Abstract
Abstract: Pollination is a fundamental process to produce food and maintain biodiversity in natural areas, since the production of seeds is related to its efficiency. Studies can determine the influence of reproductive systems on seed and seedlings quality and, consequently, on the structure of populations, helping the management, plant breeding and preservation of species. Campomanesia pubescens (DC.) O. Berg. (guabiroba) is a Brazilian shrub, pollinated by bees and occasionally by dipterans. This work aimed at evaluating the influence of pollination and reproductive system on seed production and germination and on the seedlings quality of C. pubescens. Phenology and floral biology were studied, and fruits from controlled pollinations were collected, in the Mogi Guaçu Biological Reserve, São Paulo State. The germination of seeds originated from self- and cross-pollination were analyzed, as well as the development of seedlings up to 180 days after germination. Seeds from self-pollination produced seedlings with lower development than the ones from cross-pollination, and they were more susceptible to mortality in laboratory and in greenhouse.
Highlights
Cerrado is the second largest Brazilian biome covering approximately 22% of the national territory, distributed mainly in the central region of Brazil
In this study we aimed to evaluate the effect of pollination and reproductive system on the quality of Camponesia pubescens seeds and seedlings
Its flowers have stamens organized in a shaving brush shape; anthesis occurred around 6:00 a.m. and lasted only a day, at the end of which they lost their petals and stamens, keeping only the pistil
Summary
Cerrado is the second largest Brazilian biome covering approximately 22% of the national territory, distributed mainly in the central region of Brazil. According to the Inventário da Flora Brasileira - Brazilian Flora Inventory (IBGE, 2008) the Myrtaceae is considered one of the richest families in the Cerrado biome, with 14 genera and 211 species It has commercially exploited fruit species such as the Brazilian grapetree (Plinia cauliflora (Mart.) Kausel), guava (Psidium guajava L.) and Brazilian cherry (Eugenia uniflora L.), as well as species with important medicinal properties and with the presence of volatile oils, demonstrating its great economic potential (Lima et al, 2006; Conceição and Aragão, 2010). The species is pollinated mainly by bees, some of which show buzz pollination behavior (Fidalgo and Kleinert, 2009)
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