Investigating the influence of varied ratios of red and far-red light on lettuce (Lactuca sativa): effects on growth, photosynthetic characteristics and chlorophyll fluorescence

IF 4.1 2区生物学 Q1 PLANT SCIENCES

Frontiers in Plant Science Pub Date : 2024-09-10 DOI:10.3389/fpls.2024.1430241

Xueting Bi, Hong Xu, Chaowei Yang, Haoran Zhang, Wei Li, Wei Su, Mingtao Zheng, Bingfu Lei

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引用次数: 0

Abstract

Far red photon flux accelerates photosynthetic electron transfer rates through photosynthetic pigments, influencing various biological processes. In this study, we investigated the impact of differing red and far-red light ratios on plant growth using LED lamps with different wavelengths and Ca1.8Mg1.2Al2Ge3O12:0.03Cr3+ phosphor materials. The control group (CK) consisted of a plant growth special lamp with 450 nm blue light + 650 nm red light. Four treatments were established: F1 (650 nm red light), F2 (CK + 730 nm far-red light in a 3:2 ratio), F3 (650 nm red light + 730 nm far-red light in a 3:2 ratio), and F4 (CK + phosphor-converted far-red LED in a 3:2 ratio). The study assessed changes in red and far-red light ratios and their impact on the growth morphology, photosynthetic characteristics, fluorescence characteristics, stomatal status, and nutritional quality of cream lettuce. The results revealed that the F3 light treatment exhibited superior growth characteristics and quality compared to the CK treatment. Notably, leaf area, aboveground fresh weight, vitamin C content, and total soluble sugar significantly increased. Additionally, the addition of far-red light resulted in an increase in stomatal density and size, and the F3 treatments were accompanied by increases in net photosynthetic rate (Pn), transpiration rate (Tr), intercellular CO2 concentration (Ci), and stomatal conductance (Gs). The results demonstrated that the F3 treatment, with its optimal red-to-far-red light ratio, promoted plant growth and photosynthetic characteristics. This indicates its suitability for supplementing artificial light sources in plant factories and greenhouses.

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研究不同比例的红光和远红光对莴苣（Lactuca sativa）的影响：对生长、光合特性和叶绿素荧光的影响

远红光光通量通过光合色素加速光合电子传递速率，影响各种生物过程。在本研究中，我们使用不同波长的 LED 灯和 Ca1.8Mg1.2Al2Ge3O12:0.03Cr3+ 磷光材料，研究了不同红光和远红光比例对植物生长的影响。对照组（CK）由一盏植物生长专用灯组成，其波长为 450 nm 蓝光 + 650 nm 红光。共设立了四个处理：F1（650 纳米红光）、F2（CK + 730 纳米远红光，比例为 3:2）、F3（650 纳米红光 + 730 纳米远红光，比例为 3:2）和 F4（CK + 荧光粉转化的远红 LED，比例为 3:2）。研究评估了红光和远红光比例的变化及其对奶油生菜的生长形态、光合特性、荧光特性、气孔状态和营养质量的影响。结果表明，与 CK 处理相比，F3 光处理的生长特性和质量更优。值得注意的是，叶面积、地上部鲜重、维生素 C 含量和总可溶性糖显著增加。此外，远红光的加入导致气孔密度和大小增加，F3 处理的净光合速率（Pn）、蒸腾速率（Tr）、细胞间 CO2 浓度（Ci）和气孔导度（Gs）也随之增加。结果表明，F3 处理具有最佳的红-远红光比，能促进植物生长和光合特性。这表明它适合作为植物工厂和温室人工光源的补充。

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来源期刊

Frontiers in Plant Science PLANT SCIENCES-

CiteScore

7.30

自引率

14.30%

发文量

4844

审稿时长

14 weeks

期刊介绍： In an ever changing world, plant science is of the utmost importance for securing the future well-being of humankind. Plants provide oxygen, food, feed, fibers, and building materials. In addition, they are a diverse source of industrial and pharmaceutical chemicals. Plants are centrally important to the health of ecosystems, and their understanding is critical for learning how to manage and maintain a sustainable biosphere. Plant science is extremely interdisciplinary, reaching from agricultural science to paleobotany, and molecular physiology to ecology. It uses the latest developments in computer science, optics, molecular biology and genomics to address challenges in model systems, agricultural crops, and ecosystems. Plant science research inquires into the form, function, development, diversity, reproduction, evolution and uses of both higher and lower plants and their interactions with other organisms throughout the biosphere. Frontiers in Plant Science welcomes outstanding contributions in any field of plant science from basic to applied research, from organismal to molecular studies, from single plant analysis to studies of populations and whole ecosystems, and from molecular to biophysical to computational approaches. Frontiers in Plant Science publishes articles on the most outstanding discoveries across a wide research spectrum of Plant Science. The mission of Frontiers in Plant Science is to bring all relevant Plant Science areas together on a single platform.