Funneliformis huaxica M.Y. Suo, C.L. Long, R.J. He, D.Y. Chen & L. Jiang, 2025

Suo, Man-Yu, Long, Chun-Li, He, Rong-Jian, Chen, De-Yao & Jiang, Long, 2025, Funneliformis huaxica, a new species of arbuscular mycorrhizal fungi (Glomeromycota) from Guiyang, China, Phytotaxa 715 (1), pp. 72-80 : 76-77

publication ID	https://doi.org/10.11646/phytotaxa.715.1.5
persistent identifier	https://treatment.plazi.org/id/03E387DF-4748-6E4C-FF0E-CE925A84FD60
treatment provided by	Felipe
scientific name	Funneliformis huaxica M.Y. Suo, C.L. Long, R.J. He, D.Y. Chen & L. Jiang
status	sp. nov.

Treatment

Funneliformis huaxica M.Y. Suo, C.L. Long, R.J. He, D.Y. Chen & L. Jiang , sp. nov. Figs 2A–H View FIGURE 2

Fungal Name FN 572509

Etymology:— huaxica , meaning "HuaXi", indicating that this species was initially discovered in Huaxi District, Guiyang City, China.

Diagnosis:— Differs from F. geosporum by having no reaction in Melzer's reagent, and separated by analysis of the 18S-ITS-28S rDNA region and RPB1 gene sequence.

Holotype:— HMAS 353838 View Materials ( Fungarium , Institute of Microbiology, Chinese Academy of Sciences).

Description:— Sporocarps: Unknown. Spores: Produced singly in soil, pale yellow, spherical to sub-spherical, occasionally ellipsoidal or irregular. Spores 104–213 × 135–246 μm, contents colorless with transparent oil droplets of varying sizes, showing no reaction to Melzer's reagent; wall composed of three distinct layers (sw1, sw2, sw3), with sw1 being a transient wall, hyaline, about 0.5–2.5 μm thick, showing no reaction to Melzer's reagent; sw2 is a lamellar wall, pale yellow to yellow-brown, about 0.4–1.5 μm thick, thickening to 4.5 μm at the base of the spore, showing no reaction to Melzer's reagent; sw3 is light yellow to yellow-brown, about 0.6 μm thick, usually tightly adhering to sw2 even in vigorously crushed spores, showing no reaction to Melzer's reagent. Subtending hypha single, funnel-shaped, connection point width ranging from 16–25 μm, light yellow to yellow-brown, straight or curved, hyphal wall (shw1, shw2, shw3) continues from sw1, sw2, sw3, connection pore is closed by a septum formed by shw3.

Mycorrhizal associations:— In natural conditions, this fungus was found in the rhizosphere soil of Uncaria rhynchophylla . In greenhouse conditions, it successfully formed intraradical hyphae and arbuscules within the roots of Sorghum bicolor .

Specimens examined:— Rhizosphere soil of Uncaria rhynchophylla, Huaxi District, Guiyang City , Guizhou Province ( 26°27′12”N, 106°39′21”E GoogleMaps ; elevation 1097.5 m. Slides with spores permanently mounted with PVLG and PVLG + Melzer's reagent were deposited. Holotype deposited in Fungarium ( HMAS), ( HMAS 353838 View Materials ). Isotypes deposited in the Plant Physiology Laboratory of Guizhou University ( DG _HX_ G01 – G05 ) .

Distribution and habitat:— Rhizosphere soil of Uncaria rhynchophylla . The soil is classified as yellow earth. The climate of this area belongs to a plateau monsoon humid climate, with an average annual temperature of 15.7 °C and an average annual rainfall of 1469.6 mm.