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- Publisher
- Oxford University Press
- Copyright
- © Published by Oxford University Press.
- ISSN
- 0305-7364
- eISSN
- 1095-8290
- DOI
- 10.1006/anbo.1996.0020
- Publisher site
- See Article on Publisher Site
Abstract
Using data from a well-known, published experiment [Drew (1975)The New Phytologist75: 479–490], the potential exploitation of locally available nutrients by barley roots is calculated. Local proliferation of lateral roots does not necessarily achieve significantly greater exploitation of mobile soil resources like nitrate, but it does for less mobile ones such as phosphate. Despite this, the magnitude of the proliferative response is as great to locally available nitrate as it is to phosphate. This implies an ‘over-production’ of roots in response to localized nitrate availability, prompting a re-evaluation of the nature and implications of the response mechanism(s) of roots to soil heterogeneity.
Journal
Annals of Botany – Oxford University Press
Published: Feb 1, 1996