深绿木霉HB20111产挥发性物质及其功能分析
2021-10-12扈进冬隋丽娜李玲陈凯李纪顺
扈进冬 隋丽娜 李玲 陈凯 李纪顺



摘要 为了解深绿木霉HB20111产挥發性物质的成分以及潜在的生物学功能,采用顶空气相色谱-质谱法测定了深绿木霉HB20111产挥发性物质的主要成分,并进行了成分分析;采用对扣法测定了深绿木霉HB20111产挥发性物质对5种植物病原菌的抑菌率;同时测定了深绿木霉HB20111产挥发性物质对小麦幼苗生长的影响。结果表明,深绿木霉HB20111产挥发性物质烯类的相对含量最高,为49.68%、醇类为21.78%,酮类为8.56%,其余类别相对含量较低;这些挥发性物质对5种植物病原菌均有一定的抑制效果,其中对立枯丝核菌抑菌率最高,为5062%;挥发性物质还可以促进小麦幼苗生长,与对照相比,对小麦幼苗的株高有显著的促进作用(P<0.05)。这些结果为深绿木霉HB20111的开发应用提供了理论基础。
关键词 深绿木霉; 挥发性物质; 气质联用; 吡喃酮
中图分类号: S 476
文献标识码: A
DOI: 10.16688/j.zwbh.2020655
Identification and functional analysis of volatile organic compounds from Trichoderma atroviride HB20111
HU Jindong1, SUI Lina2, LI Ling1, CHEN Kai1, LI Jishun1*
(1. Shandong Provincial Key Laboratory of Applied Microbiology, Institute of Ecology, Qilu University of Technology
(Shandong Academy of Sciences), Jinan 250103, China; 2. Institute of Biological Engineering, Qilu University of
Technology (Shandong Academy of Sciences), Jinan 250353, China)
Abstract
In order to determine the components and potential biological functions of volatile organic compounds (VOCs) produced by Trichoderma atroviride HB20111, the headspace solid phase microextraction-gas chromatography-mass spectrometry (HS-SPME-GC-MS) was used to analyze the VOCs from T.atroviride HB20111. The inhibition rate of VOCs against five plant pathogenic fungi was measured by using plate-to-plate method, and the promoting effect of the VOCs on the growth of wheat seedlings was explored. The results showed that there were three major classes of VOCs, including alkenes,alcohols and ketones, accounting for 4968%, 21.78% and 8.56% of the total amount, respectively. These VOCs had certain inhibitory effects on the five plant pathogens, and the highest inhibition rate was 50.62% against Rhizoctonia solani. The VOCs also promoted the growth of wheat seedlings and significantly promoted the plant height of wheat seedlings (P<005) compared with the control. These results provide a basis for further application of T.atroviride HB20111.
Key words
Trichoderma atroviride; volatile organic compounds (VOCs); gas chromatography-mass spectrometry; 6-pentyl-2H-pyran-2-one (6PP)
近年来,木霉Trichoderma spp.作为生物防治菌剂防治植物病害已逐渐被人们所熟知[1-2]。同时,已有多种木霉被登记为生物肥料、生物农药、植物刺激剂等产品,广泛用于农业生产。在世界范围内,木霉是最重要的生物农药制剂来源之一,如在印度有大约250种木霉及其衍生物的生物杀菌剂产品[3];我国也有18个已在农业部正式登记的木霉生物农药产品。木霉除具备优良生防功能外,还可以促进植物侧根和根毛生长、提高植物生物量、高度、叶片数量、分蘖、分枝、果实产量等[4-5];对植物光合作用、气孔导度、气体交换、营养物质吸收同化等生理过程具有正向调控作用[6-7];可以分泌植酸酶和有机酸类物质促进植物根系对养分的溶解和吸收[8];通过提高植物氧化应激等方面的作用改善植物在胁迫条件下的生长和繁殖[9-10]。……
