga Dunaliella salina to red(660 nm)and blue(450 nm)light and analyzed the cell growth,total carotenoid content,and transcriptomes.The growth of D.salina was enhanced by illumination with red light,whereas blue light was not able to promote the algal growth.In contrast,the total carotenoid content increased under both red and blue light.The RNA of D.salina was sequenced and the transcriptomic response of algal cells to red and blue light was investigated.Six transcripts encoding for the blue light receptor cryptochrome were identified,and transcripts involved in the carotenoid metabolism were up-regulated under both red and blue light.Transcripts encoding for photoprotective enzymes related to the scavenging of reactive oxygen species were up-regulated under blue light.The present transcriptomic study provides a more comprehensive understanding of carotenoid biosynthesis in D.salina under different wavelengths of light.

Blue-Red Tuning Emission of ZnO: Europium Quantum Dots with Different Excitation Wavelengths

Optoelectronic applications require the development of new fluorescent and efficient luminescent materials, free of toxicity, low in cost, and easy to produce. In this way the synthesis of zinc-oxide (ZnO) quantum dots (QDs) has recently received special attention due to their good optical, electrical and chemical properties with low production costs and blue light emission. In this work ZnO QDs were successfully doped with europium in order to obtain a tunable emission luminescence from blue emission of ZnO to red emission of europium as a function of wavelength excitation. Results show an efficient blue to red tuning when the excitation wavelength was changed from 317 nm to 395 nm, respectively. This opens the possibility of having new optical devices to produce different color emission using the same material.

不同波长LEDs光源对苦荞芽菜生长、生物活性物积累及抗氧化活性的影响

为探究不同波长LEDs光源对苦荞芽菜生长的影响,本研究以黑暗(D)作对照,采用单色红(R)、蓝(B)、绿(G)光源培养苦荞芽菜,收获后分别测定其形态指标、生物活性物积累量、类黄酮合成关键基因表达量及抗氧化活性指标,结果表明:B处理的苦荞芽菜下胚轴呈深红色,伸长生长受到强烈抑制,花青素、总黄酮及总酚积累量均最高,分别是D的7.18、2.96和2.49倍;R处理的下胚轴呈浅粉色,上述3种生物活性物积累量分别是对照的2.56、1.68和1.40倍;G处理的下胚轴伸长与R相似,外观呈透明白色,生物活性物积累量与对照无显著差异。B和R均强烈诱导类黄酮生物合成通路上关键结构基因表达,显著增加苦荞芽菜下胚轴抗氧化活性。此外,各单色光处理均未显著影响苦荞芽菜可食用部位的鲜重。由此可见,红、蓝LEDs光源可显著影响苦荞芽菜形态生长,并增加其生物活性物积累及抗氧化能力,以蓝光最佳。

红蓝光促进陆地棉愈伤组织诱导和增殖

【目的】陆地棉(Gossypium hirsutum)的遗传转化技术存在转化周期长、转化效率低等问题,其中,愈伤组织增殖速度慢是导致棉花转化周期长的关键因素。探究陆地棉愈伤组织增殖的最适光照条件,为缩短棉花转化周期提供技术基础。【方法】以陆地棉受体品种WC的下胚轴为外植体诱导愈伤组织,设置红光、蓝光、红蓝光(1﹕1)和白光(CK)4种不同光照处理,研究不同光质下愈伤组织的增殖速度、形态特征,以及相关基因表达水平和相关酶活性的差异,解析光照对愈伤组织增殖的影响并获得最优光照条件。【结果】不同光质对诱导棉花外植体出愈和愈伤组织生长具有明显影响。在4种不同光照处理下,红蓝光相较其他光质具有更显著地促进外植体出愈和愈伤组织增殖的效果,表现为愈伤组织分化时间更短,7—15 d,即与其他处理存在明显表型差异,7 d愈伤组织鲜重红蓝光(0.39 g)>蓝光(0.34 g)>白光(0.24 g)>红光(0.23 g),15 d时,红蓝光(1.15 g)>蓝光(0.98 g)>白光(0.69 g)>红光(0.51 g),红蓝光照射下的愈伤组织鲜重是白光对照的1.65倍,比单一蓝光或红光照射下的愈伤组织鲜重增加16.5%或125.5%;与此相一致的是,红蓝光处理下,第二周的愈伤增殖率也最高,达14.67%,比红光处理(7.17%)增加1倍多。4种光质下,愈伤增殖及体胚再生相关基因的表达量,红蓝光处理均显示最高。此外,红蓝光处理下愈伤组织的过氧化氢酶(CAT)活性显著提高,活性氧(ROS)含量低于白光对照。【结论】不同光质条件下,棉花外植体的愈伤组织增殖速度不同,红蓝光(1﹕1)促进外植体出愈和愈伤增殖表现最优,其次为蓝光,再次为白光,单独的红光不利于棉花出愈和愈伤增殖。红蓝光(1﹕1)处理诱导光受体及其互作因子、愈伤增殖等相关基因的表达,增强愈伤组织内过氧化氢酶的活性,降低活性氧含量,促进细胞分裂,进而促进愈伤增殖。

铈红与钴蓝对聚乙烯棚膜红/蓝光质调控及性能影响

红/蓝光质调控聚乙烯(PE)棚膜一直以来是农膜行业亟需解决的难题。在PE中引入铈红(CeS)和钴蓝(CoO·Al_(2)O_(3)),通过吹塑工艺制备PE红/蓝光棚膜。光电雾度仪测试结果发现CeS和CoO·Al_(2)O_(3)对PE棚膜的透光率影响较小,但雾度和散光度有所增加;光纤光谱仪和手持式光谱照度仪表征结果显示CeS和CoO·Al_(2)O_(3)明显提升450~520 nm的蓝光和605~700 nm的红光透过率,且CeS与CoO·Al_(2)O_(3)质量比为1∶2时,红光透过率为39.2%,蓝光透过率为38.1%,红/蓝光透过比例为1.03;万能拉伸试验机测试结果发现CeS与CoO·Al_(2)O_(3)可改善PE棚膜的力学性能,其中拉伸强度较空白样提升约5.5%,断裂伸长率提升约16.8%,直角撕裂强度提升约3%,穿刺强度提升约21.8%;差示扫描量热仪表征结果显示添加CeS与CoO·Al_(2)O_(3)可提升PE氧化诱导期(Oit)达45 min以上,PE具有良好的耐热老化性能。上述测试表征结果表明:CeS与CoO·Al_(2)O_(3)的引入可明显提升PE棚膜的散光性能、力学性能、耐热稳定性能、红/蓝光透过率及透过比例。此外,可通过调控CeS与CoO·Al_(2)O_(3)的质量比获得不同红/蓝光质调控的PE功能棚膜。

LED红蓝光配比对番茄生长和光合的影响

以番茄品种‘普罗旺斯’为材料,在双拱钢架日光温室内进行人工补光试验,设置T1(2R3B,即红光/蓝光珠数配比R:B=2:3)、T2(4R1B)、T3(6R1B)、T4(7R1B)四组红蓝光处理,以不进行人工补光为对照(CK),探究温室番茄生长和光合响应最优的红蓝光配比。结果表明,在T1处理下35d后,番茄的株高、SPAD、蒸腾速率(Tr)和光化学淬灭系数(qP)较对照组分别显著提高26.7%、19.6%、107.6%和34.3%。在T3处理下35d后,番茄的茎粗、花朵数、净光合速率(Pn)、胞间CO_(2)浓度(Ci)、气孔导度(Gs)、实际光化学效率(ΦPSⅡ)和电子传输速率(ETR)较对照组分别显著提高26.9%、38.6%、133.7%、5.9%、183.3%、31.3%和30.9%。在T4处理下35d后,最大光化学效率(Fv/Fm)较对照组分别显著提高4.0%。在对设施番茄进行不同配比红蓝光补光处理下,较对照组可显著促进番茄的生长及光合作用,在本试验设置的2R3B、4R1B、6R1B、7R1B四组红蓝组合光处理中,6R1B(红/蓝光珠数配比R:B=6:1)处理下各项指标表现的综合效果最佳,可为温室番茄栽培LED补光提供一定的理论指导。

红蓝光联合系统药物治疗带状疱疹的安全性及有效性分析

目的利用Meta分析观察红蓝光联合系统药物治疗带状疱疹的临床有效性和安全性。方法检索the Cochrane Library、EMbase数据库、Pubmed数据库、中国生物医学文献数据库、CNKI(China national knowledge infrastructure)数据库、维普数据库、万方数据库,纳入红蓝光联合系统药物治疗带状疱疹的随机对照治疗(randomized controlled trial,RCT),并进行方法学质量评价,采用RevMan 5.4软件进行统计分析。结果8篇RCT文献纳入本项研究,累计病例1240例。Meta分析结果显示红蓝光联合系统药物治疗带状疱疹总有效率(OR=4.92,95%CI:2.95~8.21,P<0.00001)、痊愈率(OR=2.17,95%CI:1.66~2.85,P<0.00001)、水疱消退时间(MD=-1.16,95%CI:-1.33~-0.98,P<0.00001)、结痂时间(MD=-1.47,95%CI:-1.80~-1.14,P<0.00001)、疼痛缓解时间(MD=-2.05,95%CI:-2.54~-1.56,P<0.00001)效果明显优于单纯使用基础药物组,差异有统计学意义(P<0.05)。结论红蓝光联合系统药物治疗带状疱疹疗效确切,优于系统药物组,是光电联合药物治疗带状疱疹的有效方法。

植物工厂LED光质调控对芹菜生长及产量的影响

为探讨植物工厂中不同光质对芹菜生长的影响,本研究选用4种不同红蓝光配比的LED光源开展试验。结果表明,红光∶蓝光=3∶1的光质配比下,芹菜株高、茎粗、叶片数、单株鲜重、干重、地上部干重和地下部干重均最大,有利于芹菜的营养生长;红光∶蓝光=3∶1的光质配比可提高芹菜叶绿素含量,促进光合作用,提高光能转化率;红光∶蓝光=3∶1的光质配比有利于芹菜壮苗培育和产量的提高。综合各指标表明,红光∶蓝光=3∶1是适于植物工厂芹菜生长的光质配比。

红蓝光联合维A酸乳膏治疗儿童痤疮疗效观察

目的:探讨红蓝光联合0.025%维A酸乳膏治疗儿童痤疮的临床疗效和不良反应。方法:选择医院收治的40例痤疮患儿为研究对象,根据治疗方案不同随机分为两组,每组各20例患儿。对照组患儿给予0.025%维A酸乳膏治疗,观察组患儿在此基础上联合红蓝光照射治疗。比较两组患儿痤疮治疗的有效率以及不良反应发生率。结果:观察组患儿的治疗总有效率高于对照组,差异有统计学意义(P=0.027);观察组患儿出现2例不良反应,对照组患儿出现4例不良反应,两组差异无统计学意义(P=0.658)。结论:红蓝光联合维A酸乳膏治疗儿童痤疮,安全且有效,值得在临床中推广应用。

红蓝光照射联合藻酸盐敷料对肛周脓肿术后创面的愈合作用

目的 评价红蓝光照射联合藻酸盐敷料对肛周脓肿术后创面的愈合作用。方法 选取2021年1月至2022年12月浙江大学医学院附属第二医院临平院区行一次性根治术的肛周脓肿患者106例,按照随机数字表法将其分为对照组和研究组,每组53例。对照组采用常规护理及健康宣教,术后创面使用藻酸盐敷料换药治疗;研究组在对照组基础上加用红蓝光照射创面治疗。比较两组术后第1、7、14天疼痛、创面分泌物渗出、肉芽组织生长、伤口愈合时间、焦虑自评量表(SAS)、舒适度评分等变化情况。结果 两组疼痛评分整体分析发现,时间和分组存在交互作用(P<0.05);单独效应检验结果显示,不同时间点组间、组内比较,差异有统计学意义(P<0.05)。两组创面渗液评分和肉芽组织生长评分整体分析发现,时间与分组无交互作用(P>0.05);单独效应检验结果显示,不同时间点组间、组内比较,差异有统计学意义(P<0.05)。与对照组比较,研究组患者创面愈合时间明显缩短(P<0.05)。两组治疗前后SAS评分和舒适状况评分比较,差异有统计学意义(P<0.05)。结论 红蓝光照射联合藻酸盐敷料能减少肛周脓肿术后分泌物渗出,加快创面肉芽生长,促进创面愈合,减少疼痛及焦虑情绪,提高患者舒适度和生活质量,值得临床推广应用。

Effect of Light Quality on Photosynthesis and Chlorophyll Fluorescence in Strawberry Leaves

The photosynthetic characteristics of strawberry (Fragariaananassa Duch. cv. Toyonoka)leaves under illumination of identical light intensity(55-57% natural light) withdifferent light quality were studied. It was showed that the chlorophyll content,maximal photochemical efficiency of PSⅡ(Fv/Fm), Fm/Fo, amount of inactive PSⅡreactioncenters (Fi-Fo) and rate of QA reduction were positively correlated with the red-light/blue-light ratios, but the chlorophyll (a/b) ratios were negatively correlated withthem. Carotenoid content of the leaves was maximum under the blue film, than under greenfilm, red film, white film and yellow film, and negatively correlated with the red/far-red ratios. The apparent quantum yield (AQY), photorespiratory rate (Pr) and carboxylationefficiency (CE) were also strongly affected by light quality. The photosynthetic rate(Pn) in strawberry leaves under green film was significantly lower than under all otherfilm. Our results suggested that light quality is an essential factor regulating thedevelopment of PSⅡ, and phytochrome and an independent blue light photoreceptor,possibly a cryptochrome, can regulate photosynthetic performance.

Effects of different light conditions on repair of UV-B-induced damage in carpospores of Chondrus ocellatus Holm

We evaluated the effects of ultraviolet-B(UV-B) radiation and different light conditions on the repair of UV-B-induced damage in carpospores of C hondrus ocellatus Holm(Rhodophyta) in laboratory experiments. Carpospores were treated daily with different doses of UV-B radiation for 48 days,when vertical branches had formed in all treatments; after each daily treatment,the carpospores were subjected to photosynthetically active radiation(PAR),darkness,red light,or blue light during a 2-h repair stage. Carpospore diameters were measured every 4 days. We measured the growth and cellular contents of cyclobutane pyrimidine dimers(CPDs),chlorophyll a,phycoerythrin,and UV-B-absorbing mycosporine-like amino acids(MAAs) in carpospores on Day 48. Low doses of UV-B radiation(36 and 72 J/m 2) accelerated the growth of C. ocellatus. However,as the amount of UV-B radiation increased,the growth rate decreased and morphological changes occurred. UV-B radiation significant damaged DNA and photosynthetic pigments and induced three kind of MAAs,palythine,asterina-330,and shinorine. PAR conditions were best for repairing UV-B-induced damage. Darkness promoted the activity of the DNA darkrepair mechanism. Red light enhanced phycoerythrin synthesis but inhibited light repair of DNA. Although blue light,increased the activity of DNA photolyase,greatly improving remediation efficiency,the growth and development of C. ocellatus carpospores were slower than in other light treatments.

红蓝光质调控烟苗根系发育的机理研究

【目的】探究红蓝光质调控烟苗根系发育的机理。【方法】以烤烟品种翠碧1号为试材,采用水培试验,研究红蓝光对烟草幼苗根系生长、内源气体信号分子硫化氢(H2S)合成和积累的影响。【结果】处理7 d时,与对照白光处理相比,结果表明:(1)红光处理烟苗地上部和根系生物量显著增加,增幅分别为74.62%和15.64%,蓝光根系生物量降幅为7.00%;(2)红光处理烟苗根系H2S含量显著增加,增幅为61.72%,而蓝光处理显著降低;(3)红光处理烟苗根系脱巯基酶(DES)、半胱氨酸合成酶(CS)活性分别升高24.28%、25.61%;蓝光处理则分别降低32.10%、18.30%;(4)红光处理的H2S生物合成关键基因NtDES表达量为白光处理的8.8倍,蓝光处理仅为白光处理的13.82%。【结论】红光处理可通过增强H2S生物合成关键酶编码基因的表达提高烟苗根系H2S的含量,进而促进侧根的发生,而蓝光效应与红光相反。

Study of Plant Cultivation Using a Light-Emitting Diode Illumination System to Control the Spectral Irradiance Distribution

In plant cultivation, the number of photons is more important than the light energy from the chemical reactions that occur during photosynthesis. In addition, the blue and red photon flux (B/R) ratio is an important parameter for plant cultivation. Here we discuss the effect of the spectral irradiance distribution and the B/R ratio on plant cultivation. We cultivated lettuce seedlings, Lactuca sativa L. Cv. Okayama, using a light-emitting diode illumination system that can precisely control the spectral irradiance distribution and B/R ratio. The B/R ratio varied from 0.36 to 2.06 according to the intensity of the blue light when the photosynthetic photon flux density values were sufficient to ensure the 150 - 200?&mu;mol&sdot;m&minus;2&sdot;s&minus;1.?High photon flux densities of blue light result in reduced plant length, plant height, and leaf area, thereby suggesting its role in the suppression of leaf growth. Therefore, we conclude that a lower photon flux of blue light (B/R Ratio) is optimal for lettuce cultivation.

痤疮清除术联合红蓝光治疗仪在面部痤疮中临床应用

目的分析与探讨痤疮清除术与红蓝光治疗仪应用在临床治疗寻常痤疮(Acnevulgaris,AV)中的价值。方法将2020.7-2022.11我院收治的80例面部痤疮患者为研究对象,随机将入选者分成对照组(n=40,痤疮清除术治疗)和观察组(n=40,痤疮清除术联合红蓝光治疗仪治疗),对比评价组间临床疗效及免疫功能。结果经对比可见观察组疗效(97.50%)明显高于对照组82.50%,数据差异明显(P<0.05);观察组患者心理(焦虑状态、抑郁状态)评分均低于对照组(P<0.05);接受干预前组间Leeds评分数据对比无明显数据差异(P>0.05),经干预观察组Leeds评分(2.02±0.19)明显低于对照组,数据差异明显(P<0.05)。讨论临床为面部痤疮患者实施痤疮清除术与红蓝光治疗仪联合治疗,临床疗效确切,明显改善临床症状,患者心理负担得到缓解,值得推广。

不同红蓝光配比对番茄叶片和产量品质的影响

[目的]本文主要探讨不同红蓝光配比对番茄叶片和产量品质的影响,为LED光源在番茄生产上的应用提供理论依据。[方法]本试验以番茄品种008为试验材料,试验设红蓝光配比不同的4个补光处理A1(R∶B=4∶1)、A2(R∶B=2∶3)、A3(R∶B=6∶1)、A4(R∶B=7∶1),以正常自然光照,即不补光为对照CK。测定不同红蓝光配比下番茄的叶片数量及形态变化、单株产量、维生素C、有机酸、可溶性糖以及可溶性固形物的含量指标。[结果]在A1、A2、A3、A4与CK处理相比下,A3可以有效提高番茄产量、番茄品质以及改变其叶片数量和形态。A3与CK处理相比单果重最重,为82.36 g,单株产量最高,为8.21 kg;A3处理的维生素C含量与CK相比显著提高了7.03%,有机酸与CK相比显著提高了38.93%,4个补光处理的可溶性固形物与CK相比都有提高,分别提高60.46%、68.82%、59.87%、26.16%;番茄叶片通过不同红蓝光配比处理28 d后,A3处理番茄叶片数相比CK增长30片,同时在叶片形态上,A1的叶片颜色相比CK最深,A2和A4叶柄相比CK更粗,A3的叶片相比CK更厚,同时经过处理后A1和A3的叶面积相比CK较大,因此LED红蓝光补光处理可以一定程度下改变叶片的形态。[结论]综上,LED红蓝光配比不同能够对番茄叶片、果实产量、品质起到显著的增加效果,其中LED光源下红蓝光配比为6∶1时增强效果最佳,为番茄在栽培过程中进行补光时提供一定的指导。