Flower size-dependent variation in seed size: theory and a test

Article Abstract:

An optimal-allocation diagram was formulated to determine seed size variation among plants of similar species. The model included nonlinearity of ovule fertilization as a factor for seed size variation. The results were tested on naturally growing plants of Lilium auratum. Studies revealed that resource availability is a significant factor in seed size variation if allocation to pollen capture mechanisms are included. Flowers that can avail of larger resources can expect seed size increases.

Models, Growth (Plants), Plant growth

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Size-number trade-offs and the variation of seed size with plant resource status

Article Abstract:

A model was developed to show the relation parental resource status and optimal offspring size. The model demonstrated that individual variation in parental resources could give rise to positive correlations between size and number, even when there exists a resource trade-off between number of offspring within individuals. These results imply that the resource status of the parent influences the fitness-maximizing offspring size.

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Resource and pollen limitation: plant size-dependent reproductive patterns in Physalis longifolia

Article Abstract:

Pollen level effects on fruit size and seed number were investigated in the ground cherry, Physalis longifolia to determine resource and pollen limitation in the plant. Results indicate that large individuals are limited by both pollen and resource levels. These plants allocate resources in a way that maximizes production of seeds. On the other hand, small individuals are limitedonly by pollen levels.

Research, Pollen, Solanaceae

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