Coleosporium plumeriae Pat., Bull. Soc. Mycol.

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 : 128-130

Coleosporium plumeriae Pat., Bull. Soc. Mycol. France 18(2): 178 (1902)

Figure 1

Uredinia hypophyllous, scattered, yellow-orange, with a chlorotic spot on the upper side of the leaf, tissue around older sori necrotic. Urediniospores globose, ellipsoidal to broadly ellipsoidal, occasionally cylindrical, (20–)26–33(– 38) × (13–)14–21(–30) µm (n = 90), cellular content bright yellow, wall 2–3 µm thick, hyaline, verrucose, germ pores not seen. Telia not observed.

28S rDNA sequences from three specimens of C. plumeriae from Benin share 100% (899/902 bp) sequence identity with previously published sequences of C. plumeriae (e.g. MF769679 , McTaggart & Aime 2018).

Specimens examined: — Uredinia on Plumeria alba : BENIN. Borgou: N’Dali , elev. 384 m, 9°51’ N, 2°42’ E, 1 September 2019, A . Tabé , Y . Meswaet , and S . Boni , TA423 ( UNIPAR), GenBank Acc. no. LSU: OL 437020 ; Atlantique: Abomey-Calavi , elev. 7 m, 6°27’ N, 2°20’ E, 25 September 2019, A . Tabé and Y . Meswaet , TA435 ( UNIPAR), GenBank Acc. no. LSU: OL 437021 . Uredinia on Plumeria rubra : BENIN. Atlantique: Abomey-Calavi , elev. 7 m, 6°27’ N, 2°20’ E, 24 September 2019, A . Tabé and Y . Meswaet , TA433 ( UNIPAR), GenBank Acc. no. LSU: OL 437022 .

Hosts and distribution in Benin: —Uredinia on Plumeria alba L. and P. rubra L. ( Apocynaceae ), Northern and Southern Benin.

Host species:—Primary host species: Plumeria acuminata W.T. Aiton , P. acutifolia Poir. , P. alba , P. clusioides Griseb. , P. obtusa L., P. pudica Jacq. , P. rubra ; Apocynaceae (Farr & Rossman 2019) . Secondary host species: Pinus sp. ; Pinaceae ( Traquair & Kokko 1980, Weeraratne & Adikaram 2006).

Distribution: —Africa [ Nigeria ( Hernández et al. 2005), Benin (this study)], Asia, Central America, North America, Oceania, South America, Caribbean (Farr & Rossman 2020).

Comments: — Coleosporium plumeriae is reported here for the first time for Benin. As the secondary host ( Pinus sp. ) is not present in Benin, it most likely cycles continuously as urediniospores. The morphological characteristics of the uredinial stage observed for specimens from Benin are identical with those reported for C. plumeriae from other countries (e.g. Chung et al. 2006, Baiswar et al. 2008, Wang et al. 2011).

Figures

FIGURE 1. Coleosporium plumeriae on Plumeria alba (TA423). A Hypophyllous uredinia. Many sori are colonized by a white hyperparasite. B Urediniospores drawn in optical sections. Scale bar: 10 µm.