锌掺杂荧光硅量子点作为叶面光肥对生菜生长的影响  

Effect of Zinc-doped fluorescent silicon quantum dots as foliar photofertilizer on lettuce growth

作　　者：孙倩 崔曦鹏 叶勇[1] 何瑜[1] SUN Qian;CUI Xipeng;YE Yong;HE Yu(College of Chemistry and Chemical Engineering,Hubei University,Wuhan 430062,China;Hubei BaiJieRui Advanced Materials Co.,Ltd.,Wuhan 430070,China)

机构地区：[1]湖北大学化学化工学院,湖北武汉430062 [2]湖北百杰瑞新材料股份有限公司,湖北武汉430070

出　　处：《湖北大学学报（自然科学版）》2024年第2期182-190,共9页Journal of Hubei University：Natural Science

基　　金：湖北省科技发展专项(42000022205T000000192)资助。

摘　　要：以N-氨乙基-γ-氨丙基二甲氧基硅烷分子(DAMO)作为硅源,采用水热法合成一种高分散性、光学性能稳定的锌掺杂荧光硅量子点(Si@Zn QDs)。以Si@Zn QDs作为叶面光肥,吸收太阳光中不被植物利用的紫外光,发出能使生菜吸收进行光合作用的蓝光,提高了光能利用率。通过14 d的水培试验评估Si@Zn QDs作为叶面光肥对生菜生长的影响。结果表明,Si@Zn QDs与生菜的叶绿体(CLP)复合后,提高了希尔反应活性,当锌掺杂量达0.1%时,对生菜生长的促进效果最明显。与对照组相比,干质量和鲜质量分别增加41.64%和52.20%。Si@Zn 0.1%QDs(100 mg·L^(-1))使生菜叶片中叶绿素a、叶绿素b、总叶绿素、类胡萝卜素和蛋白质含量分别提高60.56%、56.37%、61.20%、49.75%和29.90%。这项工作为锌掺杂荧光硅量子点在植物光合作用中的应用提供了科学依据。Zinc-doped fluorescent silicon quantum dots(Si@Zn QDs)with high dispersibility and optical stability were synthesized by hydrothermal method using N-aminoethyl-γ-aminopropyl dimethoxysilane(DAMO)as a silicon source.Si@Zn QDs,as foliar photofertilizer,can transferred ultraviolet light of the sunlight to the blue emission which can be absorbed by lettuce for photosynthesis,thus improving the utilization rate of light energy.The effect of Si@Zn QDs as foliar fertilizer on lettuce growth was assessed by a 14-day hydroponic experiment.The results show that when Si@Zn QDs are combined with lettuce chloroplasts(CLP),the Hill reaction activity was improved.When the doping amount of zinc is 0.1%,the promotion effect on lettuce growth is the most obvious.Compared with the control group,the dry weight and fresh weight increased by 41.64%and 52.20%,respectively.The employment of Si@Zn 0.10%QDs(100 mg·L^(-1))increases the contents of chlorophyll a,chlorophyll b,total chlorophyll,carotenoids and protein in lettuce leaves by 60.56%,56.37%,61.20%,49.75%and 29.90%,respectively.This work provides a scientific basis for the application of zinc-doped fluorescent Si quantum dots in plant photosynthesis.

关 键 词：锌掺杂荧光硅量子点 叶面光肥 希尔反应 光能利用率 

分 类 号：O657.3[理学—分析化学]