CN110537544B - β-D-叠氮葡萄糖苷作为绿色抑菌剂在抑制植物病原菌生长中的应用 - Google Patents
β-D-叠氮葡萄糖苷作为绿色抑菌剂在抑制植物病原菌生长中的应用 Download PDFInfo
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Abstract
本发明一种β‑D‑叠氮葡萄糖苷作为绿色抑菌剂在抑制植物病原菌生长中的应用,本发明的β‑D‑叠氮葡萄糖苷具有很好的抑菌活性,同时该化合物具有很好的水溶性,使用时无须使用有机溶剂来促进其溶解,单独使用水即可溶解施用,而且所述化合物在紫外光照射下,释放出氮气后,残留物为无害的次生糖类物质。完全满足绿色农药无毒无残留的要求,可替代现有的有毒,难降解,高残留的农用杀菌剂,这对农作物特别是茶叶、水稻和水果等的生产是非常重要。
Description
技术领域
本发明涉及绿色农用抑菌剂的应用,具体涉及一种β-D-叠氮葡萄糖苷作为绿色抑菌剂在抑制植物病原菌生长中的应用。
背景技术
农作物病害是制约农业可持续发展的关键因素之一。目前常用农用杀菌剂主要有多菌灵、甲基托布津、福美砷等。但这些杀菌剂都存在一些不足之处,例如多菌灵对人体具有潜在的代谢遗传毒性,且长期施用会导致耐药菌的产生,并对其它苯并咪唑杀菌剂产生交互抗性。代森锰锌长期施用可能造成土壤重金属积累,而且过量的锰离子还会对作物产生药害。因此探寻绿色无公害农药,特别是在环境中易分解,在农作物中低残留或无残留的绿色农药,对保障食品安全和环境安全意义十分重大。
茶叶和水稻均为食品,其卫生质量与人们的健康息息相关。目前茶叶中的农药残留问题日益突出。为此探寻可用于茶树和水稻病害控制的绿色抑菌剂就显得十分重要。
发明内容
本发明的目的在于克服现有技术的不足,提供了一种β-D-叠氮葡萄糖苷作为绿色抑菌剂在抑制植物病原菌生长中的应用。植物病原菌对农作物产量影响巨大,为此,在农业生产中须使用抑菌剂,但抑菌剂的使用对食品与环境的安全造成不利影响,因此绿色抑菌剂的使用对控制农作物病原菌问题意义重大。
为实现上述目的,本发明所设计一种β-D-叠氮葡萄糖苷作为绿色抑菌剂在抑制植物病原菌生长中的应用。
进一步地,所述β-D-叠氮葡萄糖苷的化学式
本发明还提供了一种β-D-叠氮葡萄糖苷在制备绿色抑菌剂中的应用。
进一步地,所述绿色抑菌剂作用于植物病原菌;所述植物病原菌选自茶树炭疽菌、茶树链格孢霉菌和水稻白叶枯菌。
再进一步地,所绿色抑菌剂中,β-D-叠氮葡萄糖苷含量为75~600mg/L。
再进一步地,所述绿色抑菌剂作用于茶树炭疽菌或茶树链格孢霉菌时,β-D-叠氮葡萄糖苷含量为200mg/L。
再进一步地,所述绿色抑菌剂作用于水稻白叶枯菌时,β-D-叠氮葡萄糖苷含量为300mg/L。
本发明的有益效果:
本发明的β-D-叠氮葡萄糖苷具有很好的抑菌活性,同时该化合物具有很好的水溶性,使用时无须使用有机溶剂来促进其溶解,单独使用水即可溶解施用,而且所述化合物在紫外光照射下,释放出氮气后,残留物为无害的次生糖类物质。完全满足绿色农药无毒无残留的要求,可替代现有的有毒,难降解,高残留的农用抑菌剂,这对农作物特别是茶叶、水稻和水果等的生产是非常重要。
附图说明
图1为β-D-叠氮葡萄糖苷1H NMR图;
图2为β-D-叠氮葡萄糖苷13C NMR图。
具体实施方式
下面结合具体实施例对本发明作进一步的详细描述,以便本领域技术人员理解。
实施例1β-D-叠氮葡萄糖苷的合成
参考文献方法(Prakas R RK,Anup Kumar Misra M.Glycoconjugate Journal,2008,25:595-602.)。所得β-D-叠氮葡萄糖苷为淡黄色粘稠状物。核磁共振图见附图1和2。1H NMR(d6-DMSO,600MHz,δ):4.45(d,1H,J=8.4Hz,H-1);3.67(dd,1H,J=12.0Hz,J=1.8Hz,H-4);3.45(dd,1H,J=12.0Hz,J=6.0Hz,H-3);3.24-3.21(m,1H,H-5);3.18(t,1H,J=9.0Hz,H-2);3.17(s,4H,OH);3.07(d,1H,J=8.4Hz,H-6a);2.99(d,1H,J=9.6Hz,H-6b)。13C NMR(d6-DMSO,600MHz,δ):90.61,79.66,76.99,73.81,69.99,61.22。
实施例2β-D-叠氮葡萄糖苷在紫外光辐照下的降解实验
取0.2g上述方法制备的β-D-叠氮葡萄糖苷溶于20ml水中,所得到的溶液转入直径为6cm的表面皿中,表面皿放置在紫外灯下约30cm处进行辐照,紫外灯功率为60瓦,每隔4小时用毛细管取样进行TLC检测。经过60小时辐照后,β-D-叠氮葡萄糖苷斑点完全消失,并产生新的点,表明β-D-叠氮葡萄糖苷已经完全分解。
实施例3β-D-叠氮葡萄糖苷对茶树炭疽和茶树链格孢霉菌的抑制作用
用移液枪分别取100、200、400uL的3×104mg/L无菌β-D-叠氮葡萄糖苷水溶液加入到30mL PDA培养基中,混合均匀后,平分倒入到两个培养皿中,即分别得到浓度为100、200和400mg/Lβ-D-叠氮葡萄糖苷的培养基,将活化好的茶树炭疽(BNCC115274)和茶树链格孢霉菌(BNCC113647)用1mL的枪头打孔,得到直径为0.8cm的菌饼,并接种到含有β-D-叠氮葡萄糖苷的培养基上,并做空白对照试验,每个浓度每个菌种重复三次。接种完成后,用封口膜封口,置于28℃的培养箱中进行培养。五天后观测结果。采用十字交叉法测定菌饼的直径,并计算抑制率。实验结果见表1。
表1β-D-叠氮葡萄糖苷对茶树炭疽菌和茶树链格孢霉菌的抑菌效果
实施例4β-D-叠氮葡萄糖苷对水稻白叶枯菌的抑制效果水稻白叶枯培养基的配制:称取300g削皮土豆,将其放入到水中煮沸30min,然后用纱布过滤取得汁液,向里面加入胰蛋白胨5g,蔗糖15g,Na2HPO4·12H2O 2g,Ca(NO3)2·4H2O 0.5g,搅拌溶解后,并用NaOH将溶液pH调节到6.8-7.0,定容到1000mL;随后分装到250mL锥形瓶中,于121℃高温灭菌30min,冷却后即可用作培养基。
抑菌实验方法:用移液枪分别取适量无菌β-D-叠氮葡萄糖苷水溶液,加入到10mL无菌带塞试管中,随后再加入0.5mL稀释水稻白叶枯菌液(JL691),用培养液定容到5mL后摇匀,所用β-D-叠氮葡萄糖苷最终实验浓度为75、150、300、600mg/L,每个实验组做三个重复。置于28℃的摇床中进行培养。培养4个小时后,在600nm的条件下测吸光度,通过吸光度计算抑制率。实验结果见表2。
表2β-D-叠氮葡萄糖苷对水稻白叶枯菌的抑菌效果
浓度(mg/L) | 75 | 150 | 300 | 600 |
抑菌率(%) | 18 | 23 | 51 | 80 |
其它未详细说明的部分均为现有技术。尽管上述实施例对本发明做出了详尽的描述,但它仅仅是本发明一部分实施例,而不是全部实施例,人们还可以根据本实施例在不经创造性前提下获得其他实施例,这些实施例都属于本发明保护范围。
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