6种香豆素类物质对4种植物种子萌发和幼苗生长的影响

Effects of Six Coumarins on Seed Germination and Seedling Growth of Four Species Plants

香豆素类物质在自然界中广泛存且具有很强的杂草防除潜力,本试验利用培养皿生物检测法,以多花黑麦草(Lolium perenne)、狗尾草(Setaria viridis)、白三叶(Trifolium repens L.)和马齿苋(Portulaca oleracea)为受体材料,研究了6种香豆素类物质水溶液对植物种子萌发和幼苗生长的影响。结果表明,与对照相比,7-羟基香豆素、6-甲基香豆素、4-羟基香豆素、简单香豆素对黑麦草、狗尾草、白三叶种子的萌发有很强的抑制作用(P<0.05);7-羟基香豆素、4-羟基香豆素处理的狗尾草和马齿苋根长显著降低(P<0.05);6-甲基香豆素与简单香豆素处理显著降低了狗尾草与马齿苋的鲜重与干重(P<0.05)。因此,结合香豆素类化合物功能结构与合成水平,推测简单香豆素、6-甲基香豆素、7-羟基香豆素、4-羟基香豆素具有较大潜力开发,可作为除草剂或除草剂中间体。

Coumarins exist widely in nature and have strong weed control potential.The effects of six coumarin aqueous solutions on seed germination and seedling growth were studied by Petri dish bioassay using Lolium perenne,Setaria viridis,Trifolium repens and Portulaca oleracea as receptor materials.The results showed that compared to the control,7-hydroxycoumarin,6-methylcoumarin,4-hydroxycoumarin and simple coumarin could significantly inhibit the seed germination of Lolium perenne,Setaria viridis and Trifolium repens(P<0.05).The root length of Setaria viridis and Portulaca oleracea treated with 7-hydroxycoumarin and 4-hydroxycoumarin was significantly decreased(P<0.05).The 6-methylcoumarin and simple coumarin significantly decreased the fresh and dry weight of Setaria viridis and Portulaca.oleracea(P<0.05).Combined with the functional structure and synthesis level of coumarin compounds,it can be inferred that,simple coumarin,6-methylcoumarin,7-hydroxycoumarin and 4-hydroxycoumarin have a great potential to be developed as coumarin herbicides or herbicide intermediates.