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大豆疫霉慢生长菌株HN-1的生物学特性及传染规律
江涛,潘月敏,凌嵚崟,曹舜,陈艳芬,高智谋
0
(安徽农业大学植物保护学院,合肥230036;南京农业大学生命科学学院,南京 210095)
摘要:
观察和测定了大豆疫霉(Phytophthora sojae)慢生长菌株HN-1及其单游动孢子后代的培养性状及致病力,并将其与正常生长的其他3个菌株进行对峙培养,研究其慢生长特性传染规律,测定受感染菌株的培养特性及致病力。结果表明,大豆疫霉慢生长菌株HN-1的培养特性与正常菌株相比生长显著缓慢,菌落形态有明显差异,卵孢子产生量低,对大豆幼苗的致病力显著较弱;该菌的慢生长特性可通过无性繁殖传递至子代,并可通过对峙培养传染至其他正常生长菌株,传染后产生的受染菌株表现慢生长特性且致病力减弱。
关键词:  大豆疫霉  慢生长菌株  生物学特性  传染规律  生物防治
DOI:
基金项目:国家公益性行业(农业)科研专项(3-20)资助。
Biological characteristics and transmission rules of the slowly-growing Phytophthora sojae isolate HN-1
JIANG Tao,PAN Yue-min,LING Qin-yin,CAO Shun,CHEN Yan-feng,GAO Zhi-mou
(School of Plant Protection, Anhui Agricultural University, Hefei 230036;School of Life Science, Nanjing Agricultural University, Nanjing 210095)
Abstract:
The culture characters and pathogenicity of slowly-growing isolate HN-1 of Phytophthora sojae and its single-zoospore progeny were observed and measured, and the transmission rules and culture characters, pathogenicity of the infected cultures from HN-1 were researched through dual culture with other 3 normally-growing isolates. The results showed that the slowly-growing isolate HN-1 of Phytophthora sojae had significant difference on culture characters, growth rate and oospore production compared with normal-growing isolates. HN-1 was confirmed to be weak pathogenic isolate through inoculation in vivo. The characteristic of slowly-growing of HN-1 could be transferred to normal-growing isolates and the cultures through hyphal contact expressed slowly-growing characteristic and their pathogenicity were weakened.
Key words:  Phytophthora sojae  slowly-growing isolate  biological characteristics  transmission rule  bio-control

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