Reproductive biology in the primitive relic Angiosperm Drimys brasiliensis (Winteraceae)

From field observations on Drimys brasiliensis, principally in the Botucatu region of São Paulo State, Brazil, new data on the reproductive biology, the rhythm of growth, and the development of lateral cymose inflorescences, flowers and fruits are presented. Pollination accelerates the rate of flower-development for about 4-6 days. Pollination experiments show that D. brasiliensis is not self-sterile; because of mechanical devices the sticky pollen grains do not normally come into contact with the stigmata unless an animal pollen vector is involved. The pollinators are diurnal Coleoptera, Diptera and Thysanoptera which eat from the pollen, lick from the stigmatic exudates and (in case of the flies) probably also from the staminal glands. Fruit- and seedeaters are birds which seem to be the main dispersal agents. Establishment of new individuals normally is through seedlings, but also by vegetative propagation through plagiotropous branches which may root and separate from the mother plant. The morphological, developmental and reproductive aspects in D. brasiliensis are discussed in a wider context, compared with data from other Magnoliidae, and related to aspects of early Angiosperm evolution. © 1980 Springer-Verlag.

Evaluation of microsatellite markers in cultivars of sweet orange (Citrus sinensis [L.] Osbeck)

Sweet orange is considered a very important species in the citrus world market and presents wide morphological variability. However, its characterization at the molecular level by random amplified polymorphic DNA (RAPD) and isozyme markers is not appropriate. Microsatellite or simple sequence repeats (SSRs) have been suggested as ideal for studies in cultures of vegetative propagation and as value markers for mapping in several species. However, information on microsatellite polymorphism in citrus species is scarce. In this work, microsatellite markers (AG-repeats) were developed from an enrichment library of genomic DNA of sweet orange cv. Pera (Citrus sinensis [L.] Osbeck), and 31 cultivars of sweet orange were evaluated. Evaluation of 18 microsatellite primers did not permit differentiation of the varieties studied. New microsatellite primers are being evaluated with the aim of detecting polymorphisms among the cultivars and closely related species to be used in genetic mapping programs.

Enraizamento de plantas cultivadas in vitro

The adventitious rooting process of in vitro cultured plantlets is a technique that has been employed for the vegetative propagation of a significant number of native and exotic species. Many factors are associated with the rooting stage influencing positive and/or negatively the establishment of micropropagation protocols. The objective of this work was a literature review of the main inherent factors concerning in vitro rooting process including the correlation among others the endogenous and exogenous auxins levels, juvenility, genotype, mineral nutrition, culture medium conditions, addition of growth regulators and other substances as phenolic compounds and active coal besides growth environmental conditions of in vitro cultures. Although the complete elucidation of all processes involved with rooting of in vitro cultured plants has not been achieved so far, a comprehensive study of the main factors that interfere on rooting is fundamental for the establishment of new researches that might contribute for the rooting of economically important plants.

Nota científica: Clonagem do abieiro por estaquia herbácea de ramos

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Utilização de reguladores vegetais na propagação vegetativa de clidemia blepharodes DC. e C. Suffruticosa O. Berg (Melastomataceae)

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Propagação do rambutanzeiro (Nephelium lapacceum L.)

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Propagação de Hancornia speciosa Gomes – Apocynaceae, por alporquia e micropropagação

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Variabilidade genética de caracteres relacionados ao enraizamento de estacas de progênies e clones de guanandi (Calophyllum brasiliense Cambess

Pós-graduação em Ciência Florestal - FCA

Propagação de Passiflora incarnata L. com o uso de estacas radiculares

Pós-graduação em Agronomia (Horticultura) - FCA

Cacaueiro: propagação por estacas caulinares e plantio no semi-árido do Estado da Bahia

Pós-graduação em Agronomia (Produção Vegetal) - FCAV

Substratos e estaquia na produção de mudas de cacaueiro

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Viroses do alho: métodos de diagnose e degenerescência do alho semente livre de vírus

Pós-graduação em Agronomia (Proteção de Plantas) - FCA

Micropropagação da figueira (Ficus carica L.): estabelecimento, multiplicação e enraizamento in vitro

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

Enraizamento de Eucalyptus grandis x Eucalyptus urophylla pela ação de peróxido de hidrogênio, quercetina e ácido indolbutírico

Pós-graduação em Ciências Biológicas (Botânica) - IBB

Estaquia em Anonas

Annonaceae is an important family of plants that constitutes the Brazilian flora. Anona species produce fruits for fresh consumption, medicinal use and other purposes. The aim of this study is to present information of literature about vegetative propagation by cutting of some Annonaceae species with potential for consumption and as rootstock. As conclusion, the literature presents a range of rooting results, even about the same species. The rooting success depends on the species, variety, stock plant, season, plant growth regulators, rooting environment and juvenility. Some species present rooting potential, but there are lack of literature about plant management and orchard installation. The use of plant growth regulators improves the rooting of the most species with potential to propagate by cuttings.