Podosphaera xanthii causing powdery mildew on Impatiens balsamina in China

Figures & data

Fig. 1 Signs and symptoms of powdery mildew disease on Impatiens balsamina.

Table 1. Podosphaera sp. and their corresponding hosts

	Powdery mildew fungus	Host	Location and year	Accession No.	Reference
1	Podosphaera xanthii	Impatiens balsamina	Henan, China; 2020 and 2021	MW301281	This study
2	Podosphaera xanthii	Abelmoschus esculentus	Iksan, Korea; 2014	MG754404	(Choi et al. 2018)
3	Podosphaera hibiscicola	Hibiscus mutabilis	Chiba, Japan; 2000	AB040308	(Hirata et al. 2000)
4	Podosphaera macrospora	Tellima grandiflora	United Kingdom; 2015	KX032536	(Ellingham et al. 2016)
5	Podosphaera tridactyla	Sorbaria sorbifolia		MK425648
6	Podosphaera clandestina	PM Phlox paniculata		MW168800
7	Podosphaera ampla	Prunus salicina x persica	Australia; 2021	MW364541	(Smith et al. 2021)
8	Podosphaera erigerontis	Crepis sancta-A		MW703889
9	Podosphaera aphanis	Rubus pringlei Rydb	Chiapas and Michoacán, Mexico; 2020	MW988591	(Solano-Báez et al. 2021)
10	Podosphaera leucotricha	Photinia x fraseri	Torino, Italy; 2004	MW364490	(Garibaldi et al. 2005)
11	Podosphaera pannosa	Citrus ×reticulata-sinensis	Coquimbo; 2017	MK260048	(Cornejo et al. 2019)
12	Podosphaera xanthii	Impatiens balsamina	Aomori, Japan; 2001	AB462803	(Ito and Takamatsu 2010)
13	Podosphaera xanthii	Impatiens balsamina	Kagoshima, Japan; 2000	AB462799	(Ito and Takamatsu 2010)
14	Podosphaera xanthii	Impatiens balsamina	Mie, Japan; 2000	AB462800	(Ito and Takamatsu 2010)
15	Podosphaera balsaminae	Impatiens noli-tangere	Hokkaido, Japan; 2003	AB462805	(Ito and Takamatsu 2010)
16	Podosphaera balsaminae	Impatiens noli-tangere	Hokkaido, Japan; 2003	AB462807	(Ito and Takamatsu 2010)
17	Podosphaera balsaminae	Impatiens noli-tangere	Iwate, Japan; 2003	AB462806	(Ito and Takamatsu 2010)
18	Podosphaera balsaminae	Impatiens noli-tangere	Niigata, Japan; 1996	AB040318	(Ito and Takamatsu 2010)
19	Podosphaera xanthii	Impatiens textori	Nagano, Japan; 2000	AB462801	(Ito and Takamatsu 2010)
20	Podosphaera xanthii	Impatiens textori	Akita, Japan; 2001	AB462802	(Ito and Takamatsu 2010)
21	Podosphaera xanthii	Impatiens textori	Niigata, Japan; 1996	AB040344	(Ito and Takamatsu 2010)

Fig. 2 Fungal structures of P. xanthii on host leaf surface. The structures were stained with trypan blue.

Fig. 3 PCR detection of the powdery mildew on I. balsamina samples collected in 2021 (A) and 2020 (B). M: marker; 1–4: diseased samples.

Fig. 4 Phylogenetical analysis of P. xanthii and Podosphaera sp. The neighbour joining tree was constructed in MEGA software with 1000 bootstrap replicates and p-distance method. The bar indicates a distance of 0.020. Red dot highlights P. xanthii. Arthrocladiella mougeotii and Erysiphe sp. were included as outgroup.

Fig. 5 P. xanthii infected I. balsamina and signs of powdery mildew 10-days post inoculation.

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