Propagação vegetativa de Piper umbellatum L. (Piperaceae) em função de substratos e comprimentos de estacas

Abstract

Artigo enviado em 11/12/2016, aceito em 23/01/2017 e publicado em 03/03/2017. RESUMO -Piper umbellatum L.(Piperaceae) é um subarbusto perene com atividades anti-inflamatórias, analgésicas, antimicrobianas, antitumorais, antioxidantes e dermoprotetoras. A obtenção da matéria-prima para estes fins é restrita ao extrativismo e às pequenas áreas de cultivo devido ao limitado conhecimento agronômico sobre a espécie. Neste sentido, são necessárias investigações referentes a práticas agronômicas, especialmente técnicas adequadas de propagação. O objetivo do presente trabalho foi avaliar diferentes comprimentos de estaca e tipos de substrato na estaquia de P. umbellatum. Para isso, estacas caulinares de 10, 15 e 20 cm de comprimento e diâmetro médio de um centímetro foram preparadas com corte em bisel na base e reto no ápice, sem folhas e contendo ao menos uma gema. Os propágulos foram estaqueados em tubetes com substrato Plantmax ® e vermiculita de granulometria fina, e mantidos em casa de vegetação. Após 50 dias da instalação do experimento foi avaliada a porcentagem de estacas enraizadas, mortas, com calos, com brotações, número médio de raízes, comprimento das três maiores raízes, massa fresca de raízes e de brotações. O enraizamento variou de 37,5% a 60,0% e não foi verificado interação entre substratos e comprimento das estacas, exceto para massa fresca de raízes e brotações, para as quais, estacas de maior comprimento apresentaram melhor desempenho. O substrato Plantmax ® apresentou menor mortalidade, maior porcentagem de estacas com calo, massa fresca de raízes e número de brotações. Neste sentido são indicadas estacas de 20 cm e utilização de substrato Plantmax ® para obtenção de mudas de melhor qualidade.Palavras-chave -Enraizamento. Estaquia. Plantmax ® . Produção de mudas. Vermiculita. Abstract -Piper umbellatum L.(Piperaceae) is a perennial underbrush with anti-inflammatory, analgesic, antimicrobial, antitumor, antioxidant and skin protective activities. Obtaining the raw material for these purposes is limited to extrativism and small areas of cultivation due to limited agronomic knowledge about the species. In this sense, investigations are required referring to agronomic practices, especially proper techniques of propagation. The objective of this study was to evaluate different cutting lengths and types of substrate in the cutting of the species. Softwood cuttings of 10, 15 and 20 cm in length and average one centimeter diameter were prepared a bevel cut on the base and a straight cut on the apex. The cuttings were made without leaves and containing at least one vegetative bud. The propagules were planted in plastic tubes with Plantmax ® substrate and fine-grained vermiculite, and maintained in a greenhouse. Fifty days after planting, the percentage of rooted, dead cuttings, cutting with calluses, sprouted cuttings, average number of roots, length of the three major roots and fresh weight of roots and shoots was evaluated. Rooting percentages varied between 37.5 to 60.0%. There was no interaction between...

Effect of cuttings defoliation and different substrates on the vegetative propagation of the monkey-pepper (Piper aduncum L.) (Piperaceae)

“…2) and confirmed the interespecific variation in Piper plant propagation, as pointed out by Dosseau (2009), Chaves et al (2014), Cunha et al (2015), Gomes and Krinski (2016a, 2016b), and Ferriani et al (2019. Ferriani et al (2018) also verified an increase in rooting percentage responses in cuttings with leaves in three species of Piper (P. arboreun, P. cernuum and P. diospyrifolium) with indolbutyric acid (IBA) use, highlighting new study perspectives.…”

“…These discrepancies in the rooting percentages showed the different genetic potentials of each species for adventitious root emission and suggested the need for specific studies for each species in order to define adequate propagation protocols (Gomes and Krinski, 2016a;2016b;. Further studies are indicated because of the biological and environmental importance reported in many native Piper species.…”

Propagation of native plants with ornamental potential from Serra do Oratório, Santa Catarina State, Brazil

“…The best viable propagation technique is vegetative propagation by cuttings that guarantees a progeny identical to the mother plant and also decreases time for seedlings use of several ornamental species (Loss et al, 2015). Then, it is necessary to study and standardize adequate procedures to each species (Gomes and Krinski, 2017). Plant cuttings can be woody and/or herbaceous, made from stems, tubers, bulbs, leaves, rhizomes and roots.…”

“…Among the common and accessible products for plantlets and seedlings production, commercial substrate and vermiculite are the most used by farmers and nurseries, being important to evaluate them in the rooting process of species of interest. Since a substrate must provide support for the plant, aeration, conditions for root development, proper water and nutrient absorption (Gomes and Krinski, 2017) it was chosen to evaluate substrates easy and cheap to obtaining. Among the environment factors that influence the cuttings rooting, the substrate has great importance supporting the cuttings (Zanao et al, 2016), justifying the soil use as a treatment, in order to promote stability for the cuttings.…”

Indolebutyric acid on boxwood propagation by stem cuttings

“…Vegetative propagation stands out for the maintenance of genetic characteristics of stock plants, uniformity and production precocity (SMARSI et al, 2008). Among the vegetative propagation methods, the propagation by stem cutting is characterized by its operational simplicity and low cost compared to other methods, as well as by its easy execution (HARTMANN et al, 2011;NUNES GOMES and KRINSKI, 2016b).…”