Miniestaquia seriada na propagação da goiabeira 'Paluma'

Abstract

RESUMO -A miniestaquia seriada é uma técnica empregada na propagação comercial do Eucalyptus, e sua utilização tem mostrado efeito positivo sobre o enraizamento em clones de baixo potencial de enraizamento. O objetivo deste trabalho foi avaliar a técnica da miniestaquia seriada na sobrevivência e no enraizamento de miniestacas, e no vigor das mudas de goiabeira 'Paluma'. Foram conduzidos dois experimentos sob delineamento de blocos casualizados, com quatro repetições e cinco plantas por parcela. Aos sessenta e dois dias após o estaqueamento, verificou-se que as miniestacas tiveram sobrevivência acima de 90% e 90% de enraizamento. As mudas produzidas por miniestaquia de subcultivo (mudas obtidas a partir de minicepas formadas de miniestacas enraizadas), aos 138 dias após o estaqueamento, tinham altura inferior à das mudas provenientes de miniestacas de primeiro cultivo (mudas obtidas a partir de minicepas formadas pelo processo de estaquia convencional). Por outro lado, as avaliações realizadas aos 145 dias após o estaqueamento indicaram que as mudas produzidas por miniestaquia de subcultivo apresentaram o mesmo vigor de crescimento em área foliar, número de folhas e massa de matéria seca da parte aérea e do sistema radicular em relação às mudas produzidas por miniestacas de primeiro cultivo. Termos para indexação: Psidium guajava, propagação clonal, miniestaca, enraizamento. SERIAL MINICUTTING TECHNIQUE FOR GUAVA 'PALUMA' PROPAGATIONABSTRACT -The serial minicutting is a usual technique for commercial propagation of Eucalyptus and its application has been shown positive effect on the rooting of clones with poor rooting potential. The aim of this study was to evaluate the serial minicutting technique on minicuttings rooting and survival, and the vigor of the 'Paluma'guava plantlets. It was carried out two experiments in randomized blocks design with four replications and five plants per plot. At sixty-two days after cutting, it was verified that the minicuttings showed survival higher than 90% and 90% of rooting. The plantlets produced by minicuttings of the subculture (plantlets obtained from ministumps originated from rooted minicuttings), at 138 days after cutting, showed height smaller than that observed in plantlets obtained from minicuttings of the first culture (plantlets obtained from ministumps originated by the conventional cutting process). On the other hand, evaluations at 145 days after cutting demonstrated that the plantlets produced by minicuttings of the subculture presented the same growth vigor in the leaf area, leaf number and dry mass of the shoot and the root when compared to minicuttings of the first culture.

Brassinosteroid accelerates the growth of Psidium hybrid during acclimatization of seedlings obtained from minicuttings

“…The material was maintained in a greenhouse, under a clonal mini-garden system. The protocol followed to produce seedlings from minicuttings was described by Altoé & Marinho (2012). The seedlings were pruned to stimulate new sprouts and produce minicuttings.…”

“…In this respect, the production of grafted guava seedlings should become a new reality in commercial nurseries, with rootstock production as the first step to be optimized. Minicuttings show a great potential for guava farming, since they shorten the production time and provide propagative material under conditions that allow a better disease control (Marinho et al 2009, Altoé & Marinho 2012, Altoé et al 2013. However, the technique is incipient in commercial propagation and can be optimized, for example, by applying growth regulators at specific stages of the production process, including the rootstock production.…”

Rooting dynamics of Brazilian cherry tree minicuttings

“…The minicutting technique is used with several crops of great economic importance and several fruit tree species such as the guava (Psidium guajava) (Altoé and Marinho 2012), plum (Prunus salicina) (Tonietto et al, 2001), soursop (Annona muricata) (Figueirêdo et al, 2013) yellow passion fruit (Passiflora edulis f, Flavicarpa) (Carvalho et al, 2007), peach (Prunus persica) (Tomaz et al, 2014) and olive trees (Olea europaea) (Cappellaro 2013). They have all shown satisfactory results regarding seedlings production.…”

Sobrevivência, enraizamento e biomassa de miniestacas de aceroleira utilizando extrato de tiririca

“…A coleta das miniestacas foi realizada nas primeiras horas da manhã a partir de plantasmatrizes pertencentes ao pomar didático da UFERSA, foram extraídas da porção mediana de ramos, sendo padronizadas com 6 cm de comprimento (Altoé & Marinho, 2012;Marinho et al 2009;Altoé et al 2011;Santos et al 2005) Desdobrando tipo de folhas dentro de cada dose observa-se que apenas na dose 75% houve diferença signicativa, onde as miniestacas com folhas inteira apresentaram maior média para esta variável (Tabela 1). Tabela 1.…”