纳米银处理减轻香石竹切花细菌性茎堵塞的研究  

Nano-silver Treatments Alleviated Bacterial Blockage in Cut Carnation Stems

作　　者：刘季平[1,2] 张昭其[2] 李红梅[1] 冼锡金[1] 黄新敏[1] 何生根[1] 

机构地区：[1]仲恺农业工程学院生命科学学院,广州510225 [2]华南农业大学园艺学院,广州510642

出　　处：《园艺学报》2014年第1期131-138,共8页Acta Horticulturae Sinica

基　　金：国家自然科学基金项目(31071829;31272193);广东省自然科学基金项目(10151022501000035;S2012010010418);广东高校优秀青年创新人才培育计划项目(2012LYM0079)

摘　　要：探讨了新型抗菌剂纳米银（nano-silver,NS）处理对香石竹‘Master’切花的保鲜作用及其减轻切花细菌性茎堵塞的效果。结果表明,用150 - 300 mg L-1 NS溶液预处理香石竹切花茎基端1 h后再瓶插于去离子水中,可延长切花的瓶插寿命和促进瓶插期间花径增大,并改善切花的水分吸收和维持切花的鲜样质量,其中以250 mg L-1 NS处理效果最佳;进一步研究发现,250 mg L-1 NS处理可显著延缓香石竹切花茎末端水分导度的降低。采用电感耦合等离子体发射光谱（ICP-AES）法测定NS在香石竹切花体内分布和变化特点表明,经250 mg L-1 NS预处理1 h后,整个瓶插期间NS主要集中在香石竹切花的茎末端。此外,通过扫描电镜观察证实,该处理可显著减轻香石竹切花细菌性茎堵塞的发生。The preservation effects of pretreatment with nano-silver （NS）, a new-type anti-bacterial agent, on cut carnations （Dianthus caryphyllus ＇Master＇ ）, and its efficacy in alleviating bacterial blockage in their stems were investigated. The results showed that pretreatment with 150 - 300 mg · L1 NS for 1 h to cut carnations before placed in vases containing de-ioned water could significantly prolong their vase life, increase the flower diameter, improve water uptake, and maintain relative fresh mass. The best concentration of NS was 250 mg· L1. It was also found that pretreatment with 250 mg·L1 NS could significantly delay the decline in hydraulic conductance in the stem-ends of cut carnations. Further determination using Inductively Coupled Plasma-Atomic Emission Spectrometry demonstrated that NS mostly remained within the lowermost part of the cut carnation stem throughout the vase period. In addition, the observation results of Scanning Electron Microscopy certified that pretreatment with 250 mg · L1 NS could effectively alleviate bacterial blockage in stem-ends of cut carnations.

关 键 词：香石竹 切花 瓶插 纳米银 抗菌作用 茎堵塞 

分 类 号：S681.5[农业科学—观赏园艺]