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Reproductive Development of White Clover (Trifolium repens L.) is Not Impaired by a Moderate Water Deficit That Reduces Vegetative Growth

II. Fertilization Efficiency and Seed Set

^a ENSAR-INRA, UMR Sols-Agronomie-Spatialisation, 65 rue de Saint-Brieuc, 35042 Rennes, France
^b Institute of Grassland and Environmental Research, Plas Gogerddan, Aberystwyth, Ceredigion, SY23 3EB, UK
^c Agro.M-CIRAD-INRA, UMR SYSTEM, 2 place Viala, 34060 Montpellier, France

View larger version (49K): [in a new window]   Fig. 1. Number of ovules (total bar) and number of seeds (black part of each bar) per inflorescence for cross-combinations performed between control plants (C x C), moderate water deficit plants (M x M) and severe water deficit plants (S x S). Data were obtained from the product of mean values of NO or NSd (Table 3) by the number of viable florets per inflorescence (Bissuel-Belaygue et al., 2002) and therefore could not be statistically analyzed.

View larger version (23K): [in a new window]   Fig. 2. Contribution of inflorescence number to seed yield (i.e. number of seeds per plant) under various water deficit treatments for each type of genotypes, having four (filled symbols, G3 and G4) or six (open symbols, G2 and G5) ovules per floret. Each point represents one treatment (well-watered, circle; moderate water deficit, triangle; severe water deficit, diamond) in one experiment.