Advanced search
Start date

Floral development of Urticaceae Juss. Species

Grant number: 13/19459-3
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): November 01, 2013
Effective date (End): September 30, 2017
Field of knowledge:Biological Sciences - Botany - Plant Morphology
Principal researcher:Simone de Pádua Teixeira
Grantee:Giseli Donizete Pedersoli
Home Institution: Faculdade de Ciências Farmacêuticas de Ribeirão Preto (FCFRP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil


Urticaceae Juss. is a monophyletic group, characterized by the presence of litocistos which are specialized cells containing cystoliths of calcium carbonate, and stinging trichomes, occurring in several representatives. The flowers are diclinous, very small and inconspicuous, and exhibit variation on number of floral parts, especially in relation to perianth and androecium. The origin of this variation may be related to organ loss or fusion. Thus, the aim of this study is to compare the flower morphology at different developmental stages in different lineages in Urticaceae, to understand the great floral diversity displayed by the group. Possible synapomorphies will be highlighted. The evolution of some important characters on understanding the relationships among Urticaceae groups and between Urticaceae and Moraceae will be studied, using unpublished data for Moraceae. The method includes collecting buds of various sizes from at least two individuals per species, preparation for surface exam on scanning electron microscopy and histology on light microscopy. The TUNEL test will be conducted to determine programmed cell death in the gynoecium of pistillate flowers. It is expected that the flower development pathways are homologous, reflecting the evolutionary history of the group. The data collected will be unprecedented for the family, since studies of floral development are scarce in this group.Keywords: dicliny, floral morphology, floral ontogeny, perianth, Urticaceae.

News published in Agência FAPESP Newsletter about the scholarship:
Articles published in other media outlets (0 total):
More itemsLess items

Scientific publications (4)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
PEDERSOLI, GISELI D.; LEME, FLAVIA M.; LEITE, VIVIANE G.; TEIXEIRA, SIMONE P.. Anatomy solves the puzzle of explosive pollen release in wind-pollinated urticalean rosids. AMERICAN JOURNAL OF BOTANY, v. 106, n. 3, p. 489-506, . (14/07453-3, 12/15644-8, 13/19459-3)
PEDERSOLI, GISELI D.; GAGLIOTI, ANDRE L.; TEIXEIRA, SIMONE P.. Floral development elucidates the formation of a tubular calyx and connate stamens in Cecropieae species (Urticaceae). PLANT SYSTEMATICS AND EVOLUTION, v. 306, n. 4, . (14/07453-3, 13/19459-3, 12/15644-8)
DE BARROS, THAIS C.; PEDERSOLI, GISELI D.; PAULINO, JULIANA V.; TEIXEIRA, SIMONE P.. In the interface of caesalpinioids and mimosoids: Comparative floral development elucidates shared characters in Dimorphandra mollis and Pentaclethra macroloba (Leguminosae)(1). AMERICAN JOURNAL OF BOTANY, v. 104, n. 2, p. 218-232, . (13/19459-3)
PEDERSOLI, GISELI DONIZETE; TEIXEIRA, SIMONE PADUA. Flower morphogenesis and gametophyte fertility attest to the rare condition of gynomonoecy in Parietaria debilis (Urticaceae). BOTANY, v. 98, n. 12, p. 703-715, . (13/19459-3, 12/15644-8)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)
PEDERSOLI, Giseli Donizete. Morphology, development and aspects of the flower in Urticaceae Juss. species. 2017. Doctoral Thesis - Universidade de São Paulo (USP). Faculdade de Filosofia, Ciências e Letras de Ribeirão Preto (PCARP/BC) Ribeirão Preto.

Please report errors in scientific publications list by writing to: