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The Response of Root/Shoot Partitioning and Root Morphology to Light Reduction in Maize Genotypes

^a INRA Station d'amélioration des plantes fourragères, F-86600 Lusignan
^b Pioneer Génétique (SARL), F-35830 Betton
^c INRA Laboratoire de biologie cellulaire, Route de St-Cyr, F-78026 Versailles cedex

View larger version (22K): [in a new window]   Fig. 1. Allometric relationships between shoot and root dry weight, together with the original data and the regression coefficients per treatment across genotypes (with standard errors)

View larger version (34K): [in a new window]   Fig. 2. Root/shoot biomass ratio (log scale) as a function of the total biomass of the plant (vertical bars are the confidence intervals of the data from harvest at silking, at the 0.05 probability level)

View larger version (40K): [in a new window]   Fig. 3. Number of roots per plant (upper part of the figure) and root biomass per plant (lower part) at growth stage 4 as a function of the genotype and the treatment. Left-hand bars stand for normal conditions, right-hand bars for each genotype are the values under shade. The percentages refer to the relative decrease in trait under shade versus sunlight