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Review
. 2022 Feb 24;50(1):12-19.
doi: 10.1080/12298093.2022.2027683. eCollection 2022.

Paramyrothecium eichhorniae sp. nov., Causing Leaf Blight Disease of Water Hyacinth from Thailand

Umpawa Pinruan  1 , Jintana Unartngam  2 , Arm Unartngam  3 , Orawan Piyaboon  4 , Sujinda Sommai  1 , Phongsawat Khamsuntorn  1
Affiliations
Review

Paramyrothecium eichhorniae sp. nov., Causing Leaf Blight Disease of Water Hyacinth from Thailand

Umpawa Pinruan et al. Mycobiology. .

Abstract

Paramyrothecium eichhorniae sp. nov. was observed and collected from Chiang Mai and Phetchaburi Provinces, Thailand. This new species is introduced based on morphological and molecular evidence. This fungus is characterized by its production of sporodochium conidiomata with a white setose fringe surrounding an olivaceous green to dark green slimy mass of conidia, penicillately branched conidiophores, and aseptate and cylindrical to ellipsoid conidia. Phylogenetic analyses of combined LSU rDNA, ITS rDNA, tef1, rpb2, tub2 and cmdA sequence data using maximum parsimony, maximum likelihood and Bayesian approaches placed the fungus in a strongly supported clade with other Paramyrothecium species in Stachybotryaceae (Hypocreales, Sordariomycetes). The descriptions of the species are accompanied by illustrations of morphological features, and a discussion of the related taxa is presented.

Keywords: Stachybotryaceae; phylogenetics; plant pathogen; taxonomy.

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Conflict of interest statement

No potential conflict of interest was reported by the author(s).

Figures

Figure 1.
Figure 1.
Phylogenetic relationships of Paramyrothecium spp. from combined ITS, LSU, tef1, rpb2, tub2 and cmdA analyses. Bootstrap values (1,000 replicates) over 50% for MP and RAxML and over 0.95 for Bayesian posterior probabilities are added to the left of the nodes (MP/ML/PP), multiplied by 100; the blue lines in the tree represent bootstrap (BSMP and BSML) support of 100% and a posterior probability (BPP) of 1.00.
Figure 2.
Figure 2.
Paramyrothecium eichhorniae sp. nov. (BBH 48295, holotype). (a) Leaf blight disease symptom on water hyacinth. (b) Sporodochial conidiomata on substrate. (c) Sporodochial conidiomata on PDA. (d–f) Colonies on PDA, CMA, and OA after 15 days (left, from above; right, from below). (g–h) Setae. (i–j) Conidiogenous cells. (k–n) Conidia. Scale bars: a = 2 cm, b = 100 μm, c = 0.3 mm, d–f = 1 cm, g–h = 10 μm, and i–n = 5 μm.
Figure 3.
Figure 3.
(a) Symptoms of leaf blight disease of water hyacinth in nature. (b) Pathogenicity test by spraying the spore suspension on water hyacinth leaves; all of the inoculated leaves showed symptoms after 2 weeks inoculation.
See this image and copyright information in PMC

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