Variabilidade genética de Eugenia uniflora L. em remanescentes florestais em diferentes estádios sucessionais

Abstract

Genetic variability of Eugenia uniflora L. in forest remnants at different successional stagesKnowledge on genetic diversity provides basic information about population dynamics and functioning aiming both to conservation and sustainable use of species. It is assumed that early successional populations could genetically be more differentiated than those in late sucessional stages. To test this hypothesis, the genetic variability of Eugenia uniflora L. populations at different successional stages was investigated. Two areas at different successional stages were selected; one at early successional stage, showing several pioneer trees, and another at late successional stage. The area in study (27°54'S and 52°13'W) is covered by a remnant forest in transition from Mixed Rain Forest to Recebido para publicação em 12/06/2012 e aprovado em 08/02/2013 1 Este trabalho é parte da dissertação de mestrado do primeiro autor.

Genetic and cytological diversity in cherry tree accessions ( Eugenia involucrata DC) in Rio Grande do Sul

“…Similar values were obtained with RAPD markers by Gomes Filho et al (2010) in guava trees (87.97%) and by Aguiar et al (2013), with 70 to 79% of polymorphism in Brazilian cherry tree populations. These results may be associated to the different populations evaluated as well as to the different collecting sites, because plants were sampled with considerable distance between them.…”

“…In this study, the genetic diversity analyses were performed using molecular markers because, according to Carvalho (2008), the cherry tree is a perennial species and only reaches reproductive age between six and seven years old, which would require too much time for analyses by morphological markers, particularly to evaluate the fruit. Thus, RAPD markers were used because, according to Aguiar et al (2013), they have a low cost and can be used on any species regardless of prior knowledge of the genome, being simpler and more suitable for rapid analysis of structure and diversity in natural populations.…”

Consórcio De Espécies Nativas Da Mata Atlântica Com Milho E Feijão Para Revegetação De Mata Ciliar Na Região Noroeste Fluminense

“…A espécie Campomanesia guazumifolia (gabiroba), classificada como não pioneira (AQUINO; BARBOSA, 2010;AGUIAR et al, 2013), apresentou menor incremento relativo em altura (IRH) no sistema consorciado (Figura 2), podendo ter sofrido efeito competitivo. Por pertencer a estágios mais avançados da sucessão ecológica, essa espécie pode, ainda, ter sofrido maior interferência da luz solar, por meio da exposição direta das mudas no plantio.…”

Diversity of flower visiting bees of Eugenia uniflora L. (Myrtaceae) in fragments of Atlantic Forest in South Brazil

“…It is therefore classified as a "pollenflower", which is characteristic of many species in this genus (Romagnolo & Souza, 2006). It has a prominent role in the natural regeneration of mixed ombrophilous forest, through seed replacement and by providing food for birds (Aguiar et al, 2013). Eugenia uniflora grows under different shading conditions, and propagates easily by seeds, these being the determining factors in the regeneration process (Scalon et al, 2001;Callegaro et al, 2012).…”