Puccinia thaliae Dietel, Hedwigia

Tabe, Affoussatou, Aime, M. Catherine, Yorou, Nourou Soulemane & Piepenbring, Meike, 2022, New records and data on rust fungi (Pucciniales, Basidiomycota) in Benin, Phytotaxa 548 (2), pp. 127-145 : 138

Puccinia thaliae Dietel, Hedwigia 38: 250 (1899)

Figure 10

Uredinia amphigenous, more abundant on the adaxial side, scattered, yellow orange, erumpent, subepidermal, associated with chlorotic yellow-orange spots, spots dark brown in severe infections. Urediniospores ellipsoidal to broadly ellipsoidal or pyriform, rarely globose, (27–)30–39(–45) × (15–)19–25(–28) µm (n = 30), pale yellow to hyaline, spore wall 2–3 µm thick, echinulate, germ pores not visible. Telia not observed.

A 28S rDNA sequence of P. thaliae from a specimen from Benin shares 100% (890/892) sequence identity with previously published sequences of P. thaliae (e.g. JX206994 , Padamsee & McKenzie 2012).

Host and distribution in Benin: —Uredinia on Canna indica L. ( Cannaceae ), Southern Benin.

Specimen examined: — Uredinia on Canna indica : BENIN. Atlantique: Allada, Atogon , Niaouli CRA-Sud, elev. 24 m, 6°39’ N, 2°09’ E, 8 May 2019, A . Tabé , TA419 ( UNIPAR), GenBank Acc. no. LSU: OL 437036 .

Host species:—Primary host species: Canna coccinea Mill. , C. compacta Roscoe , C. edulis Ker Gawl. , C. generalis L.H. Bailey , C. glauca L., C. indica , C. patens (Aiton) Roscoe , Canna sp. ; Cannaceae . Calathea sp. , Ctenanthe sp. , Ischnosiphon arouma (Aublet) Körn. , I. leucophaeus (Poepp. & Endl.) Körn. , I. simplex Huber , Ischnosiphon sp. , Maranta arundinacea L., Maranta sp. , Thalia dealbata Fraser ( Hennen et al. 2005) , Stromanthe tonckat (Aubl.) Eichler ( Nelson 2013) ; Marantaceae . Secondary host species: not known ( Hennen et al. 2005).

Distribution: —Africa [ Uganda ( Gjaerum et al. 2003), Nigeria ( Eboh 1986), Southern Africa ( Van Jaarsveld et al. 2007), Benin (this study)], Asia, Central America, Europe, North America, Oceania, Southern America, Caribbean (Farr & Rossman 2020).

Comments:—The size of the urediniospores is rather variable according to data in diverse publications ( Eboh 1986, Hennen et al. 2005, Cedas de Jesus et al. 2018). The size of the urediniospores of the present specimen is similar to sizes reported by Padamsee & McKenzie [2012; (23–)26–36(–43) × 17–23(–27) μm] and Nelson [2013; 28–40 × 20–25 μm]. Puccinia thaliae is reported here for the first time for Benin.

Figures

FIGURE 10. Puccinia thaliae Dietel on Canna indica (TA419). A Hypophyllous uredinia B urediniospores drawn in optical sections except one spore. Scale bar: 10 µm.