Abstract：
Mesembryanthemum crystallinum L. is a nutritious edible facultative halophyte. This study aimed to investigate the physiology and quality of M. crystallinum L. grown under different salinities and salt-priming conditions. All plants were first grown in 10% artificial seawater (ASW) for 10 days. After that, some plants remained in 10% ASW while the others were transferred to 20%, 30%, 40%, or 50% ASW for another 10 days. Some plants also underwent a salt priming by transferring them gradually from 10% to 100% ASW over a span of 10 days (defined as salt primed). All plants were green and healthy. However, there were reductions in shoot and root productivity, leaf growth, and water content, but also an increase in leaf succulence after transferring plants to higher salinities. The salt-primed plants showed higher photosynthetic light use efficiency with higher chlorophyll concentration compared to other plants. The concentrations of proline, ascorbic acid (ASC), and total phenolic compounds (TPC) increased as percentages of ASW increased. The salt-primed plants switched from C3 to crassulacean acid metabolism photosynthesis and accumulated the greatest amounts of proline, ASC, and TPC. In conclusion, higher salinities and salt priming enhance the nutritional quality of M. crystallinum L. but compromises productivity.
摘要：
MesemedemanthemicratinumL.是一种营养可食用的兼性盐生植物。本研究旨在研究在不同盐度和盐引发条件下生长的M.crystalinumL.的生理和品质。所有植物首先在10%人工海水(ASW)中生长10天。之后,一些植物保持在10%的ASW中，而其他植物转移到20%，30%,40%,或50％ASW再持续10天。一些植物还通过在10天的跨度内将它们从10%逐渐转移到100%ASW而经历盐引发(定义为盐引发)。所有的植物都是绿色和健康的。然而,芽和根系生产力下降，叶片生长,和含水量，而且将植物转移到较高的盐度后，叶片的肉质也会增加。与其他植物相比，盐引发的植物显示出更高的光合光利用效率和更高的叶绿素浓度。脯氨酸的浓度，抗坏血酸（ASC），总酚类化合物（TPC）随着ASW百分比的增加而增加。盐引发的植物从C3转变为景天酸代谢光合作用，并积累了最大量的脯氨酸，ASC,和TPC。总之,较高的盐度和盐引发提高了结晶M.的营养质量，但损害了生产力。
