The edible halophyte Mesembryanthemum crystallinum L. was grown at different NaCl salinities under different combined red and blue light-emitting diode (LED) light treatments. High salinity (500 mM NaCl) decreased biomass, leaf growth, and leaf water content. Interactions between LED ratio and salinity were detected for shoot biomass and leaf growth. All plants had F_v/F_m ratios close to 0.8 in dark-adapted leaves, suggesting that they were all healthy with similar maximal efficiency of PSII photochemistry. However, measured under the actinic light near or above the growth light, the electron transport rate (ETR) and photochemical quenching (qP) of M. crystallinum grown at 100 and 250 mM NaCl were higher than at 500 mM NaCl. Grown under red/blue LED ratios of 0.9, M. crystallinum had higher ETR and qP across all salinities indicating higher light energy utilisation. Crassulacean acid metabolism (CAM) was induced in M. crystallinum grown at 500 mM NaCl. CAM-induced leaves had much higher non-photochemical quenching (NPQ), suggesting that NPQ can be used to estimate CAM induction. M. crystallinum grown at 250 and 500 mM NaCl had higher total chlorophyll and carotenoids contents than at 100 mM NaCl. Proline, total soluble sugar, ascorbic acid, and total phenolic compounds were higher in plants at 250 and 500 mM NaCl compared with those at 100 mM NaCl. An interaction between LED ratio and salinity was detected for proline content. Findings of this study suggest that both salinity and light quality affect productivity, photosynthetic light use efficiency, and proline accumulation of M. crystallinum.

食用盐生植物Mesembryanthemum crystallinum L. 在不同的 NaCl 盐度和不同的红蓝发光二极管 (LED) 组合光处理下生长。高盐度（500 mM NaCl）降低了生物量、叶片生长和叶片含水量。对于枝条生物量和叶片生长，检测了 LED 比率和盐度之间的相互作用。所有植物在暗适应叶片中的F _v / F _m比率接近 0.8，这表明它们都是健康的，具有相似的 PSII 光化学最大效率。然而，在接近或高于生长光的光化光下测量M. crystallinum的电子传输速率 (ETR) 和光化学猝灭 (qP)在 100 和 250 mM NaCl 下生长的浓度高于 500 mM NaCl。在 0.9 的红/蓝 LED 比率下生长，M. crystallinum在所有盐度中具有更高的 ETR 和 qP，表明更高的光能利用率。在生长于 500 mM NaCl的M. crystallinum中诱导了景天酸代谢 (CAM) 。CAM 诱导的叶片具有更高的非光化学猝灭 (NPQ)，表明 NPQ 可用于估计 CAM 诱导。M.晶体在 250 和 500 mM NaCl 下生长的总叶绿素和类胡萝卜素含量高于在 100 mM NaCl 下生长的总叶绿素和类胡萝卜素含量。与 100 mM NaCl 相比，在 250 和 500 mM NaCl 下植物中的脯氨酸、总可溶性糖、抗坏血酸和总酚类化合物含量更高。对于脯氨酸含量，检测到 LED 比率和盐度之间的相互作用。这项研究的结果表明，盐度和光质都会影响M. crystallinum的生产力、光合光利用效率和脯氨酸积累。