Citrus Research and Education Center, Institute of Food and Agricultural Sciences, University of Florida, Lake Alfred, Florida 33850, USA.
J Agric Food Chem. 2010 Mar 24;58(6):3309-15. doi: 10.1021/jf100258c.
Wild radish (Raphanus raphanistrum L.) produces glucosinolates (GSL), which are important for its use as a biofumigation or allelopathic plant for weed management. Total GSL concentrations and individual GSLs were quantified in different plant parts at different developmental stages. Eight GSLs were found in various plant tissues but glucoerucin, glucoraphenin, and glucotropaeolin comprised >90% of the total GSLs. All three are degraded to isothiocyanates, which are associated with weed suppression. Maximum GSL concentration (1942.2 micromol/plant) occurred at 50% flowering stage prior to the time of maximum biomass production, when GSL concentration was 1246.65 mumol/plant. Roots contributed <15% of the total GSL. The highest concentration of GSLs was in flowers at flowering stage, but due to the low biomass they contributed only 11.83% to the total GSL. On the basis of these results, wild radish should be incorporated into soil at 50% flowering to provide the most GSLs for weed suppression.
野萝卜（Raphanus raphanistrum L.）会产生硫代葡萄糖苷（GSL），这对于将其作为生物熏蒸剂或化感植物来管理杂草非常重要。在不同的发育阶段，不同植物部位的总 GSL 浓度和单个 GSL 都被定量。在各种植物组织中发现了 8 种 GSL，但葡萄糖异硫氰酸盐、葡萄糖芸薹素和葡萄糖辣根素占总 GSL 的>90%。这三种物质都会降解为异硫氰酸盐，而异硫氰酸盐与杂草抑制有关。在达到最大生物量生产之前的 50%开花期，总 GSL 浓度（1942.2 微摩尔/株）达到最大值，此时 GSL 浓度为 1246.65 微摩尔/株。根的总 GSL 含量不到 15%。开花期花中的 GSL 浓度最高，但由于生物量低，它们对总 GSL 的贡献仅为 11.83%。根据这些结果，野萝卜应在 50%开花期施入土壤，以提供最多的 GSL 来抑制杂草。
