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AOBPreview published online on November 16, 2004
Annals of Botany, doi:10.1093/aob/mci031
© 2004 by Annals of Botany Company
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Received July 20, 2004
Revised September 6, 2004
Accepted September 28, 2004

Article

Phenotypic Correlations Among Plant Parts in Iberian Papilionoideae (Fabaceae)

JAVIER HERRERA 1*

1 Departamento de Biología Vegetal y Ecología, Universidad de Sevilla, Apartado 1095, E-41080 Sevilla, Spain

* To whom correspondence should be addressed.
JAVIER HERRERA, E-mail: maliani{at}us.es


  Abstract

• Background and Aims Different plant organs may show varying degrees of form diversification or conservatism across phylogenetically related taxa. The present study uses data from a recent systematic study of Iberian Papilionoideae to investigate diversification and covariation in reproductive and vegetative plant parts. The appropriateness of imprecise (but comprehensive) taxonomic quantitative information is tested.

• Methods Organ size covariation and phenotypic correlations were studied among tribes, genera and species. Scale relationships were investigated by Reduced Major Axis regression. Variables used were the maximum dimensions of calyx, corolla, keel petal, fruit, seed, stipule, leaflet and petiole.

• Key Results As regards tribe averages, the length of the corolla and that of calyx correlated positively and significantly. In contrast, pod length was unrelated to corolla size and largely tribe-specific. Within genera, the sizes of calyx, corolla and fruit sometimes covaried linearly (e.g. Lathyrus species) and other times did not (Genista, Astragalus).

• Conclusions Information from taxonomic studies can be useful to establish major phenotypic correlations in plants. Results underscore the implications of tribal ownership in the Papilionoideae and illustrate the extensive morphological diversification of pods relative to flowers in this group.

Keywords: Allometry, flowers, fruits, genera, isometry, Papilionoideae, petals, seeds, leaves, tribes.
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