Exploring root developmental plasticity to nitrogen with a three-dimensional architectural model

Background and aimsRoot plasticity is a key process affecting the root system foraging capacity while itself being affected by the nutrient availability around the root environment. Root system architecture is determined by three types of plastic responses: chemotropism, spacing of lateral roots, hierarchy between laterals and their mother root.MethodsWe attempt a systematic comparison of the effect of each mechanism on the whole root plasticity when the root is grown under four distinct nutrient distribution scenarios using a functional-structural root model. Nutrient distributions included i) a completely random distribution, ii) a layered distribution, iii) a patch distribution, and iv) a gradient distribution. Root length, volume, total uptake, uptake efficiency as well as the soil profiles are given as model outputs.ResultsRoot uptake was more efficient in a soil with a gradient nutrient distribution and less so in a patch distribution for all mechanisms. In terms of mechanisms uptake was more efficient for the spacing (elongation) mechanism than the hierarchy (branching) mechanism.ConclusionsRoot mechanisms play a different role in the foraging of the root with chemotropism being a global tracking mechanism, whereas spacing and hierarchy are ways to proliferate in a zone with locally available nutrients.

[1]  Christophe Godin,et al.  Functional-structural plant modelling. , 2005, The New phytologist.

[2]  D. Robinson,et al.  Root proliferation, nitrate inflow and their carbon costs during nitrogen capture by competing plants in patchy soil , 2001, Plant and Soil.

[3]  B. Forde,et al.  The nutritional control of root development , 2001 .

[4]  J. P. Grime,et al.  A trade-off between scale and precision in resource foraging , 1991, Oecologia.

[5]  Johannes A. Postma,et al.  Modelling root plasticity and response of narrow-leafed lupin to heterogeneous phosphorus supply , 2013, Plant and Soil.

[6]  M. Hutchings,et al.  Root system size and precision in nutrient foraging: responses to spatial pattern of nutrient supply in six herbaceous species , 2001 .

[7]  H. Kroon,et al.  Foraging in Plants: the Role of Morphological Plasticity in Resource Acquisition , 1994 .

[8]  Xiaolong Yan,et al.  3D reconstruction and dynamic modeling of root architecture in situ and its application to crop phosphorus research. , 2009, The Plant journal : for cell and molecular biology.

[9]  M. Hutchings,et al.  The effects of spatial scale of environmental heterogeneity on the growth of a clonal plant: an experimental study with Glechoma hederacea , 1997 .

[10]  G. Buck-Sorlin,et al.  How plant architecture affects light absorption and photosynthesis in tomato: towards an ideotype for plant architecture using a functional-structural plant model. , 2011, Annals of botany.

[11]  M. Biondini,et al.  Growth rate, root development and nutrient uptake of 55 plant species from the Great Plains Grasslands, USA , 2003, Plant Ecology.

[12]  G. Berntson.  Modelling root architecture: are there tradeoffs between efficiency and potential of resource acquisition? , 1994 .

[13]  A. Robson,et al.  The distribution of Mg, P and K in the split roots of subterranean clover , 1991 .

[14]  Gail W. T. Wilson,et al.  Architectural analysis of plant root systems 1. Architectural correlates of exploitation efficiency , 1991 .

[15]  Paul C. Struik,et al.  Functional-Structural Plant Modelling in Crop Production , 2007 .

[16]  E. Epstein.  Mineral Nutrition of Plants: Principles and Perspectives , 1972 .

[17]  Przemyslaw Prusinkiewicz,et al.  The Algorithmic Beauty of Plants , 1990, The Virtual Laboratory.

[18]  O. P. Toky,et al.  Observations on the rooting patterns of some agroforestry trees in an arid region of north-western India , 1992, Agroforestry Systems.

[19]  Angela Hodge,et al.  The plastic plant: root responses to heterogeneous supplies of nutrients , 2004 .

[20]  Andrei G. Jablokow,et al.  Carbon cost of root systems: an architectural approach , 1994 .

[21]  Daniel Leitner,et al.  A dynamic root system growth model based on L-Systems , 2010, Plant and Soil.

[22]  J. Malamy,et al.  Intrinsic and environmental response pathways that regulate root system architecture. , 2005, Plant, cell & environment.

[23]  D. A. Rose.  The description of the growth of root systems , 1983, Plant and Soil.

[24]  Ole Kniemeyer.  Design and implementation of a graph grammar based language for functional-structural plant modelling , 2008 .

[25]  J. Lynch,et al.  Topsoil foraging – an architectural adaptation of plants to low phosphorus availability , 2001, Plant and Soil.

[26]  Andrei G. Jablokow,et al.  Carbon cost of root systems: an architectural approach , 1994, Plant and Soil.

[27]  J. P. Grime,et al.  A comparative study of plant responsiveness to the duration of episodes of mineral nutrient enrichment , 1989 .

[28]  Alastair Fitter,et al.  Why plants bother: root proliferation results in increased nitrogen capture from an organic patch when two grasses compete , 1999 .

[29]  A. Fitter.  11 – Architecture and Biomass Allocation as Components of the Plastic Response of Root Systems to Soil Heterogeneity , 1994 .

[30]  B. Forde,et al.  Regulation of Arabidopsis root development by nitrate availability. , 2000, Journal of experimental botany.

[31]  Peter W. Barlow,et al.  The Root Cap: Cell Dynamics, Cell Differentiation and Cap Function , 2002, Journal of Plant Growth Regulation.

[32]  Robert B. Jackson,et al.  PLANT COMPETITION UNDERGROUND , 1997 .

[33]  Joel s. Brown,et al.  Intra-plant versus Inter-plant Root Competition in Beans: avoidance, resource matching or tragedy of the commons , 2002, Plant Ecology.

[34]  M. Caldwell,et al.  The effects of shading and N status on root proliferation in nutrient patches by the perennial grass Agropyron desertorum in the field , 1995, Oecologia.

[35]  QiongLi Wu,et al.  Sensitivity Analysis for Functional Structural Plant Modelling , 2012 .

[36]  H. de Kroon,et al.  A modular concept of plant foraging behaviour: the interplay between local responses and systemic control. , 2009, Plant, Cell and Environment.

[37]  Robert D. Davis,et al.  SimRoot: Modelling and visualization of root systems , 2004, Plant and Soil.

[38]  Robert H. Jones,et al.  Nutrient foraging traits in 10 co‐occurring plant species of contrasting life forms , 1999 .

[39]  C. Raper,et al.  Proliferation of maize (Zea mays L.) roots in response to localized supply of nitrate. , 1989, Journal of experimental botany.

[40]  Alastair H. Fitter,et al.  Architectural analysis of plant root systems , 1992 .

[41]  Alastair H. Fitter,et al.  AN ARCHITECTURAL APPROACH TO THE COMPARATIVE ECOLOGY OF PLANT ROOT SYSTEMS , 2008 .

[42]  L. Pagès,et al.  Growth patterns of the lateral roots of young oak (Quercus robur) tree seedlings Relationship with apical diameter. , 1995, The New phytologist.

[43]  Alastair H. Fitter,et al.  Root system architecture in relation to life history and nutrient supply , 1988 .

[44]  Jochem B. Evers,et al.  Functional-Structural Plant Modelling in Crop Production: Adding a dimension , 2007 .

[45]  Gerhard Buck-Sorlin,et al.  Functional-Structural Plant Models , 2008 .

[46]  Loïc Pagès,et al.  Links between root developmental traits and foraging performance. , 2011, Plant, cell & environment.

[47]  P. Ryser,et al.  Phosphorus allocation and utilization in three grass species with contrasting response to N and P supply. , 1997, The New phytologist.

[48]  Suqin Fang,et al.  3D Quantification of Plant Root Architecture In Situ , 2012 .

[49]  S. Gilroy,et al.  The exploring root--root growth responses to local environmental conditions. , 2009, Current opinion in plant biology.

[50]  B. Forde,et al.  The nutritional control of root development , 2001, Plant and Soil.

[51]  Growth and shoot: Root ratio of seedlings in relation to nutrient availability , 1995 .

[52]  Takahisa Mizuyama,et al.  Root-system development and water-extraction model considering hydrotropism , 2003 .

[53]  D. Robinson.  The responses of plants to non-uniform supplies of nutrients. , 1994, The New phytologist.

[54]  J. Malamy,et al.  Root System Architecture , 2010 .

[55]  I. Bingham,et al.  Site, Scale and Time-course for Adjustments in Lateral Root Initiation in Wheat Following Changes in C and N Supply , 1997 .

[56]  A. Diggle,et al.  Simulating form and function of root systems: efficiency of nitrate uptake is dependent on root system architecture and the spatial and temporal variability of nitrate supply , 2004 .

[57]  T. Ericsson.  Growth and shoot: root ratio of seedlings in relation to nutrient availability , 2004, Plant and Soil.