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Morphology and evolution of laticifers in Moraceae

Grant number: 13/21794-5
Support Opportunities:Scholarships in Brazil - Post-Doctoral
Effective date (Start): January 01, 2014
Effective date (End): September 30, 2017
Field of knowledge:Biological Sciences - Botany - Plant Morphology
Principal Investigator:Simone de Pádua Teixeira
Grantee:Cristina Ribeiro Marinho
Host Institution: Faculdade de Ciências Farmacêuticas de Ribeirão Preto (FCFRP). Universidade de São Paulo (USP). Ribeirão Preto , SP, Brazil
Associated scholarship(s):16/11647-3 - Comparative study of volatile terpenes from the latex of Moraceae species, BE.EP.PD


Laticifers are specialized cells in the secretion of latex, a suspension of various dispersed particles in a liquid with different refractive index. Morphologically, the laticifers are divided into four types: non-articulated unbranched, non-articulated branched, articulated anastomosing and articulated anastomosing. In Moraceae, the laticifers are considered a synapomorphy, and despite some anatomical studies suggest a variety of types of this structure in the family, they are generally classified as non-articulated and branched. The lack of ontogenetic studies of laticifers in the family probably led to their misclassification in the species. Moreover, as the latest phylogeny of Moraceae established more clearly the relationship between the tribes, the family constitutes a good model to contribute to the knowledge of both the anatomy and evolution of laticifers, since the studies of the evolution of secretory structures are rare. Thus, this work has as main objectives: (1) to study the anatomy and development of laticifers in species belonging to six tribes of the family Moraceae, (2) to identify the action of pectinases and cellulases in the laticifer wall formation in two species; and (3) trace the evolution of this secretory structure in the group. To this end, reproductive apical meristems of nine species of the family Moraceae covering the six tribes will be collected, fixed in Karnovsky and processed for analysis under light microscopy. Two species will be chosen for cytochemical analysis in transmission electron microscopy. A matrix of characters of laticifers will be elaborated.

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Scientific publications (5)
(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)
MARINHO, CRISTINA R.; TEIXEIRA, SIMONE P.. Novel reports of laticifers in Moraceae and Urticaceae: revisiting synapomorphies. PLANT SYSTEMATICS AND EVOLUTION, v. 305, n. 1, p. 13-31, . (13/21794-5, 14/07453-3)
BRUNA NOCE SCHNETZLER; SIMONE PÁDUA TEIXEIRA; AND CRISTINA RIBEIRO MARINHO. Trichomes that secrete substances of a mixed nature in the vegetative and reproductive organs of some species of Moraceae. Acta Botanica Brasilica, v. 31, n. 3, p. 392-402, . (14/07453-3, 13/21794-5)
SOUZA, CAMILA D.; PEREIRA, RODRIGO A. S.; MARINHO, CRISTINA R.; KJELLBERG, FINN; TEIXEIRA, SIMONE P.. Diversity of fig glands is associated with nursery mutualism in fig trees. AMERICAN JOURNAL OF BOTANY, v. 102, n. 10, p. 1564-1577, . (12/01247-7, 13/21794-5, 14/07453-3)
MARINHO, CRISTINA RIBEIRO; TEIXEIRA, SIMONE PADUA. Cellulases and pectinases act together on the development of articulated laticifers in Ficus montana and Maclura tinctoria (Moraceae). PROTOPLASMA, v. 256, n. 4, p. 1093-1107, . (18/03691-8, 14/07453-3, 13/21794-5)
MARINHO, CRISTINA RIBEIRO; SANTINELO PEREIRA, RODRIGO AUGUSTO; PENG, YAN-QIONG; TEIXEIRA, SIMONE PADUA. Laticifer distribution in fig inflorescence and its potential role in the fig-fig wasp mutualism. ACTA OECOLOGICA-INTERNATIONAL JOURNAL OF ECOLOGY, v. 90, n. SI, p. 160-167, . (13/21794-5, 14/07453-3)

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