Lactarius acris Bolt. : Fr. + Fagus

– Item listing –

– Enlarged view –

Literature

• references
  Brand F (1991) Ektomykorrhizen an Fagus sylvatica. Charakterisierung und Identifizierung, ökologische Kennzeichnung und unsterile Kultivierung. Libri Botanici 2: 1-229.
Brand F (1992) Lactarius acris. In Agerer R (ed) Colour Atlas of Ectomycorrhizae, plate 72, Einhorn-Verlag, Schwäbisch Gmünd.

Morphology

Morphology of the mycorrhizal system
• length
0 mm    Lower value of unspecified range (could be µ-s.d., but not known)
6 mm    Upper value of unspecified range (could be µ+s.d., but not known)
• ramification presence-type
  monopodial-pyramidal
or    coralloid
• tips {per 10 mm} number
15     Lower value of unspecified range (could be µ-s.d., but not known)
32     Upper value of unspecified range (could be µ+s.d., but not known)
• main axis diameter
0.3 mm    Lower value of unspecified range (could be µ-s.d., but not known)
0.4 mm    Upper value of unspecified range (could be µ+s.d., but not known)
• 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
Morphology of the unramified ends
• shape
  straight
or    bent
• shape {of distal end}
  not inflated, cylindric
• length
0 mm    Lower value of unspecified range (could be µ-s.d., but not known)
1 mm    Upper value of unspecified range (could be µ+s.d., but not known)
• diameter
0.25 mm    Lower value of unspecified range (could be µ-s.d., but not known)
0.35 mm    Upper value of unspecified range (could be µ+s.d., but not known)
• colour
  white
• very tip colour
  white
or    whitish
• older parts colour
  brown
or    red
or    white
• mantle cortical cells visibility
  not visible
• mantle {distinct} surface visibility
  present
• mantle transparency
  not transparent
• mantle laticifers visibility
  absent
• mantle secreted latex {after scratching mantle} presence
  present
• mantle secreted latex {after scratching mantle} colour-habit
  white, reddish after some minutes
• mantle dots presence-colour
  absent
• mantle carbonizing presence
  absent
• mantle surface {in general} habit
  silvery
or    smooth
• emanating hyphae presence
  absent
Morphology of rhizomorphs
• diameter
0 mm    Lower value of unspecified range (could be µ-s.d., but not known)
0.03 mm    Upper value of unspecified range (could be µ+s.d., but not known)
• colour
  concolourous to mantle
• 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
  present
• location
  middle mantle layer
or    rhizomorphs
• shape
  straight and even
• cell diameter
5.5 µm    Mean (= average)
9 µm    Maximum value
Anatomical features of the mantle
• matrix presence
  present
• matrix location
  middle mantle layer
Anatomy of the outer mantle layer apart from the ectormycorrhizal tip
• organisation
  plectenchymatous
• mantle type
  hymeniform, stout and often slightly curved hyphal end-cells, filled with oily droplets which stain in sulpho-vanillin (type I)
• septa clamps presence
  absent
• cell pigment location-colour
  absent
• cell diameter
3 µm    Lower value of unspecified range (could be µ-s.d., but not known)
4 µm    Upper value of unspecified range (could be µ+s.d., but not known)
• cell length
10 µm    Mean (= average)
• cell wall thickness
0.2 µm    Mean (= average)
• cell wall surface habit
  smooth
and    with few soil particles
• drops of exuded pigment presence
  absent
Anatomy of the middle mantle layer
• organisation
  plectenchymatous
• matrix kind
  not gelatinous
• hyphae arrangement
  plectenchymatous, without pattern
• cell pigment location-colour
  colourless
• cell diameter
2 µm    Lower value of unspecified range (could be µ-s.d., but not known)
3 µm    Upper value of unspecified range (could be µ+s.d., but not known)
• cell wall thickness
0.2 µm    Mean (= average)
• cell wall surface habit
  smooth
Anatomy of the inner mantle layer
• organisation
  plectenchymatous
• hyphae arrangement
  without pattern
• septa clamps presence
  absent
• cell pigment location-colour
  absent
• cell diameter
3 µm    Lower value of unspecified range (could be µ-s.d., but not known)
6 µm    Upper value of unspecified range (could be µ+s.d., but not known)
Anatomy of the outer mantle layer of the ectormycorrhizal tip
• anatomy mantle outer mantle layer {of ectomycorrhizal tip} organisation
  like other parts of mantle
Anatomy of the mantle in longitudinal section
• mantle thickness {apart from tip}
35 µm    Lower value of unspecified range (could be µ-s.d., but not known)
45 µm    Upper value of unspecified range (could be µ+s.d., but not known)
50 µm    Maximum value
• mantle different layers presence
  discernable
• outer mantle layer organisation
  plectenchymatous
• outer mantle layer hyphae tangentially length
2.5 µm    Lower value of unspecified range (could be µ-s.d., but not known)
4 µm    Upper value of unspecified range (could be µ+s.d., but not known)
• outer mantle layer hyphae radially diameter
10 µm    Mean (= average)
• middle mantle layer organisation
  plectenchymatous
• middle mantle layer hyphae radially diameter
1 µm    Lower value of unspecified range (could be µ-s.d., but not known)
3 µm    Upper value of unspecified range (could be µ+s.d., but not known)
• inner mantle layer organisation
  plectenchymatous
• inner mantle layer hyphae radially diameter
3 µm    Lower value of unspecified range (could be µ-s.d., but not known)
6 µm    Upper value of unspecified range (could be µ+s.d., but not known)
• laticifers diameter
8 µm    Mean (= average)

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
  radially-oval to -elliptic, oriented obliquely
• anatomy mantle longitudinal section cortical (epidermal) cells radially diameter
23 µm    Lower value of unspecified range (could be µ-s.d., but not known)
41 µm    Upper value of unspecified range (could be µ+s.d., but not known)
• anatomy mantle longitudinal section cortical (epidermal) cells mean tangential length CCt (ECt)
8 µm    Lower value of unspecified range (could be µ-s.d., but not known)
22 µm    Upper value of unspecified range (could be µ+s.d., but not known)
• anatomy mantle longitudinal section cortical (epidermal) cells mean shape-ratio CCq (ECq)
0.3     Minimum value
0.4     Mean (= average)
0.6     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
2.5 µm    Lower value of unspecified range (could be µ-s.d., but not known)
4 µm    Upper value of unspecified range (could be µ+s.d., but not known)
• outer mantle layer hyphae radially diameter
10 µm    Mean (= average)
• middle mantle layer organisation
  plectenchymatous
• middle mantle layer hyphae radially diameter
1 µm    Lower value of unspecified range (could be µ-s.d., but not known)
3 µm    Upper value of unspecified range (could be µ+s.d., but not known)
• inner mantle layer organisation
  plectenchymatous
• inner mantle layer hyphae radially diameter
3 µm    Lower value of unspecified range (could be µ-s.d., but not known)
6 µm    Upper value of unspecified range (could be µ+s.d., but not known)
• laticifers diameter
8 µm    Mean (= average)

Anatomy of the tannin cells in cross-section
• presence
  absent

Anatomy of the cortical cells in cross-section
• anatomy mantle cross-section cortical (epidermal) cells shape
  round
or    radially-oval to -elliptic
• anatomy mantle cross-section cortical (epidermal) cells tangentially length
13 µm    Lower value of unspecified range (could be µ-s.d., but not known)
24 µm    Upper value of unspecified range (could be µ+s.d., but not known)
• anatomy mantle cross-section cortical (epidermal) cells radially diameter
15 µm    Lower value of unspecified range (could be µ-s.d., but not known)
35 µm    Upper value of unspecified range (could be µ+s.d., but not known)
• anatomy mantle cross-section cortical (epidermal) cells mean shape-ratio CCq
0.5     Minimum value
0.8     Mean (= average)
1.1     Maximum value

Anatomy of the Hartig net in cross-section
• anatomy mantle cross-section hyphal cells around cortical (epidermal) cells shape
  roundish
• anatomy mantle cross-section hyphal cells around cortical (epidermal) cells thickness
2 µm    Lower value of unspecified range (could be µ-s.d., but not known)
3 µm    Upper value of unspecified range (could be µ+s.d., but not known)
• lobes width
0.5 µm    Lower value of unspecified range (could be µ-s.d., but not known)
3.5 µm    Upper value of unspecified range (could be µ+s.d., but not known)
• structure {in plan view}
  of palmetti type
Anatomy of the emanating elements in general
Anatomy of cystidia


Anatomy of emanating hyphae


Anatomy of the septa of emanating hyphae
• clamps presence
  absent




Anatomy of rhizomorphs
• type
  slightly differentiated; central hyphae somewhat enlarged
(type C)
• cup-like structures on surface presence
  absent
• a "ball" of intertwined, ramified, thin hyphae presence
  absent

Anatomy of hyphae in rhizomorphs
• ampullate, trumpet-like inflated presence
  absent
Anatomy of vessel-like or thickened hyphae in rhizomorphs
• 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 ampullate, trumpet-like inflated presence
  absent
Anatomy of peripheral hyphae in rhizomorphs
• anatomy emanating elements rhizomorphs hyphae ampullate, trumpet-like inflated presence
  absent
Anatomy of solitary thick-walled hyphae in rhizomorphs
• anatomy emanating elements rhizomorphs hyphae ampullate, trumpet-like inflated presence
  absent
Anatomy of chlamydospores
• presence
  absent
Anatomy of haustoria
• {of ectomycorrhiza former} presence
  present
• {of ectomycorrhiza former} abundance
  consistently present
• shape
  as small racemes
• diameter
1.5 µm    Lower value of unspecified range (could be µ-s.d., but not known)
2 µm    Upper value of unspecified range (could be µ+s.d., but not known)
Anatomy of nuclei
• number {per cell}
2     Mean (= average)
• shape
  round
• diameter
2 µm    Mean (= average)
• length
2 µm    Mean (= average)
• distance {between each other}
1 µm    Lower value of unspecified range (could be µ-s.d., but not known)
7 µm    Upper value of unspecified range (could be µ+s.d., but not known)

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

Chemical reactions

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

Ecology

• substrate
  in organically enriched mineral horizon
• geographic occurrence continent
  Europe
• knowledge about association with foreign fruitbodies presence
  unknown

Tree

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

Fungus

• family
  Russulaceae
• subgenus-section
  Lactarius sect. Plinthogali
• fruitbodies growth habit
  epigeous
or    pileate-lamellate

Remarks

• public notes
  Mycorrhizal ends infrequently slightly bent, light brown to red-brown with a weak whitish net where air lacking, older parts darker reddish brown; perpendicularly protruding outer mantle cells possibly could be regarded as cystidia; peripheral hyphae of rhizomorphs with thickened cell walls; in longitudinal sections Hartig net 1(-2) cortical cell layers deep, in cross-sections 1-3; autofluorescence of mantle in section with UV-filter creamy-white to bluish-white; mantle in sulfo-vanillin with latex of laticifers and hyphal ends of outer mantle layer slightly colouring dark violet, in cotton-blue cell walls blue.

– Item listing –