title: Perspectives for a Framework to Understand Aril Initiation and Development.
abstract: A differentiated structure called "aril" has been described in seeds of several plant species during the course of evolution and might be considered as a supernumerary integument. Besides its ecological function in seed dispersal, the structure also represents a relevant character for systematic classification and exhibits important properties that impart agronomic value in certain species. Little is known about the molecular pathways underlying this morphological innovation because it is absent in currently used model species. A remarkable feature of the seeds ofPassifloraspecies is the presence of a conspicuous aril. This genus is known for the ornamental, medicinal, and food values of its species. In view of the molecular resources and tools available for somePassifloraspecies, we highlight the potential of these species as models for developmental studies of the aril.
authors.affiliation: Laboratório de Biotecnologia Vegetal, Centro de Energia Nuclear na Agricultura, Universidade de São Paulo Piracicaba, Brazil.
authors.forename: Sylvia R
authors.initials: SR
authors.lastname: Silveira
authors.affiliation: Departamento de Biologia Vegetal, Instituto de Biologia, Universidade Estadual de Campinas Campinas, Brazil.
authors.forename: Marcelo C
authors.initials: MC
authors.lastname: Dornelas
authors.affiliation: Laboratório de Biotecnologia Vegetal, Centro de Energia Nuclear na Agricultura, Universidade de São Paulo Piracicaba, Brazil.
authors.forename: Adriana P
authors.initials: AP
authors.lastname: Martinelli
keywords: Passiflora; aril development; integument; model species; ovule; seed