壳寡糖-硒纳米植物营养调节剂的研制与应用  

Preparation and Application of Chitooligosaccharides-selenium Nanoparticles for Plant Nutrition Regulator

作　　者：童春义[1] 肖苏尧[1] 王贝[1] 萧小鹃[1] 郑元青[1] 薛昌刚[1] 汪启明[1] 刘选明[1] 

机构地区：[1]湖南大学生命科学与技术研究院,湖南长沙410082

出　　处：《湖南大学学报（自然科学版）》2008年第10期60-64,共5页Journal of Hunan University:Natural Sciences

基　　金：湖南省生物纳米技术重大专项经费资助项目(03NKYl001)

摘　　要：以壳寡糖为模板，利用复凝聚法制备了壳寡糖一硒纳米颗粒．用透射电子显微镜和Zeta—sizer电位分析仪对颗粒进行表征，发现所制备的颗粒为球状颗粒，平均粒径为100nm左右，表面带弱正电性．纳米颗粒在4℃条件下保存比较稳定，25℃以上使用有利于硒元素的释放．壳寡糖一硒纳米颗粒作为植物营养调节剂应用于水稻种植，试验表明，在水稻孕穗期和齐穗期使用均能显著提高稻谷中硒含量，分蘖期使用无明显富硒情况．孕穗期使用该营养调节剂，稻谷产量提高了8％～15％，硒含量提高了3～10倍，大米中营养物质总抗氧化能力提高了30％～60％，对硒纳米颗粒的作用机制进行了初步探讨认为，壳寡糖-硒纳米颗粒，在植物体内缓慢释放硒元素，促进了植物对硒元素的吸收，硒元素稳定富集在大米胚乳中．Chitcoligosaccharides-Selenium nanoparticles （Se-CSNPs） were synthesized using chitooligosaccharides as the templet through complex coacervation. The nanoparticles were characterized with transmission electron microscope and Zeta-Sizer measurements. The results showed that the average size was about 100 nm, the surface was of a weak positive charge, and the nanoparticles were sphere. At 4℃particles kept relatively stable, and more than 25 12 was useful for the release of elemental selenium. Se-CSNPs as a plant nutrient regulator used in rice planting was found in the booting stage and full panicle stage could increase the Se content obviously, but in the stooling stage was not very effective. Used in the booting stage, rice production increased 8 %- 15 %, selenium content increased 3--10 times and total antioxidant capacity increased 30 % -- 60 %. The mechanism of action was discussed preliminary, and obtained the conclusion that Se-CSNPs would release selenium slowly, especially in plant, then increased the effect of enrichment and stability in the rice endosperm.

关 键 词：复凝聚 壳寡糖-硒纳米颗粒 植物营养调节剂 大米品质 

分 类 号：O613.52[理学—无机化学]