Calonectria exiguispora

Ciri dan struktur

Phylogenetically close to C. piauiensis and C. brassianae but differs in having smaller macroconidia. Sexual morph not observed. Conidiophores scarce on SNA, consisting of conidiogenous apparatus and stipes, branched or simple. Stipes infrequent, elongated, septate, 75–273 µm long, 2–5 µm wide near base, tapering towards apex, simple or occasionally dichotomously branched, mostly being part of conidiogenous apparatus; vesicles terminal, slightly inflate to ellipsoidal, 2–5 µm wide. Conidiogenous apparatus hyaline, simple or branched in 1–3 (–4) tiers, uncommonly developing from stipes; main axis upright, septate, 20–275 × 3–7 µm; branches doliiform to cylindrical, primary branches 8–39 × 3–7 µm, secondary branches 8–24 × 2–6 µm, tertiary branches 10–23 × 2–5 µm, quarternary branches 10–14 × 3–4 µm. Conidiogenous cells holoblastic, hyaline, discrete, cylindrical to tapered above, often constricted near base, with periclinal thickening, 8–20 × 3–5 (11.8 ± 2.71 × 3.2 ± 0.5) µm. Macroconidia hyaline, cylindrical, round at apex, 1-septate, septum sub-median or median, guttulate, 21–40 × 3–4 (30.9 ± 4.09 × 3.5 ± 0.23) µm. Chlamydospores present, scarce, in clumps or in chains. Mega - and microconidia not observed. Colonies on 2% MEA in the dark for 6 d, white on surface, pale luteous in reverse, with moderate amount of aerial mycelium, with entire edges. Optimal growth temperature at 25 °C reaching 65.2 mm in 6 d, followed by 20 °C (57.3 mm), 15 °C (39.8 mm), 10 °C (19.7 mm), 5 °C (8.2 mm), no growth at 30 °C and 35 °C. Colonies kept at 30 °C and 35 °C being relocated to 25 °C for another 6 d revived (30 °C) and showed no growth (35 °C).

Sebagian uraian ditampilkan dalam bahasa sumber; terjemahannya belum tersedia atau belum lolos pemeriksaan.

Rujukan: [1]

Pengukuran mengikuti objek, spesimen atau kultur, dan metode yang disebutkan sumber. Baca uraian asli untuk konteks lengkap.

Habitat dan peran ekologis

Calonectria exiguispora is a member of the C. candelabrum species complex (Liu et al. 2020). It shares some characteristics with other species in the complex, such as 1-septate macroconidia and ‘ellipsoidal to obpyriform’ shape vesicle. However, it can be distinguished from most species in the complex by its smaller conidial dimensions (21–40 × 3–4 µm, avg. 30.9 × 3.5 µm) except for C. brevistipitata (29–35 × 3–4 µm, avg. 31 × 3.5 µm, isolated from Mexican soil) and C. stipitate (27–37 × 3–6, avg. 32 × 4 µm, isolated from Colombian Eucalyptus sp.) (Lombard et al. 2016). Nevertheless, these two species are distantly related to C. exiguispora (Fig. 3). Recently Liu et al. (2020) reduced C. stipitata to synonymy with C. spathulata, the conidial dimensions of which range from 48–100 × 4–6 µm (avg. 80 × 6 µm). They regarded the smaller conidial dimensions of C. “ stipitata ” as representing intraspecific variation. Calonectria exiguispora is phylogenetically closely related to C. piauiensis and C. brassianae, which were isolated from soils associated with Eucalyptus brassiana trees in Brazil (Alfenas et al. 2015). These two species, however, have much larger conidial dimensions: C. piauiensis (38–60 × 3–5 µm, avg. 49 × 4.5 µm) and C. brassianae (35–65 × 3–5 µm, avg. 53 × 4 µm) (Alfenas et al. 2015).

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Rujukan: [1]

Habitat atau konteks temuan

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Substrat

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Peran atau konteks

Belum dikategorikan pada rilis ini.

Reproduksi

Sexual morph not observed. Conidiophores scarce on SNA, consisting of conidiogenous apparatus and stipes, branched or simple. Stipes infrequent, elongated, septate, 75–273 µm long, 2–5 µm wide near base, tapering towards apex, simple or occasionally dichotomously branched, mostly being part of conidiogenous apparatus; vesicles terminal, slightly inflate to ellipsoidal, 2–5 µm wide. Conidiogenous apparatus hyaline, simple or branched in 1–3 (–4) tiers, uncommonly developing from stipes; main axis upright, septate, 20–275 × 3–7 µm; branches doliiform to cylindrical, primary branches 8–39 × 3–7 µm, secondary branches 8–24 × 2–6 µm, tertiary branches 10–23 × 2–5 µm, quarternary branches 10–14 × 3–4 µm.

Sebagian uraian ditampilkan dalam bahasa sumber; terjemahannya belum tersedia atau belum lolos pemeriksaan.

Rujukan: [1]

Catatan identitas dan cakupan

• Nama diterima mengikuti Catalogue of Life Base2026-09-11; uraian mempertahankan konsep dan nama sumber aslinya.
• Preserve original treatment localities, hosts and substrate scope. Materials examined describe documented specimens, not the full global range.
• Impor dan terjemahan otomatis belum diperiksa editorial per profil. Struktur reproduktif yang disebutkan tidak membuktikan seluruh siklus hidup diketahui.
• Pengukuran pada uraian mengikuti spesimen, kultur, dan metode sumber; angka tidak diperluas ke semua populasi.

Melihat dengan konteks

Micrographs of Calonectria exiguispora sp. nov. (ex-holotype: CMW 49752 = CMW-IA 160). A conidiophores formed on SNA B stipes and vesicles C conidiogenous apparatus D chlamydospores E conidia (× 400) F conidia (×1 000). Scale bars: 100 µm (A); 50 µm (D, E); 25 µm (C); 10 µm (B, F).

Jenis

Pelat ilmiah

Kredit

Nam Q. Pham, Seonju Marincowitz, ShuaiFei Chen, Carlos A. Rodas, Michael J. Wingfield

Lisensi

CC BY 4.0

Sumber media

Buka entri sumber

Gambar menunjukkan objek menurut identifikasi sumber, bukan verifikasi independen spesimen oleh Fungi. Tidak ada skala baru yang ditambahkan.

Dokumentasi tambahan

Sumber profil

1. [1] Soil-borne Calonectria (Hypocreales, Nectriaceae) associated with Eucalyptus plantations in Colombia — Calonectria exiguisporaBagian sumber: PMC9836433_section_10
   Tanggal penghimpunan sumber: 2026-10-12
   Teks sumber: CC BY 4.0 · Pham NQ, Marincowitz S, Chen S, Rodas CA, Wingfield MJ.
2. [2] Catalogue of Life Base2026-09-11 — Calonectria exiguisporaBagian sumber: ColDP NameUsage.tsv ID B2X6N; accepted species; source 2073
   Tanggal penghimpunan sumber: 2026-10-12
3. [3] Dokumentasi visual — Calonectria exiguisporaBagian sumber: Identitas mengikuti sumber dokumentasi; bukan penentuan spesimen independen.
   Tanggal penghimpunan sumber: 2026-10-17
   Media sumber: CC BY 4.0 · Nam Q. Pham, Seonju Marincowitz, ShuaiFei Chen, Carlos A. Rodas, Michael J. Wingfield
4. [4] Dokumentasi visual — Calonectria exiguisporaBagian sumber: Identitas mengikuti sumber dokumentasi; bukan penentuan spesimen independen.
   Tanggal penghimpunan sumber: 2026-10-17
   Teks sumber: CC BY 4.0 · Nam Q. Pham, Seonju Marincowitz, ShuaiFei Chen, Carlos A. Rodas, Michael J. Wingfield