仿生型信号分子对烟草硝酸盐、亚硝酸盐的抑制作用

华煜; 林国平; 黄文昌; 程新胜

doi:10.3969/j.issn.1002-0861.2010.04.012

仿生型信号分子对烟草硝酸盐、亚硝酸盐的抑制作用

Inhibition Action of Bionics Signal Molecule to Nitrate and Nitrite Contents in Tobacco

摘要

摘要: 硝酸盐、亚硝酸盐是烟草特有亚硝胺(TSNAs)的前体物。用源于取食烟草的寡食性昆虫口腔分泌物的仿生型信号分子(BSM)物质,在不同浓度下,对烤烟和白肋烟打顶后伤口进行涂抹处理,用比色法检测处理株和对照株烟叶中NO₃^-,NO₂^-的含量,并分析BSM对烟草NO₃^-,NO₂^-的影响。结果表明:BSM物质对烤烟和白肋烟打顶后叶片中NO₃^-,NO₂^-有不同程度的抑制作用;BSM处理对中部叶NO₃^-和NO₂^-含量影响大于上部叶、对NO₃^-的抑制作用强于NO₂^-;在白肋烟上,BSM对NO₃^-和NO₂^-含量的抑制程度与剂量有关,BSM的浓度越高,处理株中NO₃^-和NO₂^-含量越低。

Abstract: Nitrate and nitrite are the precursors of TSNAs.The bionics signal molecule(BSM) matter sourced from oral secretion of oligophagous tobacco pests was applied to the topped caulis of flue-cured and burley tobacco at different concentrations. The contents of NO₃^- and NO₂^- in treated tobacco leaves and the control were analyzed with colorimetry,and the effects of BSM on NO₃^- and NO₂^- contents were analyzed.The results indicated that:BSM inhibited NO₃^- and NO₂^- accumulation in flue-cured and burley tobacco leaves after topping to different extents;BSM's effects on middle leaves was stronger than on upper leaves,stronger on NO₃^- content than on NO₂^- content.For burley tobacco,the effects of BSM on NO₃^- and NO₂^- correlated with the dose,the higher the concentration of BSM,the lower the contents of NO₃^- and NO₂^- would be.

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