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Annals of Botany 71: 369-375, 1993
© 1993 Annals of Botany Company

Development of the Root System of Young Peach Trees (Prunus persia L. Batsch): A Morphometrical Analysis

L. Pagès, J. Kervella and J. Chadoeuf

INRA, Centre d'Avignon, Laboratoire d'Agronomie, Station de Recherches fruitières méditerranénnes, Laboratoire de Biométrie, Domaine St-Paul, F-84143 Montfavet CEDEX, France

The development of the root system of young peach (Prunus persica L. Batsch) seedling is inferred from the description of root system excavated at nine dates over a 6-week experiment. Both growth and branching processes are studied.

The length of the apical unbranched zone and the mean branch density are used to characterize branching processes. The branching order is an important source of variation for growth rate, growth duration and length of the apical unbranched zone. A gradient for those characteristics is found for first-order roots along the basal 40 mm of the taproots. Mean branch density is more constant. Variations in growth and branching processes are related. Fast growing roots tend to have a longer apical unbranched zone and, to a lesser extent a higher mean branch density. The consequences of those patterns of variation on the modelling of the development of root systems are discussed.Copyright 1993, 1999 Academic Press

Root system, development, growth, branching, architecture, morphology, morphometry, Prunus persica, Peach tree


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