Pythium and Phytophthora species associated with root and stem rots of kalanchoe
Pythium and Phytophthora species associated with root and stem rots of kalanchoe
复制标题
与长寿花根腐病和茎腐病相关的腐霉属和疫霉属物种
DOI：
10.1007/s10327-006-0338-0
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发表时间：
2007
影响因子：
1.2
通讯作者：
K. Kageyama
中科院分区：
文献类型：
--
作者：
Hideki Watanabe;Y. Taguchi;M. Hyakumachi;K. Kageyama
从发生根腐病和茎腐病的甘蓝植株上分离到腐霉属和疫霉属的菌株，通过形态特征和rDNA内转录间隔区的限制性片段长度多态性（RFLP）分析，鉴定为烟草疫霉（Phytophthora nicotianae）。经鉴定，分离的腐霉属为螺旋状腐霉（Pythium helicoides）和多叶腐霉（Pythium myriotylumand）。在致病性试验中，三个种的分离物引起根和茎的腐烂。腐霉属Pythiumspp.和Ph.在30 ° C下，烟草黑腐病菌在两种不同相对湿度（60%和>95%）下均能引起茎腐病。在高湿度（>95%）条件下，螺旋虫引起根腐病和茎腐病，而在低湿度（60%）条件下，螺旋虫只引起根腐病。
PythiumandPhytophthoraspecies were isolated from kalanchoe plants with root and stem rots.Phytophthoraisolates were identified asPhytophthora nicotianaeon the basis of morphological characteristics and restriction fragment length polymorphism (RFLP) analysis of the rDNA-internal transcribed spacer regions. Similarly, thePythiumisolates were identified asPythium myriotylumandPythium helicoides. In pathogenicity tests, isolates of the three species caused root and stem rots. Disease severity caused by thePythiumspp. andPh. nicotianaewas the greatest at 35°–40°C and 30°–40°C, respectively.Ph. nicotianaeinduced stem rot at two different relative humidities (60% and >95%) at 30°C.P. myriotylumandP. helicoidescaused root and stem rots at high humidity (>95%), but only root rot at low humidity (60%).
影响因子：
1.2
作者：
K. Kageyama;Ayako Nakashima;Yuki Kajihara;H. Suga;E. Nelson
通讯作者：
K. Kageyama;Ayako Nakashima;Yuki Kajihara;H. Suga;E. Nelson