植物免疫诱抗剂“保康灵1号”对白术品质及根腐病抗病性的影响

Effects of Plant Immune Inducers‘Baokangling No.1’on Quality and Root Rot Resistance of Atractylodes macrocephala

为探究壳寡糖型植物免疫诱抗剂“保康灵1号”(BKL1)对白术品质的影响,通过BKL1单剂与“阿米西达”混配叶面喷施处理白术,测定其农艺性状、田间发病率、苯丙氨酸解氨酶(PAL)活性及品质,并采用隶属函数法对数据进行综合评价.结果显示,BKL1能够促进白术的生长,其中茎粗、分枝数和地下部分折干率均高于空白对照;BKL1还能增强PAL活性,降低根腐病发病率,并提高白术的品质,如醇溶性浸出物、多糖和苍术酮水平均明显高于空白对照.BKL1与“阿米西达”混喷处理效果优于单喷处理,其中BKL1500倍液和“阿米西达”1500倍液混喷效果最佳.表明植物免疫诱抗剂BKL1可促进白术生长,增强白术抗根腐病能力,提高白术品质,为防治白术病害提供了参考.

To investigate the effects of chitosan oligosaccharide-based plant immune inducers,‘Baokangling No.1’(BKL1),on the cultivation quality of Atractylodes macrocephala,and to provide reference for the control of diseases and pests of A.macrocephala.Treatments were applied by spraying BKL1,and three concentration levels of mixture of BKL1 and‘Azoxystrobin’.The agronomic characters,field disease incidence,PAL activity and quality of A.macrocephala were measured,and comprehensive evaluation was conducted by using a membership function method.The results showed that BKL1 could promote the growth of A.macrocephala.The stem diameter,the number of branches and the drying rate of underground parts,as well as the quality parameters such as alcohol-soluble extract,polysaccharide and atractylosin were higher than those of the control group.The effect of combined BKL1 and‘Azoxystrobin’spraying was better than that of single agent spraying,among which,the 500 times dilution of BKL1 with 1500 times dilution of‘Azoxystrobin’mixture spraying was the most effective.The plant immune inducer BKL1 can facilitate the growth of A.macrocephala,bolster its resistance to root rot,and improve the quality of the herb.This study offers valuable insights for the prevention and treatment of diseases in A.macrocephala.