Lactarius omphaliformis Romagn. + Alnus

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Literature

references
  Pritsch K, Becerra A, Polme S, Tedersoo L, Schloter M, Agerer R (2010) Description and identification of Alnus acuminata ectomycorrhizae from Argentinean alder stands. Mycologia 102(6): 1263-1273

Morphology

Morphology of the mycorrhizal system
length
0 mm    Lower value of unspecified range (could be µ-s.d., but not known)
18 mm    Upper value of unspecified range (could be µ+s.d., but not known)
ramification presence-type
  monopodial-pinnate
or    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
rhizomorphs as stout, short, conical structures presence-abundance
  absent
rhizomorphs as short mycorrhiza-like outgrowths with blunt tips presence
  absent
rhizomorphs presence
  absent
exploration type
  contact
Morphology of the unramified ends
shape
  bent
or    sinuous [almost]
shape {of distal end}
  not inflated, cylindric
length
0 mm    Lower value of unspecified range (could be µ-s.d., but not known)
15 mm    Upper value of unspecified range (could be µ+s.d., but not known)
diameter
0.2 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)
colour
  ochre, yellowish brown
or    orange
very tip colour
  yellowish
older parts colour
  brown
mantle cortical cells visibility
  not visible
mantle {distinct} surface visibility
  present
mantle transparency
  not transparent
mantle dots presence-colour
  absent
mantle carbonizing presence
  absent
mantle surface {in general} habit
  smooth
or    covered with soil particles
emanating hyphae presence
  present
emanating hyphae abundance
  infrequent
Morphology of sclerotia
presence
  absent

Anatomy

Anatomical features of the entire mycorrhiza
emanating elements presence-type
  emanating hyphae
crystals presence
  absent
blue granules presence
  absent
Anatomy of laticifers
presence
  present
anatomy entire mycorrhiza laticiferous solitary (gloeoplerous) cells presence
  present
Anatomical features of the mantle
completeness
  complete
matrix presence
  absent
Anatomy of the outer mantle layer apart from the ectormycorrhizal tip
organisation
  pseudoparenchymatous
organisation {if pseudoparenchymatous} cell shape
  epidermoid, puzzle-like, jig-saw-shaped
mantle type
  epidermoid cells bearing a hyphal net (type Q)
hyphal net cells shape
  not specialized
hyphal net cell walls habit
  faint, delicate, inconspicuous, rather thin
hyphal net clamps presence
  absent
clavate end cell cover presence
  absent
hyphae arrangement
  not specific
hyphae sticky matrix on hyphal surface presence
  present
septa thickness {relative to cell walls}
  as thick as walls
septa clamps presence
  absent
cell pigment location-colour
  membranaceously yellowish
cell contents presence-kind
  needle-like [after fixation]
cell diameter
6 µm    Lower value of unspecified range (could be µ-s.d., but not known)
20 µm    Upper value of unspecified range (could be µ+s.d., but not known)
cell length
7 µm    Lower value of unspecified range (could be µ-s.d., but not known)
34 µm    Upper value of unspecified range (could be µ+s.d., but not known)
cell wall thickness
0.3 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
  smooth
drops of exuded pigment presence
  absent
roundish plasmatically yellow cells presence
  absent
pigment granula on surface presence
  absent
Anatomy of the middle mantle layer
presence
  absent
Anatomy of the inner mantle layer
organisation
  plectenchymatous
hyphae arrangement
  without pattern
hyphae vessel-like presence
  absent
septa clamps presence
  absent
cell pigment location-colour
  membranaceously yellowish
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)
Anatomy of the mantle in longitudinal section
mantle thickness {apart from tip}
44 µm    Lower value of unspecified range (could be µ-s.d., but not known)
58 µm    Upper value of unspecified range (could be µ+s.d., but not known)
mantle different layers presence
  discernable
outer mantle layer organisation
  pseudoparenchymatous
outer mantle layer hyphae tangentially length
6.5 µm    Lower value of unspecified range (could be µ-s.d., but not known)
18 µm    Upper value of unspecified range (could be µ+s.d., but not known)
outer mantle layer hyphae radially diameter
3 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)
middle mantle layer presence
  absent
inner mantle layer organisation
  plectenchymatous
inner mantle layer hyphae tangentially length
3 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)
inner mantle layer hyphae radially diameter
1.5 µm    Lower value of unspecified range (could be µ-s.d., but not known)
6.5 µm    Upper value of unspecified range (could be µ+s.d., but not known)

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
  rectangular
anatomy mantle longitudinal section cortical (epidermal) cells tangentially length
13 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 longitudinal section cortical (epidermal) cells radially diameter
9.5 µm    Lower value of unspecified range (could be µ-s.d., but not known)
21 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
structure {in plan view}
  infrequently lobed
lobes width
2.4 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 cross-section



Anatomy of the emanating elements in general
backwards-oriented clamps presence
  absent
Anatomy of cystidia


Anatomy of emanating hyphae
shape
  wavy
or    not striking
cell pigment location-colour
  absent
or    membranaceously yellowish
drops of exuded pigment presence
  absent


Anatomy of the septa of emanating hyphae
clamps presence
  absent


Anatomy of the cells of emanating hyphae
anatomy emanating elements emanating hyphae cell shape {at distal end}
  simple
anatomy emanating elements emanating hyphae cell diameter
1.5 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)
anatomy emanating elements emanating hyphae cell length
4 µm    Lower value of unspecified range (could be µ-s.d., but not known)
18 µm    Upper value of unspecified range (could be µ+s.d., but not known)
anatomy emanating elements emanating hyphae cell wall surface habit
  smooth
anatomy emanating elements emanating hyphae cell wall thickness
0.2 µm    Lower value of unspecified range (could be µ-s.d., but not known)
0.4 µm    Upper value of unspecified range (could be µ+s.d., but not known)


Anatomy of rhizomorphs

Anatomy of hyphae in rhizomorphs
Anatomy of chlamydospores
presence
  absent
Anatomy of haustoria
{of ectomycorrhiza former} presence
  absent
{of foreign origin} presence
  absent

Chemical reactions

reaction with cotton-blue-lactic-acid presence
  present [emanating hyphae and laticifers slightly blue]
reaction with ethanol 70% presence
  present [whole ECM black]
reaction with KOH 10% presence
  absent [whole ECM with KOH 15% ochre-brown]
reaction with lactic acid presence
  present [whole ECM bleaching]
reaction with Melzer's reagent presence
  absent
reaction with NH4OH
  absent
reaction with sulpho-vanillin presence
  present [walls pink, contents of mantle cells with droplets, laticifers black]

Ecology

geographic occurrence continent
  South America

Tree

plant family
  Betulaceae
plant genus
  Alnus

Fungus

family
  Russulaceae
fruitbodies growth habit
  epigeous

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