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筛选耐盐又具有重要经济价值的植物品种是滨海地区生态修复工程的关键。本研究通过砂培方式对番杏(Tetragonia tetragonoides)幼苗进行不同盐度(0、100、200、300、400、600mmol·L-1)处理,7周后测定其生长指标、生物量、光合和荧光参数,探讨番杏的耐盐能力。结果表明:番杏生长的适宜盐度范围为0～400mmol·L-1,受抑制盐度为600mmol·L-1,说明番杏是一种耐盐性较高的盐生植物;番杏叶片净光合速率、气孔导度和蒸腾速率均随盐度的增加而降低,气孔限制值则相反;高盐通过影响番杏光合系统Ⅱ反应中心的关闭程度、光化学反应吸收光的比例和电子传递速率来抑制叶片光合速率,从而降低其生长速率;番杏是一种耐盐性高、具有食用价值的盐生植物,值得在滨海湿地生态修复工程重点推广。
Screening of salt-tolerant and important economic value plant species is the key to the ecological restoration project in the coastal area. In this study, seedlings of Tetragon tetragonoides were treated with different salinities (0, 100, 200, 300, 400 and 600 mmol·L-1) by sand culture method. After 7 weeks, their growth indexes, biomass, photosynthesis Fluorescence parameters to explore the salt tolerance of apricot. The results showed that the suitable salinity range of Angelica sinensis growth was 0-400mmol·L-1 and the salinity inhibition was 600mmol·L-1, which indicated that Angelica sinensis was a salt-tolerant plant with high salt tolerance. The net photosynthetic rate, stomatal conductance and transpiration rate decreased with the increase of salinity, and the stomatal limitation was the opposite. High salt affected the degree of closure of the reaction center of the apricot photosynthesis system Ⅱ, the ratio of light absorption by photochemical reaction and the electron transfer rate To inhibit leaf photosynthetic rate, thereby reducing its growth rate; apricot is a salt tolerance, edible value of halophytes, it is worth in the coastal wetland ecological restoration project to promote.