Differentiation of articulated laticifers in Tabernaemontana catharinensis (Apocynaceae)

• Grant number: 12/16441-3
• Support Opportunities: Scholarships in Brazil - Doctorate
• Effective date (Start): December 01, 2012
• Effective date (End): February 29, 2016
• Field of knowledge: Biological Sciences - Botany - Plant Morphology
• Principal Investigator: Silvia Rodrigues Machado
• Grantee: Yve Canaveze
• Host Institution: Instituto de Biociências (IBB). Universidade Estadual Paulista (UNESP). Campus de Botucatu. Botucatu , SP, Brazil

Abstract

During the development of the articulated laticifers, new cells are added to the system, including parenchyma cells (differentiated tissues), and ground meristem cells (undifferentiated tissues). However, we have found no studies that demonstrate the redifferentiation of parenchyma cells in laticers. Several lines of evidence have showed that the latex production is affected by biotic and abiotic conditions, among them herbivory pressure. Some hormones released during the herbivory, as ethylene and jasmonic acid, appear to stimulate the differentiation of this secretory structures. In laticifers, the jasmonic acid seems to be more involved in this process. Aiming to understand important aspects of the differentiation of laticifers, using immunocytochemical techniques and conventional (brightfield and confocal) light and transmission electron microscopy, we intend to answer the following questions: 1. Do parenchyma cells added to the laticifer system redifferentiate in laticifers or are as a deposit for latex, which had no structural relevant changing? 2. Are ethylene and jasmonic acid related to the differentiation of the primary and secondary laticifer system of plants?

Scientific publications

(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)

CANAVEZE, YVE; MASTROBERTI, ALEXANDRA ANTUNES; DE ARAUJO MARIATH, JORGE ERNESTO; MACHADO, SILVIA RODRIGUES. Cytological differentiation and cell wall involvement in the growth mechanisms of articulated laticifers in Tabernaemontana catharinensis A.DC. (Apocynaceae). PROTOPLASMA, v. 256, n. 1, p. 131-146, JAN 2019. (12/16441-3, 08/55434-7)

CANAVEZE, YVE; MACHADO, SILVIA RODRIGUES. The Occurrence of Intrusive Growth Associated with Articulated Laticifers in Tabernaemontana catharinensis A.DC., a New Record for Apocynaceae. INTERNATIONAL JOURNAL OF PLANT SCIENCES, v. 177, n. 5, p. 458-467, JUN 2016. (12/16441-3, 08/55434-7)

Academic Publications

(References retrieved automatically from State of São Paulo Research Institutions)

CANAVEZE, Yve. Differentiation of articulated laticifers in Tabernaemontana catharinensis (Apocynaceae). 2016. Doctoral Thesis - Universidade Estadual Paulista (Unesp). Instituto de Biociências. Botucatu Botucatu.