Lactarius pubescens (Fr.: Krombh.) Fr. + Betula

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Literature

• references
  Agerer R (1995) Anatomical characteristics of identified ectomycorrhizas: an attempt towards a natural classification. In Varma AK, Hock B (eds.) Mycorrhiza: Structure, function, molecular biology and biotechnology. Springer, Berlin, Heidelberg, pp. 685-734.
Giltrap NJ (1979) Experimental studies on the establishment and stability of ectomycorrhizas. PhD thesis, Univ Sheffield.
Ingleby K, Mason PA, Last FT, Fleming LV (1990) Identification of ectomycorrhizas. ITE Research Publication no. 5. HMSO, London.

Morphology

Morphology of the mycorrhizal system
• length
0 mm    Lower value of unspecified range (could be µ-s.d., but not known)
10 mm    Upper value of unspecified range (could be µ+s.d., but not known)
• ramification presence-type
  monopodial-pinnate
• ramification orders
0     Lower value of unspecified range (could be µ-s.d., but not known)
1     Upper value of unspecified range (could be µ+s.d., but not known)
• main axis diameter
0 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
  bent
or    sinuous
or    tortuous
• shape {of distal end}
  not inflated, cylindric
• colour
  brown
or    yellow
or    orange
or    white
• very tip colour
  yellowish
• older parts colour
  brown
or    yellow
or    red
• mantle cortical cells visibility
  not visible
• mantle {distinct} surface visibility
  present
• mantle transparency
  not transparent
• mantle laticifers visibility
  present
• mantle dots presence-colour
  absent
• mantle carbonizing presence
  absent
• mantle surface {in general} habit
  shiny
• emanating hyphae presence
  absent
Morphology of rhizomorphs
• diameter
0 mm    Lower value of unspecified range (could be µ-s.d., but not known)
0.2 mm    Upper value of unspecified range (could be µ+s.d., but not known)
• cross-section shape
  round or roundish
• colour
  concolourous to mantle
• ramification kind-frequency
  frequently, at restricted points
• origin location
  proximal
• margin habit
  smooth
Morphology of sclerotia
• presence
  absent

Anatomy

Anatomical features of the entire mycorrhiza
• emanating elements presence-type
  rhizomorphs
Anatomy of laticifers
• presence
  present
• location
  outer mantle layer
or    rhizomorphs
• shape
  straight and even
• ramification presence-abundance
  abundant
• cell diameter
0 µm    Lower value of unspecified range (could be µ-s.d., but not known)
8 µm    Upper value of unspecified range (could be µ+s.d., but not known)
Anatomical features of the mantle
Anatomy of the outer mantle layer apart from the ectormycorrhizal tip
• organisation
  plectenchymatous
• mantle type
  gelatinous matrix between the hyphae (type C)
• septa clamps presence
  absent
• cell diameter
2 µm    Lower value of unspecified range (could be µ-s.d., but not known)
5 µm    Upper value of unspecified range (could be µ+s.d., but not known)
• cell wall surface habit
  smooth
Anatomy of the middle mantle layer
• organisation
  pseudoparenchymatous
• hyphae arrangement
  plectenchymatous, without pattern
• cell diameter
0 µm    Lower value of unspecified range (could be µ-s.d., but not known)
10 µm    Upper value of unspecified range (could be µ+s.d., but not known)
• cell length
0 µm    Lower value of unspecified range (could be µ-s.d., but not known)
15 µm    Upper value of unspecified range (could be µ+s.d., but not known)
• cell wall surface habit
  smooth
Anatomy of the inner mantle layer
• organisation
  plectenchymatous
• hyphae arrangement
  without pattern
• septa clamps presence
  absent
• cell diameter
2 µm    Lower value of unspecified range (could be µ-s.d., but not known)
5 µm    Upper value of unspecified range (could be µ+s.d., but not known)
Anatomy of the mantle in longitudinal section
• mantle thickness {apart from tip}
10 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 of the Hartig net in longitudinal section
• presence
  present
• kind
  paraepidermal
Anatomy of the mantle in cross-section



Anatomy of the Hartig net in cross-section
• anatomy mantle cross-section hyphal cells around cortical (epidermal) cells thickness
2.5 µm    Lower value of unspecified range (could be µ-s.d., but not known)
12 µm    Upper value of unspecified range (could be µ+s.d., but not known)
• structure {in plan view}
  infrequently lobed
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
  undifferentiated; margins rather smooth; hyphae compactly arranged and of uniform diameter
(type B)
• internal nodia presence
  absent

Anatomy of hyphae in rhizomorphs

Chemical reactions

• reaction with toluidin blue presence
  present

Ecology

• geographic occurrence continent
  Europe

Tree

• plant family
  Betulaceae
• plant genus
  Betula
• plant habitat kind
  nursery
or    forests, woods

Fungus

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

Remarks

• public notes
  Mycorrhizal ends yellowish white to brownish orange; Hartig net penetrated to about a half of the epidermis.

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