A petal-less flower caused by a Microbotryum violaceum mutant
A petal-less flower caused by a Microbotryum violaceum mutant
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由紫色小葡萄菌突变体引起的无花瓣花
DOI：
10.1086/665587
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发表时间：
2011
期刊：
影响因子：
--
通讯作者：
S.
中科院分区：
文献类型：
--
作者：
Fujita;N.;Aonuma;W.;Shimizu;Y.;Yamanaka;K.;Hirata;A.;Hood;M.E.;Kawano;S.
花药黑穗病菌，紫色微孢菌，是一种生物营养型植物病原体，导致独特的主机修改。在感染M. violaceum，真菌孢子取代花粉在花药中。此外，雌性（XX）宽叶蝇子草寄主植物的感染导致雄蕊的促进，这是由植物的性别决定（XY）的遗传基础控制的。这种宿主植物操作代表了一个很好的例子，其中真菌的适合度与宿主的花发育密切相关。在本研究中，我们报告Mv 537，第一个M. violaceummutant，改变了S.宽叶花发育，导致无瓣花。无瓣症状可由三个主要致病阶段的失败引起：雄蕊的促进、雌蕊群的抑制和孢子代替花粉。这是M。violaceummutant被认为在孢子产生的“时机”上表现出失败，其中孢子替换花粉的过程比野生型病原体中更早发生和/或存在花发育的“过度抑制”，导致除花药之外的所有花原基的抑制。这是M。violaceummutant不仅可以作为研究发病机制的工具，也可以作为研究diophyllum的工具。
The anther-smut fungus,Microbotryum violaceum, is a biotrophic plant pathogen that causes unique host modifications. In flowers infected byM. violaceum, fungal spores replace pollen in the anthers. In addition, infection of female (XX)Silene latifoliahost plants results in the promotion of stamens, which is otherwise controlled by the plant’s genetic basis of sex determination (XY). This host plant manipulation represents an excellent example where fitness of the fungus is strongly correlated with the host’s floral development. In this study, we report that Mv537, the firstM. violaceummutant, altered the manipulation ofS. latifoliaflower development, causing a petalless flower. The petalless symptom can be caused by failure in the three main pathogenic stages: promotion of stamens, suppression of the gynoecium, and replacement of pollen with spores. ThisM. violaceummutant is thought to exhibit a failure in the “timing” of spore production, in which the process of replacing pollen with spores occurs earlier than in the wild-type pathogen and/or there is “oversuppression” of floral development, resulting in the suppression of all floral primordia except the anthers. ThisM. violaceummutant can be used as a tool for the study not only of pathogenesis but also of dioecy.