马铃薯土传病原菌胁迫对其根际土壤可培养微生物的影响
Effects of Potato Soil-borne Pathogen Stress on Culturable Microorganisms in Rhizosphere Soil
许改换 1刘霞 1刀剑 1邓琳梅 1黄勋 1杨俐 2周昆燕 1杨艳丽1
作者信息
- 1. 云南农业大学 植物保护学院,云南 昆明 650201
- 2. 云南省大理市植保植检站,云南 大理 671000
- 折叠
摘要
采用人工接种、稀释平板计数法研究了马铃薯土传病原菌胁迫对其植株生长发育及其根际土壤可培养微生物数量的影响.结果表明:马铃薯的出苗率、株高、叶片SPAD值和薯块产量均不受土传病原菌胁迫的影响;土传病原菌胁迫显著提高了马铃薯土传病害的发生率;马铃薯在整个生育期间的根际土壤可培养微生物数量总体上呈先增加后下降的变化趋势,其总量表现为细菌＞放线菌＞真菌;疮痂病原菌胁迫可以显著提高马铃薯根际土壤可培养细菌和真菌的数量;粉痂病原菌胁迫可以显著增加细菌、真菌和放线菌的数量;青枯病原菌胁迫促进了根际土壤细菌数量的增长,而抑制了真菌和放线菌数量的增长;马铃薯疮痂病和粉痂病的发病率均与土壤中可培养放线菌数量呈显著负相关.
Abstract
The effects of soil-borne pathogens on the growth and development of potato plants and the number of culturable microorganisms in rhizosphere soil were studied by artificial inoculation and dilution plate counting method.The results showed that the emergence rate,plant height,leaf SPAD value and tuber yield of potato were not affected by soil-borne pathogens.The addition of soil-borne pathogens significantly increased the incidence of potato diseases.The number of culturable microorganisms in potato rhizosphere soil increased first and then decreased during the whole growth period,and the order was bacteria>actinomycetes>fungi.The stress of scab pathogen stress can significantly increase the number of culturable bacteria and fungi in potato rhizosphere soil.Powdery scab pathogen stress can significantly increase the number of bacteria,fungi and actinomyces.The stress of bacterial wilt pathogens promoted the growth of bacteria in rhizosphere soil,but inhibited the growth of fungi and actinomyces.The incidence of potato scab and powdery scab was negatively correlated with the number of culturable actinomycetes in soil.
关键词
马铃薯/土传病原菌/生物学特性/根际土壤/可培养微生物Key words
Potato/Soil-borne pathogen/Biological characteristics/Rhizosphere soil/Culturable microorganism引用本文复制引用
基金项目
云南省科技重大专项(202102AE090018)
国家重点研发计划(2018YFD0200808)
云南省现代农业与马铃薯产业技术体系建设项目(2020KJTX03)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据