Riessiella clavata Jülich + Shorea

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Literature

• references
  Jülich W (1985) Fungi associated with Dipterocarpaceae in southeast Asia. 1. The genera Riessia and Riessiella. Int J Mycol Lichenol 2(1): 123-140.
Lee LS, Alexander IJ, Watling R (1997) Ectomycorrhizas and putative ectomycorrhizal fungi of Shorea leprosula Miq. (Dipterocarpaceae). Mycorrhiza 7(2): 63-81.

Morphology

Morphology of the mycorrhizal system
• ramification presence-type
  monopodial-pinnate
Morphology of the unramified ends
• colour
  black
or    dark brown
• mantle surface {in general} habit
  not smooth
• mantle surface {in detail} kind
  loosely short-spiny
or    densely long-spiny
Morphology of rhizomorphs
• colour
  black
or    dark brown

Anatomy

Anatomical features of the entire mycorrhiza
• emanating elements presence-type
  rhizomorphs
or    cystidia
• emanating elements cystidia location
  on outer mantle layer
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 arranged net-like, with prominent cystidia (type D)
• hyphal system kind
  undifferentiated
• cell pigment location-colour
  membranaceously brownish
• cell diameter
4 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)
• cell wall thickness
0.2 µm    Lower value of unspecified range (could be µ-s.d., but not known)
0.8 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
  plectenchymatous
Anatomy of the inner mantle layer
• organisation
  plectenchymatous
• hyphae arrangement
  with broad streaks of parallel hyphae
• cell pigment location-colour
  membranaceously yellowish
Anatomy of the mantle in longitudinal section
• mantle thickness {apart from tip}
15 µm    Lower value of unspecified range (could be µ-s.d., but not known)
30 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
Anatomy of cystidia

Anatomy of cystidia (type 1)
• type
  bristle-like with an apical knob, gloeocystidia (type H)
or    capitate (type N)
• septa presence
  present
• septa kind
  with intercalary clamps
• diameter {proximal}
4 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)
• diameter {distal}
8 µm    Lower value of unspecified range (could be µ-s.d., but not known)
14 µm    Upper value of unspecified range (could be µ+s.d., but not known)
• length
50 µm    Lower value of unspecified range (could be µ-s.d., but not known)
120 µm    Upper value of unspecified range (could be µ+s.d., but not known)
• cell wall colour
  brownish
• cell wall evenness
  even in thickness
• surface habit
  smooth

Anatomy of emanating hyphae






Anatomy of rhizomorphs
• type
  undifferentiated; hyphae rather loosely woven and of uniform diameter
(type A)
or    undifferentiated; margins rather smooth; hyphae compactly arranged and of uniform diameter
(type B)

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

Ecology

• geographic occurrence continent
  Asia

Tree

• plant family
  Dipterocarpaceae
• plant genus
  Shorea
• plant habitat kind
  forests, woods

Remarks

• public notes
  Mycorrizal ends dark brown to black; rhizomorphs dark brown to black; cystidia with a terminal yellowish to subhyaline, broadly clavate, smooth cell; emanating hyphae with clamps; rhizomorphs are described as undifferentiated with clamps (Lee et al. 1997); Hartig net lacking.

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