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Strategies of bud protection in phanerophytes and geophytes species of Homalolepis Turcz. (Simaroubaceae)

Grant number: 18/07527-8
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): July 01, 2018
Effective date (End): June 30, 2019
Field of knowledge:Biological Sciences - Botany
Principal Investigator:Gladys Flávia de Albuquerque Melo de Pinna
Grantee:Vinicius Silva Gabia
Home Institution: Instituto de Biociências (IB). Universidade de São Paulo (USP). São Paulo , SP, Brazil

Abstract

The Simaroubaceae (Sapindales), has about 109 species in 22 genera, being Homalolepis Turcz represented by 28 species restricted to tropical South America, with some of these extending to the north in Central America, distributed in the extra-Amazon region, mainly in the areas of Cerrado and Atlantic Forest. The genus presents a great variety of habit, varying from individuals with 30-50 cm with buds below the surface of the ground (geophyte), to trees that reach 30 meters (phanerophytes). Our preliminary results have demonstrated that Homalolepis is a very interesting group to studies about strategies of bud protection, with wide diversity of life forms and morphological structures associated. The objective of this study is to perform a comparative analysis of the mechanisms of bud protection and the subterranean system in Homalolepis species, aiming to establish the morphological and anatomical strategies from phanerophytes (H. insignis (St.Hil. & Tul.) Devecchi & Pirani) and H. glabra (Engl.) Devecchi & Pirani) and geophytes species (H. suffruticosa (Engl.) Devecchi & Pirani and H. salubris (Engl.) Devecchi & Pirani). The material including regions corresponding to the shoot apices and the underground system, will be collected and submitted to the usual techniques in optical microscopy and scanning electron microscopy (SEM). The obtained results will be confronted with each other and with the available literary, generating a discussion about strategies of bud protection and of the subterranean system in Homalolepis.