Xerocomus subtomentosus (L. : Fr.) Quel. + Quercus

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Literature

• references
  Palfner G (1995) Xerocomus subtomentosus. In Agerer R (ed) Colour Atlas of Ectomycorrhizae, plate 90, Einhorn-Verlag, Schwäbisch Gmünd.
Palfner G, Agerer R (1995) Sind die Ektomykorrhizen von Xerocomus subtomentosus und X. armeniacus anatomisch unterscheidbar? Z Mykol 61(1): 45-58.

Morphology

Morphology of the mycorrhizal system
• length
1.4 mm    Minimum value
3.4 mm    Mean (= average)
7.6 mm    Maximum value
• ramification presence-type
  monopodial-pyramidal
• ramification orders
0     Lower value of unspecified range (could be µ-s.d., but not known)
2     Upper value of unspecified range (could be µ+s.d., but not known)
• abundance
  solitary or in small numbers
• main axis diameter
0.3 mm    Minimum value
0.4 mm    Mean (= average)
0.5 mm    Maximum value
• rhizomorphs as stout, short, conical structures presence-abundance
  absent
• rhizomorphs as short mycorrhiza-like outgrowths with blunt tips presence
  absent
• rhizomorphs presence
  present
• rhizomorphs frequency
  infrequent
• exploration type
  long distance
Morphology of the unramified ends
• shape
  bent
or    sinuous
• shape {of distal end}
  not inflated, cylindric
or    tapering
• length
0 mm    Lower value of unspecified range (could be µ-s.d., but not known)
2.6 mm    Upper value of unspecified range (could be µ+s.d., but not known)
• diameter
0.3 mm    Mean (= average)
0.4 mm    Maximum value
• colour
  yellow
or    white
• mantle cortical cells visibility
  not visible
• mantle {distinct} surface visibility
  present
• mantle transparency
  not transparent
• mantle laticifers visibility
  absent
• mantle dots presence-colour
  absent
• mantle carbonizing presence
  absent
• mantle surface {in general} habit
  silvery
or    smooth
or    not smooth
• mantle surface {in detail} kind
  forming rings (reticulate)
• emanating hyphae presence
  present
• emanating hyphae abundance
  infrequent
Morphology of rhizomorphs
• diameter
0 mm    Lower value of unspecified range (could be µ-s.d., but not known)
0.3 mm    Upper value of unspecified range (could be µ+s.d., but not known)
• cross-section shape
  round or roundish
• colour
  yellow
or    yellowish
• ramification kind-frequency
  frequently, at restricted points
or    infrequently, at restricted points
• connection to mantle kind
  distinct
• origin location
  not specific
or    proximal
• margin habit
  smooth
• dimorphism presence
  absent
Morphology of sclerotia
• presence
  absent

Anatomy

Anatomical features of the entire mycorrhiza
• emanating elements presence-type
  rhizomorphs
Anatomy of laticifers
• presence
  absent
Anatomical features of the mantle
Anatomy of the outer mantle layer apart from the ectormycorrhizal tip
• organisation
  plectenchymatous
• mantle type
  ring-like arrangement of hyphal bundles (type A)
• septa thickness {relative to cell walls}
  thinner than walls
and    as thick as walls
• septa clamps presence
  absent
• cell shape
  cylindric, not constricted at septa
• cell pigment location-colour
  membranaceously yellowish
and    plasmatically yellowish
• cell diameter
4 µm    Minimum value
5 µm    Mean (= average)
7 µm    Maximum value
• cell length
7 µm    Minimum value
28 µm    Mean (= average)
46 µm    Maximum value
• cell wall thickness
0.2 µm    Lower value of unspecified range (could be µ-s.d., but not known)
0.5 µm    Upper value of unspecified range (could be µ+s.d., but not known)
• cell wall surface habit
  rough
• drops of exuded pigment presence
  absent
Anatomy of the middle mantle layer
• organisation
  plectenchymatous
• cell pigment location-colour
  colourless
• cell diameter
3 µm    Minimum value
6 µm    Mean (= average)
10 µm    Maximum value
• cell length
5 µm    Minimum value
18 µm    Mean (= average)
40 µm    Maximum value
• cell wall thickness
0.2 µm    Lower value of unspecified range (could be µ-s.d., but not known)
0.5 µm    Upper value of unspecified range (could be µ+s.d., but not known)
• cell wall surface habit
  rough
Anatomy of the inner mantle layer
• organisation
  plectenchymatous with pseudoparenchymatous nests of cells
• hyphae arrangement
  ring-like
• septa clamps presence
  absent
• cell pigment location-colour
  absent
• cell diameter
2 µm    Minimum value
4 µm    Mean (= average)
6 µm    Maximum value
• cell length
4 µm    Minimum value
15 µm    Mean (= average)
35 µm    Maximum value
• cell contents presence-kind
  absent
Anatomy of the mantle in longitudinal section
• mantle thickness {apart from tip}
12 µm    Minimum value
35 µm    Mean (= average)
50 µm    Maximum value
• mantle different layers presence
  discernable
• outer mantle layer organisation
  plectenchymatous
• outer mantle layer hyphae tangentially length
4 µm    Minimum value
12 µm    Mean (= average)
48 µm    Maximum value
• outer mantle layer hyphae radially diameter
2 µm    Minimum value
4 µm    Mean (= average)
6 µm    Maximum value
• middle mantle layer organisation
  pseudoparenchymatous
• middle mantle layer hyphae tangentially length
3 µm    Minimum value
9 µm    Mean (= average)
26 µm    Maximum value
• middle mantle layer hyphae radially diameter
2 µm    Minimum value
7 µm    Mean (= average)
15 µm    Maximum value
• inner mantle layer organisation
  pseudoparenchymatous
• inner mantle layer hyphae tangentially length
3 µm    Minimum value
5 µm    Mean (= average)
10 µm    Maximum value
• inner mantle layer hyphae radially diameter
2 µm    Minimum value
4 µm    Mean (= average)
6 µm    Maximum value

Anatomy of the tannin cells in longitudinal section
• presence
  absent

Anatomy of the cortical cells in longitudinal section
• anatomy mantle longitudinal section cortical (epidermal) cells shape
  tangentially-oval to -elliptic or -cylindrical, and oriented obliquely
• anatomy mantle longitudinal section cortical (epidermal) cells tangentially length
10 µm    Minimum value
12 µm    Mean (= average)
20 µm    Maximum value
• anatomy mantle longitudinal section cortical (epidermal) cells radially diameter
35 µm    Minimum value
51 µm    Mean (= average)
60 µm    Maximum value
• anatomy mantle longitudinal section cortical (epidermal) cells mean shape-ratio CCq (ECq)
0.24     Mean (= average)

Anatomy of the Hartig net in longitudinal section
• presence
  present
• kind
  paraepidermal
• structure {in plan view}
  of palmetti type
• lobes width
2 µm    Minimum value
3 µm    Mean (= average)
5 µm    Maximum value
Anatomy of the mantle in cross-section
• mantle different layers presence
  discernible
• outer mantle layer organisation
  plectenchymatous
• outer mantle layer hyphae tangentially length
4 µm    Minimum value
12 µm    Mean (= average)
48 µm    Maximum value
• outer mantle layer hyphae radially diameter
2 µm    Minimum value
4 µm    Mean (= average)
6 µm    Maximum value
• middle mantle layer organisation
  pseudoparenchymatous
• middle mantle layer hyphae tangentially length
3 µm    Minimum value
9 µm    Mean (= average)
26 µm    Maximum value
• middle mantle layer hyphae radially diameter
2 µm    Minimum value
7 µm    Mean (= average)
15 µm    Maximum value
• inner mantle layer organisation
  pseudoparenchymatous
• inner mantle layer hyphae tangentially length
3 µm    Minimum value
5 µm    Mean (= average)
10 µm    Maximum value
• inner mantle layer hyphae radially diameter
2 µm    Minimum value
4 µm    Mean (= average)
6 µm    Maximum value

Anatomy of the tannin cells in cross-section
• presence
  absent
• shape
  radially-oval to -elliptic

Anatomy of the cortical cells in cross-section
• anatomy mantle cross-section cortical (epidermal) cells tangentially length
4 µm    Minimum value
8 µm    Mean (= average)
11 µm    Maximum value
• anatomy mantle cross-section cortical (epidermal) cells radially diameter
7 µm    Minimum value
13 µm    Mean (= average)
20 µm    Maximum value
• anatomy mantle cross-section cortical (epidermal) cells mean shape-ratio CCq
0.6     Mean (= average)

Anatomy of the Hartig net in cross-section
• presence
  present
• kind
  apparently one and a half row deep
• anatomy mantle cross-section hyphal cells around cortical (epidermal) cells shape
  roundish
• anatomy mantle cross-section hyphal cells around cortical (epidermal) cells thickness
1 µm    Minimum value
2 µm    Mean (= average)
3 µm    Maximum value
• anatomy mantle cross-section hyphal rows around cortical (epidermal) cells number
  one
Anatomy of the emanating elements in general
• backwards-oriented clamps presence
  absent
Anatomy of cystidia


Anatomy of emanating hyphae


Anatomy of the septa of emanating hyphae
• clamps presence
  absent
• clamps hole presence
  absent
• clamps blister-like structure {at basis} presence
  absent


Anatomy of the cells of emanating hyphae
• anatomy emanating elements emanating hyphae cell wall surface habit
  rough of warts
• anatomy emanating elements emanating hyphae cell wall surface structures shape
  hemispherical warts


Anatomy of rhizomorphs
• type
  highly differentiated; thick hyphae forming mostly a core, septa often partially or completely dissolved
(type F)
• nodia presence
  present
• internal nodia presence
  absent
• gelatinous matrix presence
  absent
• gelatinized hyphae presence
  absent
• cup-like structures on surface presence
  absent
• conical young side-branches presence
  present
• a "ball" of intertwined, ramified, thin hyphae presence
  absent

Anatomy of hyphae in rhizomorphs
• contents presence-kind
  filled with brownish or yellowish substances
• ampullate, trumpet-like inflated presence
  absent
Anatomy of vessel-like or thickened hyphae in rhizomorphs
• anatomy emanating elements rhizomorphs hyphae contents presence-kind
  filled with brownish or yellowish substances
• anatomy emanating elements rhizomorphs hyphae ampullate, trumpet-like inflated presence
  absent
Anatomy of central non-vessel-like hyphae in rhizomorphs
• anatomy emanating elements rhizomorphs hyphae contents presence-kind
  filled with brownish or yellowish substances
• anatomy emanating elements rhizomorphs hyphae ampullate, trumpet-like inflated presence
  absent
Anatomy of peripheral hyphae in rhizomorphs
• anatomy emanating elements rhizomorphs hyphae contents presence-kind
  filled with brownish or yellowish substances
• anatomy emanating elements rhizomorphs hyphae ampullate, trumpet-like inflated presence
  absent
Anatomy of solitary thick-walled hyphae in rhizomorphs
• anatomy emanating elements rhizomorphs hyphae contents presence-kind
  filled with brownish or yellowish substances
• anatomy emanating elements rhizomorphs hyphae ampullate, trumpet-like inflated presence
  absent
Anatomy of chlamydospores
• presence
  absent
Anatomy of haustoria
• {of ectomycorrhiza former} presence
  absent
• {of foreign origin} presence
  absent
Anatomy of nuclei
• number {per cell}
2     Mean (= average)
• shape
  round
• diameter
1.2 µm    Minimum value
1.4 µm    Mean (= average)
1.6 µm    Maximum value
• length
1.2 µm    Minimum value
1.4 µm    Mean (= average)
1.6 µm    Maximum value
• distance {between each other}
0 µm    Minimum value
0.3 µm    Mean (= average)
1.6 µm    Maximum value

Autofluorescence

• whole mycorrhizae UV 254 nm colour-presence
  absent
• whole mycorrhizae UV 366 nm colour-presence
  absent
• mantle in section UV-filter 340-380 nm presence
  present
• mantle in section blue-filter, 450-490 nm presence
  present
• mantle in section green-filter, 530-560 nm presence
  absent

Chemical reactions

• reaction with acid fuchsin presence
  present
• reaction with anilin presence
  present
• reaction with brillant-cresyl-blue presence
  present
• reaction with cotton-blue-lactic-acid presence
  present
• reaction with ethanol 70% presence
  absent
• reaction with FeSO4 presence
  present
• reaction with formol 40% presence
  absent
• reaction with guaiac presence
  present
• reaction with KOH 10% presence
  present
• reaction with lactic acid presence
  absent
• reaction with Melzer's reagent presence
  absent
• reaction with phenole presence
  present
• reaction with phenole-aniline presence
  present
• reaction with ruthenium-red presence
  present
• reaction with sulpho-vanillin presence
  absent

Ecology

• substrate
  in organic layer
• geographic occurrence continent
  Europe
• knowledge about association with foreign fruitbodies presence
  unknown

Tree

• plant family
  Fagaceae
• plant genus
  Quercus
• plant habitat kind
  forests, woods

Fungus

• family
  Boletaceae
• subfamily
  Boletaceae subf. Xerocomoideae
• fruitbodies growth habit
  epigeous
or    pileate-porioid

Remarks

• public notes
  Mycorrhizal ends lemon-yellow or whitish yellow due to silvery appearance, where air between mantle hyphae displaced by water brownish root colour visible; rhizomorphs lemon-yellow to whitish yellow; tips of short mantle hyphae sometimes somewhat cystidia-like inflated; autofluorescence of mantle in section with UV-filter with some mantle cells (solitary or in groups) distinctly whitish to light grey, with blue-filter the same cells yellowish white or yellow-brown; mantle in KOH light brown, in guaiac inner mantle layers grey, in FeSO4 grey-green to yellowish, in brillant-cresyl-blue blue, in cotton-blue green-blue, in phenole-aniline inner mantle layers grey, in phenole inner mantle layers grey, in aniline inner mantle layers grey, in acid fuchsin dark reddish to lilac, in ruthenium red grey-brown to tobacco-brown, in safranine deeply red.

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