摘要
本文对青岛地区广玉兰黑斑病的病原菌从培养基种类、温度、光照、pH及不同N源等方面对病原菌的生物学特性影响进行了研究，结果表明病原菌最适生长培养基为PDA培养基和PSA培养基；生长最适温度为25～30℃；病原菌在pH3—11均能生长，而在pH7—8生长最好；病原菌对有机态氮和硝态氮利用较好，而铵态氮对其生长有抑制作用；光照对病原菌的生长无明显影响。分生孢子萌发的最适温度为25～30℃，最适pH为6～7，在1％葡萄糖液、水中及广玉兰叶片浸渍液中萌发均较好。
The effects of media, temperature, light, pH and N source on the biological characteristics of leaf spot pathogen of Magnolia grandiflora were studied. The results showed that the optimal media temperature and pH for its colony growth were PDA and PSA, 25 - 30 ℃ and 7 - 8 respectively. Nitrate - nitrogen were benefit for the colony growth and ammonium - nitrogen could inhabit growth. The optimal temperature, pH and spore germinating liquid were 25 - 30 ℃, 6 - 7 and 1% Glucose liquid, water and maceration extract of Magnolia grandiflora leaves respectively.
出处
《山东农业大学学报（自然科学版）》
CSCD
北大核心
2009年第3期325-328,共4页
Journal of Shandong Agricultural University：Natural Science Edition
关键词
广玉兰
叶斑病
链格孢
生物学特性
萌发率
Magnolia grandiflora
leaf spot
Alternaria tenuissima
biological characteristics
germination
