Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria, Pretoria 0002, South Africa.
Mycologia. 2002 Jul-Aug;94(4):722-30. doi: 10.1080/15572536.2003.11833199.
Mango malformation is an economically important disease of Mangifera indica globally. A recent DNA-based study indicated that two distinct, phylogenetic lineages previously identified as Fusarium subglutinans are associated with this disease in South Africa. The objective of this study was to characterize Fusarium isolates associated with mango malformation, including the two different F. subglutinans groups, based on morphological characteristics. For this purpose we examined Fusarium strains isolated from diseased mango inflorescences from diverse geographical origins. We also used sexual compatibility tests to determine whether sexual reproduction among the strains was possible. The morphological characters considered were shape of the conidia, presence of mono- and/or polyphialides, origin of the conidiophores from the substrate, presence of chlamydospores and the presence of sterile coiled hyphae. Three unique Fusarium spp. were identified. In this paper, we provide formal descriptions for the two new taxa in the section Liseola that we have named F. mangiferae and F. sterilihyphosum. Fusarium mangiferae is conspecific with strains that were previously identified as F. subglutinans and reported to be the causal agent of malformation in mango growing areas throughout the world. Fusarium sterilihyphosum, on the other hand, has been isolated only from malformed mango tissue in South Africa.
芒果畸形病是全球芒果属植物的一种重要经济病害。最近的一项基于 DNA 的研究表明，以前被鉴定为突脐蠕孢菌的两个不同的系统发育谱系与南非的这种疾病有关。本研究的目的是根据形态特征对与芒果畸形病相关的尖孢镰刀菌分离物进行特征描述，包括两个不同的突脐蠕孢菌群。为此，我们检查了从不同地理起源的患病芒果花序中分离出的尖孢镰刀菌菌株。我们还使用有性杂交测试来确定菌株之间是否存在有性繁殖。考虑的形态特征包括分生孢子的形状、单生和/或多生瓶梗的存在、分生孢子梗的起源、厚垣孢子的存在以及无菌螺旋状菌丝的存在。鉴定出了三个独特的尖孢镰刀菌种。在本文中，我们对我们在 Liseola 节中命名为 F. mangiferae 和 F. sterilihyphosum 的两个新分类群提供了正式描述。F. mangiferae 与以前被鉴定为 F. subglutinans 的菌株相同，并且被报道是世界各地芒果种植区畸形病的病原体。另一方面，F. sterilihyphosum 仅从南非畸形芒果组织中分离出来。
