Effect Of Blue And Red Films On The Flavor Of Radish (Raphanus Sativus L.)

The aim of our study was analysis the effect of light density and quality on the biomass and the quality factor such as chlorophyll content,free amino acid,vitamin C content, solubility sugar content and nitrate content in radish sprout and edible root,by treating the radish with blue and red films.We also investigated detailed the change of composition and content of glucosinolate(GS)which effect the piquancy of radish.The result showed:(1)A total of eight glucosinolates(GSs)were identified in the sprouts and edible roots of radish(Raphanus sativus L.),including five aliphatic GSs(4-methylsulfinyl-3-butenyl GS,2-hydroxy -3-butenyl GS,ethyl GS,4-methylthio-3-butenyl GS and 6-heptenyl GS)and three indolyl GSs(l-methoxyindol-3-ylmethyl GS,indol-3-ylmethyl GS,4-hrdroxyindol-3-ylmethyl GS).(2)The growth of radish sprout was repressived significantly.The free amino acid content, the vitamin C content and solubility sugar content were decreased with the density of shading. Whereas,in the edible root,there was no obvious change in the growth and vitamin C content, and the free amino acid content was decreased,but the solubility sugar content was ascended. The total glucosinolate content in radish sprout and edible root were enhanced under shading treatment.The indolyl GSs were enhanced remarkably under slightly shading,the aliphatic GSs were enhanced under heavily shading in radish sprout.Whereas the indolyl GSs were decreased under shading treatment,and the aliphatic GSs were enhanced remarkably in radish edible root.(3)Blue and red color films treatment had the restrain effect on the radish sprout.The content of free amino acid,vitamin C and solubility sugar decreased remarkably in radish sprout.There was no obvious effect on the edible root,the blue film decreased the biomass of edible root,and the red film enhances the solubility sugar content of edible root.Blue and red films both enhanced the total glucosinolate content,the effect of red film was remarkable.The effect of blue film was obvious on the aliphatic GSs in radish sprout and indolyl GSs in edible root while the effect of red film was on all GSs.