Abstract
Colonization by and diversity of arbuscular mycorrhizal (AM) fungi associated with five common ephemerals, Eremopyrum orientale (L.) Jaub. et Spach., Gagea sacculifera Regel., Plantago minuta Pall., Tragopogon kasahstanicus S. Nikit., and Trigonella arcuata C. A. Mey. were investigated in four typical desert plant communities in Junggar Basin, northwest China. All five ephemerals examined were found to be colonized and formed typical arbuscules or vesicles. The proportion of root length colonized ranged from 2 to 85% with an average of 19%. Spore density in soil near the roots of different ephemerals varied from I to 120 spores per 20 ml soil, with an average value of 33 spores. Species richness averaged 8.8 AM fungal species in soil near the roots and ranged from 2 to 21. Fifty-four AM fungal taxa belonging to the genera Acaulospora, Archaeospora, Entrophospora, Glomus and Paraglomus were isolated and identified from soil around the roots. Glomus was the dominant AM fungal genus with a frequency of 100% and relative abundance of 82.6%. The AM fungal species with the highest frequency of occurrence was Glomus aggregatum with a frequency of 75%. G. microaggregatum was present in the highest relative abundance (16%). G. sacculifera, P. minuta and T arcuata formed Arum-type mycorrhizas. Arbuscular mycorrhizal fungi are ubiquitous and Arum-type mycorrhizas are especially prevalent in these important desert communities used for grazing and traditional medicine. (c) 2006 Elsevier B.V. All rights reserved.
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Claims 11
Claim · model-written summary
All five ephemerals had mycorrhizal colonization with arbuscules or vesicles.
Verbatim
e0“All five ephemerals examined were found to be colonized and formed typical arbuscules or vesicles.”
Claim · model-written summary
Root colonization ranged from 2 to 85%, averaging 19%.
Not reportedTaxon
Verbatim
e0“The proportion of root length colonized ranged from 2 to 85% with an average of 19%.”
Claim · model-written summary
Spore density near ephemeral roots ranged from I to 120 per 20 ml soil, averaging 33.
Verbatim
e0“Spore density in soil near the roots of different ephemerals varied from I to 120 spores per 20 ml soil, with an average value of 33 spores.”
Claim · model-written summary
AM fungal richness near roots averaged 8.8 species and ranged from 2 to 21.
Not reportedTaxon
Verbatim
e0“Species richness averaged 8.8 AM fungal species in soil near the roots and ranged from 2 to 21.”
Claim · model-written summary
Fifty-four AM fungal taxa in five genera were identified around roots.
Verbatim
e0“Fifty-four AM fungal taxa belonging to the genera Acaulospora, Archaeospora, Entrophospora, Glomus and Paraglomus were isolated and identified from soil around the roots.”
Claim · model-written summary
Glomus was dominant at 100% frequency and 82.6% relative abundance.
GlomusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Glomus was the dominant AM fungal genus with a frequency of 100% and relative abundance of 82.6%.”
Claim · model-written summary
Glomus aggregatum had the highest occurrence frequency, 75%.
- Taxon
- Glomus aggregatumRhizophagus aggregatuse0
- Outcome
- highest frequency of occurrencee0
- Value
- 75%e0
Verbatim
e0“The AM fungal species with the highest frequency of occurrence was Glomus aggregatum with a frequency of 75%.”
Claim · model-written summary
G. microaggregatum had the highest relative abundance, 16%.
- Taxon
- G. microaggregatumGlomus microaggregatume0
- Outcome
- highest relative abundancee0
- Value
- 16%e0
Verbatim
e0“G. microaggregatum was present in the highest relative abundance (16%).”
Claim · model-written summary
G. sacculifera formed Arum-type mycorrhizas.
Verbatim
e0“G. sacculifera, P. minuta and T arcuata formed Arum-type mycorrhizas.”
Claim · model-written summary
P. minuta formed Arum-type mycorrhizas.
- Taxon
- P. minutaPlantago minutae0
- Outcome
- formed Arum-type mycorrhizase0
Verbatim
e0“G. sacculifera, P. minuta and T arcuata formed Arum-type mycorrhizas.”
Claim · model-written summary
T arcuata formed Arum-type mycorrhizas.
- Taxon
- T arcuataMedicago medicaginoidese0
- Outcome
- formed Arum-type mycorrhizase0
Verbatim
e0“G. sacculifera, P. minuta and T arcuata formed Arum-type mycorrhizas.”