Claim · model-written summary
In highly compacted soil, none of the four VAM fungi produced an observable mycorrhizal growth response; authors attributed this to oxygen decline, pore changes and possible ethylene production.
Trifolium subterraneumVerbatim
e0“The absence of any observable mycorrhizal growth response to any of the four species of VAM fungi in highly compacted soil (bulk density = 1·75 Mg m −3 ) was attributed to the significant decrease in the O 2 content of the soil atmosphere, change in soil pore size distribution and, presumably, to ethylene production.”
t0“Trifolium subterraneum”
Title
H. NADIAN; S. E. SMITH; A. M. ALSTON; et al. New Phytologist 1998. doi:10.1046/j.1469-8137.1998.00219.x
Other claims from this paper (10)
- Association Increasing soil compaction reduced clover shoot and root dry matter.
- Intervention effect Glomus intraradices colonization increased clover growth and P uptake up to 1·60 Mg m −3, with a smaller response as compaction rose.
- Intervention effect Glomus sp. City Beach WUM16 colonization increased clover growth and P uptake up to 1·60 Mg m −3, with a smaller response as compaction rose.
- Intervention effect Glomus etunicatum had no effect on shoot dry weight and P uptake at soil bulk density 1·40 Mg m −3.
- Intervention effect Glomus mosseae had no effect on shoot dry weight and P uptake at soil bulk density 1·60 Mg m −3.
- Intervention effect Compaction to 1·60 Mg m −3 did not change the percentage of root length colonized by G. intraradices.
- Intervention effect Compaction to 1·60 Mg m −3 did not change the percentage of root length colonized by Glomus sp. City Beach.
- Association Total colonized root length decreased with increasing soil compaction.
- Mechanism The authors attributed reduced P uptake and growth of clover colonized by two fungi under compaction mainly to less colonized root length and hyphal biomass.
- Observation Compaction from 1·20 to 1·75 Mg m −3 reduced soil-atmosphere O 2 content from 0·16 to 0·05 m 3 m −3.
Zea mays
Helianthus annuus