Octavianina densa (Rodway) G. H. Cunn. + Eucalyptus

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Literature

• references
  Chilvers GA (1968) Some distinctive types of eucalypt mycorrhiza. Aust J Bot 16: 49-70.

Morphology

Morphology of the mycorrhizal system
• ramification presence-type
  monopodial-pyramidal
• 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)
• rhizomorphs as stout, short, conical structures presence-abundance
  absent
• rhizomorphs presence
  present
• rhizomorphs frequency
  abundant
Morphology of the unramified ends
• shape
  straight
or    bent
• shape {of distal end}
  not inflated, cylindric
• colour
  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 surface {in general} habit
  smooth
• 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)
0.2 mm    Upper value of unspecified range (could be µ+s.d., but not known)
• cross-section shape
  round or roundish
• colour
  yellowish
or    white
• ramification kind-frequency
  frequently, at restricted points
• origin location
  proximal
• margin habit
  hairy
• dimorphism presence
  absent
Morphology of sclerotia
• presence
  absent

Anatomy

Anatomical features of the entire mycorrhiza
• emanating elements presence-type
  cystidia
• emanating elements cystidia location
  on outer mantle layer
or    on 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
  hyphae rather irregularly arranged and no special pattern discernible (type B)
• cell wall surface habit
  smooth
Anatomy of the middle mantle layer
• organisation
  plectenchymatous
• cell wall surface habit
  smooth
Anatomy of the inner mantle layer
• organisation
  plectenchymatous
Anatomy of the mantle in longitudinal section
• mantle thickness {apart from tip}
17 µm    Lower value of unspecified range (could be µ-s.d., but not known)
25 µm    Upper value of unspecified range (could be µ+s.d., but not known)
• mantle different layers presence
  not discernable
• outer mantle layer organisation
  plectenchymatous
• middle mantle layer organisation
  plectenchymatous
• inner mantle layer organisation
  plectenchymatous
• unlayered mantle hyphae radially diameter
2 µm    Minimum value
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)
5 µm    Maximum value


Anatomy of the cortical cells in longitudinal section
• anatomy mantle longitudinal section cortical (epidermal) cells shape
  radially-oval to -elliptic, oriented obliquely

Anatomy of the Hartig net in longitudinal section
• presence
  present
• kind
  paraepidermal
• anatomy mantle longitudinal section hyphal cells around cortical (epidermal) cells shape
  roundish
• anatomy mantle longitudinal section hyphal cells around cortical cells (epidermal) thickness
1.5 µm    Lower value of unspecified range (could be µ-s.d., but not known)
2.5 µm    Upper value of unspecified range (could be µ+s.d., but not known)
• anatomy mantle longitudinal section hyphal rows around cortical (epidermal) cells number
  one
Anatomy of the mantle in cross-section
• mantle different layers presence
  not discernible
• outer mantle layer organisation
  plectenchymatous
• middle mantle layer organisation
  plectenchymatous
• inner mantle layer organisation
  plectenchymatous
• unlayered mantle hyphae radially diameter
2 µm    Minimum value
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)
5 µm    Maximum value


Anatomy of the cortical cells in cross-section
• anatomy mantle cross-section cortical (epidermal) cells shape
  radially-oval to -elliptic

Anatomy of the Hartig net in cross-section
• presence
  present
• kind
  apparently two rows deep
• anatomy mantle cross-section hyphal cells around cortical (epidermal) cells shape
  roundish
• anatomy mantle cross-section hyphal cells around cortical (epidermal) cells thickness
1.5 µm    Lower value of unspecified range (could be µ-s.d., but not known)
2.5 µm    Upper value of unspecified range (could be µ+s.d., but not known)
• anatomy mantle cross-section hyphal rows around cortical (epidermal) cells number
  one
Anatomy of the emanating elements in general
Anatomy of cystidia

Anatomy of cystidia (type 1)
• type
  awl-shaped, bristle-like (type A)
• ramification presence-position
  medial
• branches ramification presence
  absent
• diameter {proximal}
2 µm    Lower value of unspecified range (could be µ-s.d., but not known)
2.5 µm    Upper value of unspecified range (could be µ+s.d., but not known)
• diameter {distal}
1.5 µm    Mean (= average)
• length
60 µm    Lower value of unspecified range (could be µ-s.d., but not known)
80 µm    Upper value of unspecified range (could be µ+s.d., but not known)
• cell wall thickness
0.5 µm    Minimum value
1 µm    Mean (= average)
1.2 µm    Maximum value
• cell wall thickness {relative to mantle cells}
  thicker
• surface habit
  smooth

Anatomy of emanating hyphae






Anatomy of rhizomorphs
• cup-like structures on surface presence
  absent

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

Ecology

• geographic occurrence continent
  Australia
• knowledge about association with foreign fruitbodies presence
  unknown

Tree

• plant family
  Myrtaceae
• plant genus
  Eucalyptus
• plant habitat kind
  forests, woods

Fungus

• fruitbodies growth habit
  hypogeous
or    gastroid

Remarks

• public notes
  Mycorrhizal ends opaque white; rhizomorphs in older stages lightly pigmented yellow in patches, with a central core of thick hyphae.

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