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Plant and Soil

, Volume 376, Issue 1–2, pp 151–163 | Cite as

Root morphological responses to localized nutrient supply differ among crop species with contrasting root traits

  • Hongbo Li
  • Qinghua Ma
  • Haigang Li
  • Fusuo Zhang
  • Zed Rengel
  • Jianbo ShenEmail author
Regular Article

Abstract

Background and aims

Roots have morphological plasticity to adapt to heterogeneous nutrient distribution in soil, but little is known about crop differences in root plasticity. The objective of this study was to evaluate root morphological strategies of four crop species in response to soil zones enriched with different nutrients.

Methods

Four crop species that are common in intercropping systems [maize (Zea mays L.), wheat (Triticum aestivum L.), faba bean (Vicia faba L.), and chickpea (Cicer arietinum L.)] and have contrasting root morphological traits were grown for 45 days under uniform or localized nitrogen and phosphorus supply.

Results

For each species tested, the nutrient supply patterns had no effect on shoot biomass and specific root length. However, localized supply of ammonium plus phosphorus induced maize and wheat root proliferation in the nutrient-rich zone. Localized supply of ammonium alone suppressed the whole root growth of chickpea and maize, whereas localized phosphorus plus ammonium reversed (maize and chickpea ) the negative effect of ammonium. The localized root proliferation of chickpea in a nutrient-rich zone did not increase the whole root length and root surface area. Faba bean had no significant response to localized nutrient supply.

Conclusions

The root morphological plasticity is influenced by nutrient-specific and species-specific responses, with the greater plasticity in graminaceous (eg. maize) than leguminous species (eg. faba bean and chickpea).

Keywords

Crop species Nutrient patches Nutrient-specific responses Root/shoot partitioning Root morphological plasticity 

Notes

Acknowledgments

This study was supported by the National Natural Science Foundation of China (NSFC) (Nos. 31330070, 30925024 and 31210103906), the Innovative Group Grant of the NSFC (No. 31121062), and the Program of Introducing International Advanced Agricultural Science and Technology of the Ministry of Agriculture of China (948 Program) (No. 2011-G18).

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Copyright information

© Springer Science+Business Media Dordrecht 2013

Authors and Affiliations

  • Hongbo Li
    • 1
  • Qinghua Ma
    • 1
  • Haigang Li
    • 1
  • Fusuo Zhang
    • 1
  • Zed Rengel
    • 2
  • Jianbo Shen
    • 1
    Email author
  1. 1.Centre for Resources, Environmental and Food Security, Department of Plant Nutrition, Key Laboratory of Plant-Soil Interactions, Ministry of EducationChina Agricultural UniversityBeijingPeople’s Republic of China
  2. 2.Soil Science & Plant Nutrition, School of Earth and Environment, The UWA Institute of AgricultureThe University of Western AustraliaCrawleyAustralia

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