Atriplex corrugate

  • Genus

    Atriplex

  • Family
    Amaranthaceae
  • Synonyms

    Atriplex nuttallii var. corrugate

    Obione corrugata

  • Common names

    Mat saltbush

    Mat atriplex

    Matscale

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Purity

  • ISTA PSD

    2

    See Details
  • AOSA PSU

    38

    See Details
  • Purity working weight (grams)

    25

    See Details
  • Other species (OSD)/Noxious working weight (grams)

    250

    See Details

PSU 38

Intact utricle with or without perianth, enclosed or not enclosed by fruiting bracts (bracteoles), whether or not a seed is present. Piece of broken utricle larger than one-half the original size, unless no seed is present. Seed with or without seed coat. Piece of broken seed, with or without seed coat, larger than one-half the original size.

Special consideration:

  • For Bassia prostrata, seed units that are retained on a 1mm opening square-hole sieve, when shaken for 30 seconds shall be considered pure seed units. Seed units that pass through the 1-mm sieve shall be classified as inert matter.
  • For Grayia spinosa, intact seed units provided a true seed with some degree of embryo development can be detected by slight pressure and by examination over light.

TWS Notes

PSD 2

Achene or cluster, with or without perianth or pedicel, unless it is obvious that no seed is present.

Piece of achene or cluster larger than one-half the original size, unless it is obvious that no seed is present.

Seed, with the pericarp/testa partially or entirely removed.

Piece of seed larger than one-half the original size, with the pericarp/testa partially or entirely removed.

Gomphrena: Achene with or without hairy perianth, unless it is obvious that no seed is present.

TWS Notes

Purity working weight (grams)

Noxious working weight/OSD

Germination and dormancy breaking method

Media

 Agar 1%, Between blotter or paper

Moistened with

 H2O

Prechill

 No

Other dormancy breaking recommendations

Check for dormancy of firm ungerminated seeds at the termination of the test, using the basic criteria indicated in the Tetrazolium section below.

Germination Temperature

 15°C

Hours light/dark

 8/16

Days in warm germ

 21

Germination Image Gallery

Description of Normal/Abnormal Seedlings:

Seedling conditions present (singly or in combination), which would cause the seedling to be evaluated as abnormal (not considered viable):

Cotyledons: Abnormal if less than half of normally developed cotyledon with healthy tissue remains attached.

Epicotyl: missing, however may be considered present if cotyledons are intact.

Hypocotyl: open lesions extending into conducting tissue. Shortened curled or thickened.

Root: None, weak stubby or missing primary root even with weak secondary roots.

Seedling: Albino seedling is abnormal. Primary infection in one or more essential structures. Consider infection to be secondary if seedling is well developed and normally balanced (Normal).

Modified Germination:

Test can be terminated at 14 days if the dormancy is checked with tetrazolium at the termination of the germination test.

Tetrazolium (TZ) Methodology Recommendations:

  • Imbibition method and time

    Imbibe overnight between moist media or immersed in water

  • Option(s) to prepare and cut seed for staining

    Cross-section seed across embryo

  • Percentage (%) of TZ solution

    1.0

  • Time and temp of staining (hr)

    Usually 2-4 hours in oven between 30-35°C

  • List of important seed structures requiring staining:
    The embryo that stain completely red are viable. Green embryos are not considered viable. Empty utricles are not viable.

TZ Methodology Gallery