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首页> 外文期刊>South African Journal of Botany >Anther-smut fungal infection of South African Oxalis species: spatial distribution patterns and impacts on host fecundity. (Special Issue: Advances in the pollination biology of South African plants.)
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Anther-smut fungal infection of South African Oxalis species: spatial distribution patterns and impacts on host fecundity. (Special Issue: Advances in the pollination biology of South African plants.)

机译:南非 Oxalis 物种的花药曲霉真菌感染:空间分布模式及其对宿主繁殖力的影响。 (特刊:南非植物授粉生物学的进展。)

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摘要

The smut fungi (phylum Basidiomycota) contain various economically important virulent plant pathogens and may infect only specific plant organs such as flowers. Fungi may replace pollen of infected flowers with their own fungal spores, creating potential study systems for sexually transmitted diseases. An anther-smut fungus, Thecaphora capensis, was recently rediscovered infecting Oxalis flowers in the Greater Cape Floristic Region. This study aimed to provide insight into the ecology and spatial distribution patterns of T. capensis infection. Eight new Oxalis hosts were discovered over a wide geographic area. Two insect species were collected from infected flowers and both carried fungal spores, implicating them as fungal vectors. Host morphology and reproductive success of infected plants differed significantly to that of healthy Oxalis individuals. Nearest neighbour and Gabriel connectedness analyses revealed diseased plants to be spatially clumped, although this non-random distribution could be ascribed to clonality. We found no common tendency for diseased plants to be of a particular floral morph.
机译:黑穗病真菌(Basidiomycota)包含各种经济上重要的有毒植物病原体,可能仅感染特定的植物器官,例如花朵。真菌可以用自己的真菌孢子代替被感染花的花粉,从而为性传播疾病创造潜在的研究系统。最近在大开普植物区发现了花药真菌 Thecaphora capensis ,感染了 Oxalis 花。这项研究旨在提供对 T的生态学和空间分布模式的见解。卡普登斯感染。在广阔的地理区域内发现了八台新的 Oxalis 主机。从受感染的花朵中收集了两种昆虫,它们都携带有真菌孢子,将它们暗示为真菌载体。被感染植物的寄主形态和繁殖成功与健康的 Oxalis 个体明显不同。最近的邻居和Gabriel的连通性分析显示,患病植物在空间上成簇,尽管这种非随机分布可能归因于克隆性。我们没有发现患病植物具有特定花卉形态的普遍趋势。

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