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Influence of exogenous factors on the oleoresin secretory system of Copaifera langsdorffii Desf. (Leguminosae-Ceaslpinioideae)from cerrado

Grant number: 10/15153-9
Support Opportunities:Scholarships in Brazil - Scientific Initiation
Effective date (Start): November 01, 2010
Effective date (End): October 31, 2012
Field of knowledge:Biological Sciences - Botany - Plant Morphology
Principal Investigator:Tatiane Maria Rodrigues
Grantee:Amanda Gobette Coneglian
Host Institution: Instituto de Biociências (IBB). Universidade Estadual Paulista (UNESP). Campus de Botucatu. Botucatu , SP, Brazil
Associated research grant:08/55434-7 - Secretory structures in plant species from cerrado: structural, chemical and ecological approaches, AP.BTA.TEM


Secretory canals and cavities, generally named secretory spaces, are constituted by an uniseriate epithelium of secretory cells and a wide lumen where the secretion is accumulated. Secretory spaces occur in many members of Leguminosae and some of the produced substances, mainly the terpenes, are responsible by the plant resistance against microbial and predators attacks. Experimental researches have demonstrated that the density, distribution and structural characteristics of the secretory spaces in different plant groups are influenced by environmental biotic and abiotic factors. Copaifera langsdorffii, a legume tree of wide distribution, is recognized by the production of an oleoresin with high economic and ecological value in secretory cavities and canals along the vegetative axis. The first part of this Scientific Initiation study (FAPESP IC Proc 2010/15153-9) aimed to understand the structural answers of the Copaifera langsdorffii seedlings secretory system to different light and temperature conditions; based on the unpublished and relevant obtained results, this present proposal of scholarship renovation aims to study the influence of others external factors as the mechanical wound and the application of the plant hormones on the secretory system development of C. langsdorffii young plants. For this, plants maintained in greenhouse will be injured and submitted to application of methyl jasmonate and ethylene. The collected samples will be processed according to usual techniques of plant anatomy. Biometric analysis will be performed with a light microscope using specific software (Olympus Cell B). The obtained data will be submitted to statistic analysis. The results of this study, improving the knowledge on the influence of exogenous factors on the development and structure of the oleoresin secretory system in C. langsdorffii will subsidy management programs and the rational use of this species reinforcing the importance of the conservation of the Brazilian biodiversity.

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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)
RODRIGUES, T. M.; BUARQUE, P. F. S. M.; CONEGLIAN, A. G.; REIS, D. C.. Light and temperature induce variations in the density and ultrastructure of the secretory spaces in the diesel-tree (Copaifera langsdorffii Desf.-Leguminosae). TREES-STRUCTURE AND FUNCTION, v. 28, n. 2, p. 613-623, . (10/15153-9, 08/55434-7)

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