Puccinia adenocauli (Syd. & P. Syd.) J.X. Ji & Kakish.

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 : 232-233

C2: Puccinia adenocauli (Syd. & P. Syd.) J.X. Ji & Kakish. , Mycotaxon 132: 144, 2017. ( Fig. 5 )

Description:— Spermogonia subepidermal, flask-shaped, type 4 of Cummins & Hiratsuka (2003). Aecia subepidermal, erumpent, Aecidium-type with peridia and catenulate spores. Peridial cells firmly conjunct, cubic to polygonal, hyaline. Aeciospores catenulate, globose, obovoid or sometimes angular, 14–23 × 10–16 μm (av. 18 × 13 μm); walls hyaline, 0.6 μm thick, verrucose with big granules. Uredinia subepidermal, pale yellow, erumpent, without paraphyses. Urediniospores pedicellate, obovoid or ellipsoid, 17–25 × 13–18 μm (av. 21 × 15 μm); walls hyaline, echinulate, 1.6–1.2 μm (av. 0.9 μm), germ pores obscure. Telia subepidermal, erumpent, dark brown to black. Teliospores 2-celled by transverse septa, borne singly on pedicels, clavate to oblong with a round to obtuse apices and attenuate toward bases, constricted at septa, 21–45 × 7–20 μm (av. 32 × 10 μm); walls dark brown, smooth, 0.9 μm (av. 0.9 μm) thick, thickened at apices.

Specimens examined from northeastern CHINA: — Jilin Province, Changchun , spermogonia and aecia on Adenocaulon himalaicum Edgew. , 24 June 2016, HMJAU 8278 , 15 June 2015, HMJAU 8205 , 11 June 2016, HMJAU 8277 . Jilin Province, Jilin, spermogonia and aecia on A. himalaicum , 29 June 2017, HMJAU 8861 , 1 July 2018, HMJAU 8863 . Jilin Province, Tonghua , spermogonia, and aecia on A. himalaicum , 8 June 2016, HMJAU 8276 . Heilongjiang Province, Wuchang , spermogonia and aecia on A. himalaicum , 15 June 2019, HMJAU 8858 , 22 June 2017, HMJAU 8860 . Jilin Province, Changchun, Uredinia , and telia on Carex onoei Franch. & Sav. , 2 July 2016, HMJAU 8274 . Jilin Province, Jilin, uredinia and telia on C. onoei , 13 May 2016, HMJAU 8275 , 12 September 2017, HMJAU 8859 , 12 May 2018, HMJAU 8862 .

Hosts and distribution in northeastern CHINA ( Fig. 1 ): —Spermogonia and aecia on Adenocaulon himalaicum (Asteraceae) (A, B, C). Uredinia and telia on Carex onoei (A, B).

Note: —The life cycle of this species in China was confirmed by Ji et al. (2017). Morphological characteristics and host relations of this species are similar to those of P. carici-adenocauli Kakish., Yokoi & Harada ( Kakishima et al. 1999, Azbukina 2005, 2015). However, P. carici-adenocauli was renamed as P. adenocauli based on Aecidium adenocauli Syd. & P. Syd. according to the International Code of Nomenclature (Melbourne Code 2012) ( Ji et al. 2017). Spermogonial and aecial stages of this species on Adenocaulon , which are commonly found on the forest floor of hills and mountains in this area during spring to early summer.

Figures

FIGURE 1. Collection areas in northeastern China. A. Changchun area in Jilin Province. B. Jilin area in Jilin Province. C. Mountanious area in southern Heilongjiang Province. D. Area around Changbai Mountains in Jilin Province. E. Baicheng area in western Jilin Province. F. Yanbian area in eastern Jilin Province. G. Tonghua area in southeastern Jilin Province.

FIGURE 5. Puccinia adenocauli on Adenocaulon himalaicum (A–F) and Carex onoei (G–J). A. Plants producing spermogonia and aecia on the leaf surface. B. A vertical section of a spermogonium. C. Vertical section of an aecium surrounded with peridia. D. Aecia on the lower the leaf surface. E. An aecium observed under SEM. F. Aeciospores with granules on the surface observed under SEM. G. Uredinia on the lower leaf surface. H. A vertical section of a uredinium. I. Urediniospores.J. Teliospores. Scale bars: B, I, J = 20 μm, C, H = 30 μm, E = 100 μm, F = 5 μm.