Increased soil phosphorus availability induced by faba bean root exudation stimulates root growth and phosphorus uptake in neighbouring maize

D. Zhang, C. Zhang, X. Tang, H. Li, F. Zhang, Zed Rengel, W.R. Whalley, W.J. Davies, J. Shen

Research output: Contribution to journalArticle

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Abstract

© 2015 New Phytologist Trust. Root growth is influenced by soil nutrients and neighbouring plants, but how these two drivers affect root interactions and regulate plant growth dynamics is poorly understood. Here, interactions between the roots of maize (Zea mays) and faba bean (Vicia faba) are characterized. Maize was grown alone (maize) or with maize (maize/maize) or faba bean (maize/faba bean) as competitors under five levels of phosphorus (P) supply, and with homogeneous or heterogeneous P distribution. Maize had longer root length and greater shoot biomass and P content when grown with faba bean than with maize. At each P supply rate, faba bean had a smaller root system than maize but greater exudation of citrate and acid phosphatase, suggesting a greater capacity to mobilize P in the rhizosphere. Heterogeneous P availability enhanced the root-length density of maize but not faba bean. Maize root proliferation in the P-rich patches was associated with increased shoot P uptake. Increased P availability by localized P application or by the presence of faba bean exudation stimulated root morphological plasticity and increased shoot growth in maize in the maize/faba bean mixture, suggesting that root interactions of neighbouring plants can be modified by increased P availability.
LanguageEnglish
Pages823-831
JournalNew Phytologist
Volume209
Issue number2
Early online date27 Aug 2015
DOIs
StatePublished - Jan 2016

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Vicia faba
exudation
faba beans
Phosphorus
Zea mays
root growth
Soil
uptake mechanisms
phosphorus
corn
Growth
soil
shoots
Rhizosphere
acid phosphatase
citrates
Acid Phosphatase
soil nutrients
Citric Acid
root systems

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Zhang, D. ; Zhang, C. ; Tang, X. ; Li, H. ; Zhang, F. ; Rengel, Zed ; Whalley, W.R. ; Davies, W.J. ; Shen, J./ Increased soil phosphorus availability induced by faba bean root exudation stimulates root growth and phosphorus uptake in neighbouring maize. In: New Phytologist. 2016 ; Vol. 209, No. 2. pp. 823-831
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Zhang, D, Zhang, C, Tang, X, Li, H, Zhang, F, Rengel, Z, Whalley, WR, Davies, WJ & Shen, J 2016, 'Increased soil phosphorus availability induced by faba bean root exudation stimulates root growth and phosphorus uptake in neighbouring maize' New Phytologist, vol 209, no. 2, pp. 823-831. DOI: 10.1111/nph.13613

Increased soil phosphorus availability induced by faba bean root exudation stimulates root growth and phosphorus uptake in neighbouring maize. / Zhang, D.; Zhang, C.; Tang, X.; Li, H.; Zhang, F.; Rengel, Zed; Whalley, W.R.; Davies, W.J.; Shen, J.

In: New Phytologist, Vol. 209, No. 2, 01.2016, p. 823-831.

Research output: Contribution to journalArticle

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