A new subgenus, Microidium, of Oidium (Erysiphaceae) on Phyllanthus spp

To-anun, Chaiwat; Kom-un, Sawwanee; Sunawan, A.; Fangfuk, Wanwisa; Sato, Yukio; Takamatsu, Susumu

doi:10.1007/s10267-004-0202-z

Cited by 38 publications

(19 citation statements)

References 22 publications

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“…In these, observations and measurements were taken in the compound microscope (Carl Zeiss ® ), using a 40X lens, of the morphometric characteristics of the 30 repetitions for each structure: diameter of the mycelium, size and shape of conidia, presence of fibrin bodies in conidia, characteristics of the conidiophore (size and shape of the cell base, position of the basal septum), shape of the appresoria on the hyphae and the position of the conidial germ tubes, following the taxonomical key by Braun and Cook (2012). Pfor the observation of the conidial germ tubes, onion cataphylls were innoculated with fungal conidia (To-anun et al, 2005).…”

Section: Methodsmentioning

confidence: 99%

Identificación y alternativas de manejo de la cenicilla del rosal

Serrano

Velasco

Mora‐Herrera

et al. 2015

RMF

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Resumen. La cenicilla del rosal causada por Podosphaera pannosa afecta todas las partes aéreas de la planta, lo que repercute en su calidad como principal componente de la pérdida económica. En el presente trabajo, se confirmó la identidad del agente causal de la cenicilla en rosa y se evaluó el efecto del fosfito de potasio (K 3 PO 3 ), silicio, quitosano y acetato de dodemorf sobre la incidencia y severidad de la enfermedad, así como, su respuesta en la calidad de tallos florales. Se realizaron dos ensayos (febrero-abril y mayo-julio). Las caracterís-ticas morfométricas y moleculares del agente causal de la cenicilla correspondieron a Podosphaera pannosa. El K 3 PO 3 , silicio y quitosano redujeron Abstract. Rose powdery mildew caused byPodosphaera pannosa affects all aerial parts of the plant, which affects their quality as a major component of economic loss. In this work, the causal agent of powdery mildew of rose was identity and confirmed, the effect of potassium phosphite (K 3 PO 3 ), silicon, chitosan and dodemorph acetate on the incidence and severity of the disease was evaluated, as well as their response in the quality of flower stalks. Two trials (February to April and from May to July) were performed. The morphometric and molecular characteristics of the causal agent corresponded to Podosphaera pannosa. The K 3 PO 3 , silicon and chitosan they reduced incidence and severity compared to the control for both assays, however, only the K 3 PO 3 and silicon, exhibited a control similar to provided by the fungicide dodemorph acetate. The treatment with chitosan increased the length and diameter of the stem and flower bud in contrast to K 3 PO 3 and silicon, but was not significant to the control in both tests. Based on the results, the K 3 PO 3 , silicon and

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Section: Methodsmentioning

confidence: 99%

Identificación y alternativas de manejo de la cenicilla del rosal

Serrano

Velasco

Mora‐Herrera

et al. 2015

RMF

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“…Tribe Golovinomyceteae is paraphyletic. Oidium subgenus Microidium, proposed by To-anun et al (2005) as a new subgenus of the mitosporic powdery mildew genus Oidium, formed an independent clade, clearly separated from the other five tribes. Uncinula septata is placed at the very base of the Erysiphales and is a sister to all other erysiphaceous species.…”

Section: Phylogenetic Analysismentioning

confidence: 99%

Phylogenetic relationships and generic affinity of Uncinula septata inferred from nuclear rDNA sequences

2005

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Based on 18S, 5.8S, and 28S rDNA sequences, the phylogenetic position of Uncinula septata within the Erysiphales has been inferred. Although appendages of the ascomata are uncinula like, i.e., unbranched with curvedcoiled apices, U. septata is situated at the very base of the large Erysiphales cluster, far away from the "pseudoidium clade" (Erysiphe emend., including Microsphaera and Uncinula). Morphologically, U. septata differs from the species of Erysiphe sect. Uncinula (ϵUncinula) in having terminal, pluriseptate ascoma appendages, curved ascospores, and the absense of an anamorph. This species is a basal, tree-inhabiting powdery mildew with some additional ancestral characteristics, viz., uncinula-like appendages and 8-spored asci. The new genus Parauncinula with U. septata as the type species is proposed. Uncinula curvispora (ϵU. septata var. curvispora) is tentatively maintained as a separate species, which is also assigned to Parauncinula.

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“…The tribe Phyllactinieae is paraphyletic to the tribes Erysipheae and Golovinomyceteae. The tribe Golovinomyceteae groups with Oidium subgenus Microidium (To-anun et al 2005) .96…”

Section: Resultsmentioning

confidence: 99%