Vegetative propagation of pequi (souari nut) by cutting

Abstract

Pequi is propagated mainly by the seminal pathway (seminal route) and presents an uneven and reduced germination. The increasing demand for fruits and seedlings for reforestation indicate the need for new strategies for the propagation of this species which would minimize the negative impact of predatory extractivism on Caryocar brasiliense. The present study aimed to assist the development of a protocol for the cutting of the pequi tree (pequizeiro). Different ages of the matrix plant and levels of foliation and pruning were assessed through the collection (sampling) of cuttings (stakes) from plants in the field. It was noted that cuttings (stakes) from seedlings (young plants) have greater rooting capacity when compared to cuttings derived from adult plants. Pequi leafless stakes failed to root. In contrast, stakes with 50% of leaflets cut from their original size showed 2.5% of rooting whereas those with 6 leaflets showed 22.5% of rooting. Stakes from pruned apical branches exhibited 21.2% of rooting. Both callogenesis and rooting of pequi stakes demonstrated the potential of this particular species from the Cerrado (Brazilian savanna) for cutting.

Vegetative rescue of Cedrela fissilis Vell. by the rooting of cuttings from epicormic and canopy sprouts

“…It is also possible to observe a low value, with no percentage of cuttings with calluses (Table 2). The presence of roots and calluses could be attributed to a higher maturity of the cutting, which has the highest amount of lignin and lower capacity for de-differentiation of cell tissue (GUIMARÃES et al, 2019).…”

“…Vegetative propagation can accelerate the rescue process of the vulnerable forest species from the naturally occurring habitat changes, since parental mapping may occur alongside genetic improvement and allow for propagation material throughout the year (DIAS et al, 2015;SÁ et al, 2018;GUIMARÃES et al, 2019). Therefore, vegetative propagation presents itself as an alternative to the seminal propagation weaknesses, enabling the rescue and multiplication of superior genotypes of trees (NAVROSKI et al, 2015).…”

Estaquia em frutíferas do Cerrado

“…Tentativas de produzir mudas de pequizeiro por meio de estacas foram demonstradas por Guimarães et al (2019) que conduziram experimentos testando matrizes de diferentes idades; podadas e não podadas; e estacas com distintos níveis de folheação. Por meio dos ensaios constatou-se que o pequizeiro apresenta potencial para o método da estaquia; e os melhores resultados foram obtidos nos tratamentos em que se coletaram estacas herbáceas de plantas jovens com a presença de folíolos.…”

MINI-CUTTING TECHNIQUE FOR VEGETATIVE PROPAGATION OF Paratecoma peroba

“…Vegetative propagation is an important tecniques means for conserving the germplasm of native and threatened species (Azad et al, 2018;Guo et al, 2017), and is the first stage that must be overcome for the domestication of species that have high economic potential (Atangana et al, 2006;Guimarães et al, 2019) stakes with 50% of leaflets cut from their original size showed 2.5% of rooting whereas those with 6 leaflets showed 22.5% of rooting. Stakes from pruned apical branches exhibited 21.2% of rooting.…”