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The plastic plant: root responses to heterogeneous supplies of nutrients
- A. Hodge
- 1 April 2004
The environmental context in which the root response is expressed is as important as the magnitude of the response itself when it comes to demonstrating that root proliferation is beneficial to the plant. Expand
Plant and mycorrhizal regulation of rhizodeposition.
Evidence is brought together to show that roots can directly regulate most aspects of rhizosphere C flow either by regulating the exudation process itself or by directly regulating the recapture of exudates from soil. Expand
An arbuscular mycorrhizal fungus accelerates decomposition and acquires nitrogen directly from organic material
It is shown that the arbuscular mycorrhizal symbiosis can both enhance decomposition of and increase nitrogen capture from complex organic material (grass leaves) in soil. Expand
Arbuscular mycorrhizal fungi and organic farming
The evidence available suggests that this leads to increased AMF inoculum in soils, greater crop colonisation and enhanced nutrient uptake, though there is little evidence for increased yield resulting from high rates of AMF colonisation in organic systems. Expand
Dissolved organic nitrogen uptake by plants—an important N uptake pathway?
Abstract The direct uptake of dissolved organic nitrogen (DON) by plants has the potential to be a primary Factor in ecosystem functioning and vegetation succession particularly in N-limiting… Expand
Are microorganisms more effective than plants at competing for nitrogen?
It is argued that the key determinants of 'success' in nitrogen competition are spatial differences in nitrogen availability and in root and microbial distributions, together with temporal differences in microbial and root turnover. Expand
Substantial nitrogen acquisition by arbuscular mycorrhizal fungi from organic material has implications for N cycling
Findings show that AM fungi can obtain substantial amounts of N from decomposing organic materials and can enhance their fitness as a result, which means that they represent a global N pool equivalent in magnitude to fine roots and play a substantial and hitherto overlooked role in the nitrogen cycle. Expand
Plant root growth, architecture and function
Some key biotic and abiotic constraints on root development and function in the soil environment are examined and some of the adaptations roots have evolved to counter such stresses discussed. Expand
Plant root proliferation in nitrogen–rich patches confers competitive advantage
- D. Robinson, A. Hodge, B. Griffiths, A. Fitter
- Proceedings of the Royal Society of London…
- 7 March 1999
It is shown that N capture is associated strongly with proliferation during interspecific competition for finite, locally available, mixed N sources, precisely the conditions under which N becomes available to plants on generally infertile soils. Expand
Arbuscular mycorrhizal fungi can transfer substantial amounts of nitrogen to their host plant from organic material.
It is indicated that uptake from organic N could be important in AM symbiosis for both plant and fungal partners and that some AM fungi may acquire inorganic N from organic sources. Expand