Puccinia caricis-hebeiensis Jing X. Ji, Zhuang Li, Y. Li & Kakish., 2022

Ji, Jingxin, Li, Zhuang, Li, Yu & Kakishima, Makoto, 2022, Phylogenetic approach for identification and life cycles of Puccinia (Pucciniaceae) species on Carex (Cyperaceae) from northeastern China, Phytotaxa 542 (3), pp. 221-255 : 238-240

C7: Puccinia caricis-hebeiensis Jing X. Ji, Zhuang Li, Y. Li & Kakish. sp. nov. ( Fig. 10 )

MycoBank No: MB 838298.

Diagnosis: —This species is morphologically similar to P. caricis-atractylodis and P. vaginatae , but phylogenetically separated from these species.

Typus: — CHINA, Hebei Province, Cangzhou, Cangxian , telia on Carex sp. , 17 November. 2018, J. X. Ji, HMJAU 8895 , Holotype.

Etymology: —Named after host plant genus of the telial stages, and the locality of collection, Hebei Province.

Description: — Spermogonia, aecia and uredinia not found. Telia hypophyllous, compact, black, rounded to broadly elliptic, erumpent. Teliospores broadly clavate, ellipsoid, mostly conical and rounded at apices, weakly constricted at the septa, attenuate at the bases, 34.0–51.0 × 17.0–21.0 µm (av. 43.0 × 19.5 µm); walls brown, 0.6–1.4 µm (av. 0.9 µm) thick at sides, 5.4–8.6 µm (av. 6.9 µm) at apices; pedicels persistent, hyaline, 19.5–48.0 µm (av. 32.0 µm) long.

Additional specimens examined from CHINA:— Hebei Province, Cangzhou , telia on Carex sp. , 12 May 2019, HMJAU 8894 .

Hosts and distribution in China: —Telia on Carex sp. (Hebei Province).

Note:— Two specimens of the telial stage are included in this clade and they are morphologically similar and phylogenetically close to P. caricis-atractylodis and P. vaginatae . However, they are clearly separated from clades of these species ( Fig. 3 ), and are also slightly different in the shape and size of the teliospores, being slightly shorter and wider.

Figures

FIGURE 3. Phylogenetic tree of specimens on Cyperaceae and related host plants constructed by MP method based on ITS+28S regions of rDNA. Bootstrap values of MP and ML are followed by the Bayesian posterior probabilities (Bpp) on the nodes in the topology.Asterisk (*) represents bootstrap values or Bpp less than 50% in the topology. Sample data are shown with voucher specimen number or GenBank accession number, and host plant. Sequence data determined in this study are shown in color. Teliospore shapes are shown in each clade detected, and new species are shown by asterisk (*) on clades. 0, I: Spermogonial and aecial host genus. Asterisk (*) on host plants: Spermogonial and aecial host plants.

FIGURE 10. Puccinia caricis-hebeiensis on Carex sp. A. Telia on the lower leaf surface. B, C. Vertical section of a telium. Scale bars: B, C = 20 μm.