A plant root system architectural taxonomy: A framework for root nomenclature

Abstract Research into root system morphology over the last two centuries has developed a diverse set of terminologies that are difficult to apply consistently across species and research specialties. In response to a need for better communication, a workshop held by the International Society for Root Research established some nomenclature standards for root research. These standards and their justification are presented in this study. A framework for a root system architectural taxonomy is created by defining four main classes of root: the tap root, that is, the first root to emerge from the seed; lateral roots, which are branches of other roots; shoot‐borne roots, which arise from shoot tissues; and basal roots, which develop from the hypocotyl, that is, the organ which is between the base of the shoot and the base of the tap root. It is concluded that adherence to the presented taxonomy will reduce confusion and eliminate some of the current confounding of results.

[1]  S. Ruppel,et al.  Differences between bacterial associations with two root types of Vicia faba L , 2007 .

[2]  Dr. Wolfgang Böhm.  Methods of Studying Root Systems , 1979, Ecological Studies.

[3]  A. Eshel,et al.  Plant roots : the hidden half , 1991 .

[4]  K. Ljung,et al.  Auxin and Light Control of Adventitious Rooting in Arabidopsis Require ARGONAUTE1w⃞ , 2005, The Plant Cell Online.

[5]  Jonathan P. Lynch,et al.  Roots of the Second Green Revolution , 2007 .

[6]  R. Zobel.  Root growth and development , 1991 .

[7]  Alastair H. Fitter,et al.  Characteristics and Functions of Root Systems , 2002 .

[8]  D. Inzé,et al.  Superroot, a recessive mutation in Arabidopsis, confers auxin overproduction. , 1995, The Plant cell.

[9]  R. Russell.  Plant Root Systems , 1982 .

[10]  Anthony Trewavas,et al.  Response to Alpi et al.: Plant neurobiology--all metaphors have value. , 2007, Trends in plant science.

[11]  T. Nicolson,et al.  The Rhizosphere and Plant Growth , 2012, Beltsville Symposia in Agricultural Research.

[12]  A. ALLSOPP,et al.  Plant Anatomy , 1966, Nature.

[13]  Frank Hochholdinger,et al.  Isolation and characterization of rtcs, a maize mutant deficient in the formation of nodal roots , 1996 .

[14]  M. van Noordwijk,et al.  Root methods: A handbook , 2000 .

[15]  A. Eshel,et al.  Functional Diversity of Various Constituents of a Single Root System , 2002 .

[16]  R. Zobel,et al.  Maize and Soybean Tap, Basal, and Lateral Root Responses to a Stratified Acid, Aluminum‐Toxic Soil , 1998 .

[17]  J. Blake.  Bio-ontologies—fast and furious , 2004, Nature Biotechnology.

[18]  Wei Zhao,et al.  Gramene: a resource for comparative grass genomics , 2002, Nucleic Acids Res..

[19]  R. Zobel,et al.  Differential Genotypic and Root Type Penetration of Compacted Soil Layers , 1998 .

[20]  M. Sauer,et al.  Genetic dissection of root formation in maize (Zea mays) reveals root-type specific developmental programmes. , 2004, Annals of botany.

[21]  D. Clarkson,et al.  The development and function of roots. , 1977 .

[22]  A. Eshel,et al.  Aeroponics: A Tool for Root Research Under Minimal Environmental Restrictions , 2002 .

[23]  Peter J. Gregory,et al.  Plant roots : growth, activity and interaction with soils , 2006 .

[24]  Nick Campbell,et al.  Maize genetics and genomics database , 2003, Nature Reviews Genetics.