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

Zhang, Deshan and Zhang, Chaochun and Tang, Xiaoyan and Li, Haigang and Zhang, Fusuo and Rengel, Zed and Whalley, William Richard and Davies, William John and Shen, Jianbo (2016) Increased soil phosphorus availability induced by faba bean root exudation stimulates root growth and phosphorus uptake in neighbouring maize. New Phytologist, 209 (2). pp. 823-831. ISSN 0028-646X

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Abstract

Summary 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.

Item Type:
Journal Article
Journal or Publication Title:
New Phytologist
Additional Information:
This is the peer reviewed version of the following article: Zhang, D., Zhang, C., Tang, X., Li, H., Zhang, F., Rengel, Z., Whalley, W. R., Davies, W. J. and Shen, J. (2016), Increased soil phosphorus availability induced by faba bean root exudation stimulates root growth and phosphorus uptake in neighbouring maize. New Phytol, 209: 823–831. doi:10.1111/nph.13613 which has been published in final form at http://onlinelibrary.wiley.com/doi/10.1111/nph.13613/abstract This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2700
Subjects:
ID Code:
79170
Deposited By:
Deposited On:
22 Apr 2016 12:42
Refereed?:
Yes
Published?:
Published
Last Modified:
07 Apr 2020 03:50