Infection experiments reveal broad host ranges of Eurychasma dicksonii (Oomycota) and Chytridium polysiphoniae (Chytridiomycota), two eukaryotic parasites in marine brown algae (Phaeophyceae)
Infection experiments reveal broad host ranges of Eurychasma dicksonii (Oomycota) and Chytridium polysiphoniae (Chytridiomycota), two eukaryotic parasites in marine brown algae (Phaeophyceae)
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感染实验揭示了迪氏广斑菌（Oomycota）和多管壶菌（Chytridiomycota）的广泛宿主范围，这是海洋褐藻（褐藻纲）中的两种真核寄生虫
DOI：
10.1046/j.1440-1835.1999.00165.x
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发表时间：
1999
影响因子：
1.5
通讯作者：
H. Küpper
中科院分区：
文献类型：
--
作者：
D. Müller;F. Küpper;H. Küpper
利用单藻培养技术，对褐壳Pylaiella littoralis（L.）克氏锥虫感染狄氏阔隙虫（Eurychasma dicksonii（Wright）Magnus）和多囊壶菌（Chytridium polysiphelium（Cohn）H.）E. Petersen（壶菌门）的寄主范围。通过对褐藻纲13目48种寄主的侵染试验，发现45种寄主易受宽裂藻的侵染，23种寄主易受壶藻的侵染。这两种病原体在世代时间上表现出宿主特异性差异：而在Pylaiella中，最短的周期为16天，对于Eurychasma和Chytridium为6天，在Acinetospora中分别需要1天和5天。重寄生虫攻击宿主物种的微观阶段异形生活史，如海带（海带目），记录和讨论作为一个潜在的调节因素的大型藻类的种群动态。
Unialgal cultures of the brown alga Pylaiella littoralis (L.) Kjellman infected by either Eurychasma dicksonii (Wright) Magnus (Oomycota) or Chytridium polysiphoniae (Cohn) H. E. Petersen (Chytridiomycota) were used to elaborate the host ranges of these pathogens. Infection experiments with 48 host species covering 13 orders of the Phaeophyceae showed that 45 species were susceptible to attack by Eurychasma and 23 to Chytridium. The two pathogens showed host‐specific differences in generation times: while in Pylaiella the shortest cycles were 16 days for Eurychasma and 6 days for Chytridium, one and five days more, respectively, were required in Acinetospora. Heavy parasite attack on the microscopic stages of host species with heteromorphic life histories, like kelps (Laminariales), is documented and discussed as a potential regulatory factor for the population dynamics of macroalgae.