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首页> 外文期刊>MycoKeys >New host associations and a novel species for the gall-inducing acacia rust genus Ravenelia in South Africa
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New host associations and a novel species for the gall-inducing acacia rust genus Ravenelia in South Africa

机译：南非引起胆汁的金合欢锈属Ravenelia的新寄主协会和新物种

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摘要

Trees in the genus Vachellia (previously Acacia) are commonly infected by the gall-inducing rusts Ravenelia macowaniana and R. evansii. Rust galls bearing aecial infections and relating uredinial and telial infections on the leaves of nine Vachellia species not previously recorded to be infected by Ravenelia spp. have recently been collected in South Africa. The rust fungi causing these infections were characterised using molecular phylogenetic analyses of DNA sequence data of the LSU and ITS rDNA regions as well as morphological examinations. The host range of R. macowaniana and R. evansii was thus re-assessed and extended from four to nine species and from one to three species, respectively. Application of Principal Component Analyses (PCA) of telial morphological characters provided evidence of an effect of the host species on the teliospore morphology in R. evansii, but only minor effects in R. macowaniana. A novel gall-inducing Ravenelia sp. closely related to R. macowaniana, was found on Vachellia xanthophloea and it is described here as R. xanthophloeae.
机译：Vachellia属（以前为Acacia）属的树木通常被引起锈病的锈病Ravenelia macowaniana和R. evansii感染。锈菌胆汁在先前未记录为受Ravenelia spp感染的9种Vachellia物种的叶子上带有人工感染和相关的尿素和telial感染。最近在南非收集。通过对LSU和ITS rDNA区域的DNA序列数据进行分子系统发育分析以及形态学检查来表征引起这些感染的锈菌。因此，重新评估了R. macowaniana和R. evansii的寄主范围，并将其范围分别从4种增加到9种和从1种扩大到3种。端粒形态特征的主成分分析（PCA）的应用提供了证据，证明了寄主物种对埃文氏菌的孢子形态有影响，而对马可波纳氏菌只有很小的影响。一种新颖的引起胆汁的乌鸦菌。与R. macowaniana密切相关，在Vachellia xanthophloeae上发现，在这里被称为R. xanthophloeae。

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