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Consequences of root growth kinetics and vascular structure on the distribution of lateral roots

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Draye, Xavier [UCL]

It has been proposed that the acropetal initiation of lateral roots is a built-in process specified as part of the general process of cell division and differentiation in the parent root tip. Conversely, it is commonly reported that root branching is essentially a variable feature. In the present study, the interlateral distance along the parent root has been investigated using three banana varieties (Musa spp.) grown in two substrates. The pattern of lateral root initiation was obscured by variations of root growth patterns and vascular structure among roots, genotypes and substrates. A framework model is formulated showing the influence of growth pattern and vascular structure on branching density. The model raises a distinction between growth components which should not affect the branching density (i.e. rate of cell division) and which may affect it (i.e. size of mature cells and number of transverse divisions performed by cells executing their trajectory in the meristem). It appears also that lateral root density and root growth rate might be independently modulated by appropriate changes of root growth patterns, in banana and presumably many other taxa.

Document type Article de périodique (Journal article) – Article de recherche
Publication date 2002
Language Anglais
Journal information "Plant, Cell and Environment" - Vol. 25, no. 11, p. 1463-1474 (2002)
Peer reviewed yes
Publisher Blackwell Publishing Ltd (Oxford)
issn 0140-7791
e-issn 1365-3040
Publication status Publié
Affiliation UCL - AGRO/BAPA - Département de biologie appliquée et des productions agricoles
Keywords Musa ; lateral root initiation ; root growth pattern
Links
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Bibliographic reference Draye, Xavier. Consequences of root growth kinetics and vascular structure on the distribution of lateral roots. In: Plant, Cell and Environment, Vol. 25, no. 11, p. 1463-1474 (2002)
Permanent URL http://hdl.handle.net/2078.1/41555