Floral development of Urticaceae Juss. Species

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

Abstract

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on understanding the relationships among Urticaceae groups and between Urticaceae and Moraceae will be studied, using unpublished data for Moraceae.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.

Scientific publications

(6)

(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 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, DEC 2020. (13/19459-3, 12/15644-8)

PEDERSOLI, GISELI D.; STAEDLER, YANNICK M.; SCHOENENBERGER, JUERG; TEIXEIRA, SIMONE P.. A comparative approach reveals diversity of floral developmental processes in Urticaceae. Botanical Journal of the Linnean Society, v. N/A, p. 26-pg., 2022-06-10. (12/15644-8, 13/19459-3, 14/07453-3)

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, FEB 2017. (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, JUL 18 2020. (14/07453-3, 13/19459-3, 12/15644-8)

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, MAR 2019. (14/07453-3, 12/15644-8, 13/19459-3)

THAIS CURY DE BARROS; CRISTINA RIBEIRO MARINHO; GISELI DONIZETE PEDERSOLI; JULIANA VILELLA PAULINO; SIMONE PÁDUA TEIXEIRA. Beyond pollination: diversity of secretory structures during flower development in different legume lineages. Acta Botanica Brasilica, v. 31, n. 3, p. 358-373, 2017-01-31. (09/01057-0, 12/01296-8, 13/19459-3)

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.